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Item documentation

Item documentation for Honeywell Enraf series 854 Level Gauges, 97x series SmartRadars Gauges and 877 Field Display & Interface

August 2013 Part no.: 4416277 Revision 5

Enraf B.V. P.O. Box 812 2600 AV Delft Netherlands Tel. : +31 15 2701100 Fax : +31 15 2701111 E-mail : [email protected] Website : http://www.honeywellenraf.com

Item documentation

Copyright 1998 - 2013 Enraf B.V. All rights reserved. Reproduction in any form without the prior consent of Enraf B.V. is not allowed. This manual is for information only. The contents, descriptions and specifications are subject to change without notice. Enraf B.V. accepts no responsibility for any errors that may appear in this manual. The warranty terms and conditions applicable in the country of purchase in respect to Enraf B.V. products are available from your supplier. Please retain them with your proof of purchase.

Preface

Item documentation

Preface This manual has been written for the technicians involved in the commissioning and service of the Honeywell Enraf series 854 level gauges, series 97x SmartRadar gauges and 877 Field Display & Interface. For installation and commissioning instructions of the instrument, please refer to the installation guides and instruction manuals of the applicable instruments and to the option manuals. This document only gives the item description of the basic level gauge and all its options. For an overview, refer to Appendix B related documents. Safety and prevention of damage Safe execution of the procedures in this manual requires technical experience in handling tools, and knowledge of safety regulations in handling electrical installation in hazardous environments. “Warnings”, “Cautions”, and “Notes” have been used throughout this manual to bring special matters to the immediate attention of the reader. • A Warning concerns danger to the safety of the technician or user; • A Caution draws attention to an action which may damage the equipment; • A Note points out a statement deserving more emphasis than the general text, but does not deserve a

“Warning” or a “Caution”. The sequence of steps in a procedure may also be important from the point of view of personal safety and prevention of damage; it is therefore advised not to change the sequence of procedural steps or alter a procedure. Legal aspects The information in this manual is copyright property of Enraf B.V., Netherlands. Enraf B.V. disclaims any responsibility for personal injury or damage to equipment caused by: • Deviation from any of the prescribed procedures; • Execution of activities that are not prescribed; • Negligence of the general safety precautions for handling tools and use of electricity. Additional information Please do not hesitate to contact Honeywell Enraf or its representative if you require additional information.

Table of contents

Item documentation

Table of contents

Preface .................................................................................................................................................................... 3

1 Introduction ......................................................................................................................................................... 5

2 Level items ......................................................................................................................................................... 6

2.1 Common level items ................................................................................................................................ 6

2.2 Specific 854 level gauge items .............................................................................................................. 10

2.3 Specific 97x SmartRadar gauge items .................................................................................................. 20

2.4 Specific 877 Field Display & Interface items ......................................................................................... 36

3 XPU items (display, communications) .............................................................................................................. 39

4 Optional function items ..................................................................................................................................... 48

4.1 Servo density items ............................................................................................................................... 48

4.2 Servo auto test items ............................................................................................................................. 52

4.3 Analog level output items ...................................................................................................................... 55

4.4 Spot temperature items for HCU and ICU_HPI ..................................................................................... 59

4.5 Average temperature items (VITO-MTT-LT-MRT) ................................................................................ 62

4.6 HIMS / HTG items ................................................................................................................................. 68

4.7 Water bottom items ............................................................................................................................... 78

Appendix A ASCII table ............................................................................................................................... 82

Appendix B Related documents................................................................................................................... 83

Item index .............................................................................................................................................................. 84

Introduction

Item documentation

1 Introduction In this manual the specific instrument items of the following gauges are described:

• Servo gauges (models 854 ATG and 854 XTG) • SmartRadar gauges (models 970 ATi, 971 AT and 973 LT) • 877 Field Display & Interface

Besides that, the items of all optional functions are described with the following current option boards:

• servo density • analog level output (HPO / HCU boards) • spot temperature measurement (HCU / ICU_HPI boards) • average temperature measurement with MRT/MTT (HCU / ICU_HPI boards) • HIMS / HTG configuration (HCU / ICU_HPI boards) • Water bottom measurement (HCU / ICU_HPI boards)

A further description can be found in “ITEMLIST”, and in the help function of the “Engauge” service tool, both available from Enraf B.V. (or its representative). The items can be of type N (Novram), D (data), or C (Command). Novram items are items from which the data is stored in the NOVRAM on the XPU board (for instance: the reference level item RL). Data items are items which contain the measured and calculated data (for instance: the radar ullage RU). The measured and calculated data are not stored in NOVRAM. Command items are items which results in an action; for instance item RS: resets the instrument. Indexed items can be recognized by the column: Elem. In that column the number of elements is specified. The protection level refers to the protection level 1 or 2 password which is required to issue the item. Changes in revision 5 (with respect to previous version) are:

• deleted items for 873 SmartRadar • deleted descriptions of previous option boards MPU, HPU, OPU and HSU • deleted descriptions of 862 MIR and 862 MIT • added description of 762 VITO MTT/LT, 762 VITO MRT and HCU and ICU_HPI option boards

Level items (common)

Item documentation

2 Level items

2.1 Common level items

AH Alarm hysteresis

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1

determined by item LD

+000.0100 (m)

The level alarm hysteresis is used to set a hysteresis around the level alarms. Refer to HA, HH, LA and LL.

Note: The software does not check for the size and an eventually negative sign of the hysteresis.

AR Accept reference

Type Elem.

Protection

Dimension

Entry format

Default value

C

level 2

With the AR command, the 854 level gauge accepts the level, specified in item RL, as the current level. The gauge performs a controlled reset, but remains in protection level 2. When the SmartRadar is in calibration mode, and no warning code is active, this command takes the value specified in item RL (reference level) as the indicated radar level. Internally, a distance called radar position (item PR), is calculated as: RL + internal offset (antenna parameter). PR corresponds with the nozzle (or manhole) flange height. After the AR command, the level "jumps" to its new value. The radar level is made equal to the level from item RL, inclusive active compensations. After the AR command, the SmartRadar will remain in protection level 2.

DE Level type

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

1 ASCII character

I

The level type item selects the type of level which will be shown on the display (if present) and transmitted in the level record to the host via Enraf field bus line,

RS232/485 line, or HART® communication

1). The level type can be:

• C : Compensated innage (not with SmartRadar) • I : Innage • U : Ullage

When ‘C’ is selected, the level is compensated for the hydrostatic deformation of the tank. Refer to items HF and HL. 1)

HART® communication only available on 973 SmartRadar LT.

HA High level alarm

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1


+026.0000 (m)

With item HA, a high level alarm set point can be given. When the level exceeds the programmed high alarm setting, a status bit is set in item QS (servo status request), QR (radar status request) or QF (hydrostatic status request) and the character "H" is transmitted in the alarm status byte of the level record. To prevent the on/off switching of the high level alarm status, due to variations in the level measurement, an alarm hysteresis is implemented (item AH). The high level alarm status is set when the measured level is higher than the high level alarm set point. The high level alarm status is reset when the measured level is lower than the high level alarm set point minus the alarm hysteresis.


Item documentation

HF Hydrostatic deformation factor

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

mm/m

standard floating point format

+.00000000E+00

When the tank is not equipped with a stable mounting stud for installation of the instrument, item HF can be used together with the hydrostatic deformation level (item HL), to compensate the level reading. The compensation becomes effective from levels above the setting in item HL. In formula:

levelcomp. = level - (level - HL) x HF A positive signed HF indicates that the compensation of the innage level is subtracted in order to obtain a compensated level. When no compensation is required item HF must contain the default value.. For the 854 level gauges, the compensated level can be requested by item CQ (compensated innage servo). The compensated innage will be shown on the display and transmitted via the Enraf field bus when item DE (level type) is set to ‘C’ (compensated innage). For the SmartRadar, the compensated level can be requested by item RI (radar innage) if the compensation switch (item CS) is enabled

for hydrostatic deformation (8th

position to ‘H’).

The level on the display and on the Enraf field bus or RS232/485

or HART® line are automatically adapted when the hydrostatic

deformation is enabled in item CS.

Note: As the alarm levels and the reference level are defined as compensated innage levels, the location of these levels also depends on the setting of the hydrostatic deformation factor.

HH High high level alarm

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1 (877) level 2 (854, 97x)


+026.1000 (m)

With item HH, a high high level alarm set point can be given. When the level exceeds the programmed high high alarm setting, a status bit is set in items QS (servo status request), QR (radar status request) or QF (hydrostatic status request). To prevent the on/off switching of the high high level alarm status, due to variations in the level measurement, an alarm hysteresis is implemented (item AH). The high high level alarm status is set when the measured level is higher than the high high level alarm set point. The high high level alarm status is reset when the measured level is lower than the high high level alarm set point minus the alarm hysteresis.

HL Hydrostatic deformation level

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


+002.0000 (m)

Item HL is the start level for the compensation of hydrostatic tank deformation. Refer to HF.


Item documentation

LA Low level alarm

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1


+002.0000 (m)

With item LA, a low level alarm set point can be given. When the level drops below the programmed low alarm setting, a status bit is set in items QS (servo status request), QR (radar status request) or QF (hydrostatic status request) and the character "L" is transmitted in the alarm status byte of the level record. To prevent the on/off switching of the low level alarm status, due to variations in the level measurement, an alarm hysteresis is implemented (item AH). The low level alarm status is set when the measured level is lower than the low level alarm set point. The low level alarm status is reset when the measured level is higher than the low level alarm set point plus the alarm hysteresis.

LD Level dimension

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

1 ASCII character

M

Item LD determines the dimension in which the calculated level will be presented. All NOVRAM data which contain a level value will have the same dimension and have to be presented in the same format.

Item LD Dimension Format

M m sign X X X sep X X X X

F ft sign X X X X sep X X X

I inch sign X X X X X sep X X

P ft in 1/16 sign X X ft X X in X X

sign = + or - ft = ' sep = . or , X = digit in = "

LL Low low level alarm

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1


+001.9000 (m)

With item LL, a low low level alarm set point can be given. When the level drops below the programmed low low alarm setting, a status bit is set in items QS (servo status request), QR (radar status request) or QF (hydrostatic status request). To prevent the on/off switching of the low low level alarm status, due to variations in the level measurement, an alarm hysteresis is implemented (item AH). The low low level alarm status is set when the measured level is lower than the low low level alarm set point. The low low level alarm status is reset when the measured level is higher than the low low level alarm set point plus the alarm hysteresis.

RL Reference level

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


+026.0000 (m)

The reference level is considered as the true level at the moment the AR (accept reference) command is given.

RN Relay command

Type Elem.

Protection

Dimension

Entry format

Default value

D

not protected

8 ASCII characters; see below

Item RN is used for remote control of the relays. The eight bytes (C1, T1, T2, T3, C2, T4, T5, T6) control both relays as follows:

C1 (C2) Relay 1 (2) command: T1, T2, T3 (T4, T5, T6) Relay 1 (2) time data field A Activate relay 1 (2) 000 - 999 Time setting in seconds for ‘Activate’ command only. D De-activate relay 1 (2) If the time field is set to 000, the relay is continuously activated. K Alarm acknowledge For the other commands, dummy values must be specified - Don’t change (e.g. RN=K000-000).

The acknowledge command can only be given when the relay is programmed for level alarm operation. The other commands can only be given as the relay is set for remote control.

The following dimensions are possible:

• M : metres • F : feet • I : inches

• P : fractions (feet, inches and 1/16 of inches)

When item LD is changed, all level items must be converted to the new dimension and new format. With the XPU-2, that will be done automatically. Each dimension has its own format; the formats are listed in the table at the left.


Item documentation

RX Relay status

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

FF

These two bytes (B0 for relay 1, B1 for relay 2) of item RX contain the current setting of both relays:

B0 (B1) Status of relay 1 (2) K Acknowledged alarm D De-activated relay A Activated relay T Relay is active with time setting F Relay fail N Relay is not mounted - Initial value (SmartRadar only

RY Relay alarm mode

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1 level 2 (854 XPU A3.1)


HA - LA - (854) HACLAC (877)

For 854 and 877 only! The six bytes (A1, A2, M1, A3, A4, M2) of item RY can be used to couple the relays to a level alarm or to set-up the relay for remote control:

A1, A2 (A3, A4) Usage of relay 1 (2) M1 (M2) Relay 1 (2) mode (for 854) HH High high level alarm T Relay will always be active if an alarm level is reached HA High level alarm - Relay will only be active if an alarm level is reached and there LA Low level alarm is no test status active LL Low low level alarm W Relay will only be active if an alarm level is reached and there RC Remote control is neither a test status nor a water dip measurement active NM Relay not mounted

M1 (M2) Relay 1 (2) mode (for 877) A Relay is active if (alarm status and valid level) or if invalid level or if gauge fail B Relay is active if alarm status (with valid or invalid level) or if gauge fail C Relay is active if (alarm status and valid level) or if gauge fail D Relay is active if (alarm status and valid level)

RZ Relay mode

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1 level 2 (854 XPU A3.1)


DEDE

For 854 and 877 only! These four bytes (B0, B1, B2, B3) determine if the relay is energized or de-energized in case of no alarm situation and gauge fail.

B0 (B2) Operation mode relay 1 (2) B1 (B3) Fail mode relay 1 (2)

E Relay energized in case of no alarm situation E Relay energized in case of gauge failure D Relay de-energized in case of no alarm situation D Relay de-energized in case of gauge failure

UR Upper reference level

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


+027.0000 (m)

The upper reference level item is used to calculate an ullage, based on the programmed upper reference value. If item DE (level type) is set to ‘U’, then the ullage will be displayed in display format A and B and the ullage will be transmitted in the level records. The ullage is calculated as: Ullage = Upper reference level level

Level items (854)

Item documentation

2.2 Specific 854 level gauge items

BF Average measured frequency

Type Elem.

Protection

Dimension

Entry format

Default value

D

not protected

Hz

-.99999999E-99

With this item the measured average frequency can be requested after balance test BT command. Refer to BT, BU, BV and DO.

BL Block

Type Elem.

Protection

Dimension

Entry format

Default value

C

not protected

The block command stops the displacer. Refer to BM, HC and UN.

BM Block mode

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1

1 ASCII character

C

The block mode selects whether the block command remains active after level I1, I2 or I3 has reached the displacer.

• C : Continuous; the block command will remain active until another operational command with a higher priority overrides the block command. • N : Non-continuous; the block command will be cancelled if the product reaches the displacer.

In both block modes (BL and BM) the gauge will check the force on the displacer. When a force exceeding 350 gram acts on the sensor the displacer will be lowered to prevent wire rupture.

BT Balance test

Type Elem.

Protection

Dimension

Entry format

Default value

C

level 2

SPU version A0.61/A1.0:

The balance test command checks the balance of the measuring drum. The measuring drum makes one revolution while the force on the force transducer is measured continuously.

SPU version A2.0 and up:

To increase the accuracy of the balance test, the force of the sensor is measured at discrete positions (default 8 positions, refer to DO), equally distributed over the circumference of the measuring drum.

The maximum and minimum forces are stored as BU and BV. Upon completion of BT the 854 changes over to a freeze FR situation.

Note: The minimum free space below the displacer at start of BT is: 400 mm.

BU Maximum unbalanced weight

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

grams

-.99999999E-99

Once the balance test has been performed, the maximum force that was found during the measurement can be read in this item. Until the first balance test command has been processed by the SPU, this item will contain the default value -.99999999E-99. Immediately after giving a next BT command, the BU item will be filled again with this default value.

BV Minimum unbalanced weight

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

grams

-.99999999E-99

Item BV contains the minimum force measured during the balance test BT.

Level items (854)

Item documentation

BW Average unbalanced weight

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

grams

-.99999999E-99

Item BW contains the average force measured during the balance test BT (can be done with displacer).

CA Calibrate

Type Elem.

Protection

Dimension

Entry format

Default value

C

not protected

The calibrate command performs a calibration test by moving the displacer until it meets the ‘calibration plate’ of the gauge (above the limit switch). The computed compensated innage level, corresponding to this position, is compared with the known tank top level (item TT). If a difference greater than ± 2.5 mm is found between these two levels, the result of the calibration test will be a ‘fail’.

Note: The CA command is only operational when the first position in item WT contains an ‘E’ and it is not disabled in HC.

CQ Compensated innage servo level

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access


@@P - - 99999999

Item CQ contains the innage servo level, compensated for hydrostatic tank deformation. The value is preceded by four status bytes; refer to the description of item QS. Refer to items LQ, HF and HL.

DA Displacer area

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

cm

2


+.65000000E+02

Item DA is the displacer area in cm2. Minimum value: +.10000000E+01; maximum value: +.50000000E+03.

DC Drum circumference

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

metres


+.00000000E+00

The circumference of the measuring drum, which is engraved in the drum, must be programmed in item DC.

DH Dip height

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1


+000.3000 (m)

When the 854 operates in dip mode DM, the displacer will be raised after each product dip to a distance DH above the product level. There are no limits to the maximum value for the dip height, however, the displacer will never be raised above the motor limit switch high setting (item MH).

DM Dip mode

Type Elem.

Protection

Dimension

Entry format

Default value

C

not protected

When the gauge is in dip mode the displacer will be set at a distance DH above interface I1. After a fixed time DT a single product measurement will be executed and after measuring the interface level, the displacer will be raised again. This sequence will be repeated once every dip time DT. In this mode the calculated level items LQ, UQ and CQ will show the last measured product level (when available) and not the actual displacer position. The dip mode is cancelled when the one of the three interfaces is selected (I1, I2 or I3). Refer to DH, DT, HC and UN

Level items (854)

Item documentation

DO Density number of samples (per revolution)

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

1 ASCII character

F

During a BT and a TP command the apparent weight of the displacer is measured over a ‘complete’ drum revolution. With item DO a fixed number of measuring points per drum revolution can be set. We recommend to set item DO to ‘8’. Minimum value: 1; maximum value: F.

DT Dip time interval

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1

seconds


+.60000000E+02

The dip interval time DT specifies the time in seconds between two measurements in dip mode. Refer to DM. The minimum value is: +.10000000E+01; the maximum value is:+.32767000E+05

DW Displacer weight

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

grams


+.22300000E+03

Item DW contains the weight of the displacer in air. Request via BT / BW. The minimum value is: +.10000000E+03; the maximum value is: +.30000000E+03

ER Error restart

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1


BL I1 (XPU A0.6 - A3.0) TGI1 (XPU A3.1 and higher)

Item ER specifies how the gauge will start after a reset, not caused by a power failure. Except an error situation it could be a RS or an EX command. From the 4 characters, the first two contain the desired operational command and the last two the desired default interface.

Pos. 1, 2 Operational command Pos. 3, 4 Special command - - No operational command I1 Interface 1 BL Block command I2 Interface 2 CA Calibrate command I3 Interface 3 FR Freeze command DM Dip mode LT Lock test command TG Test gauge command

Note: When in ER a command is specified that is disabled in the host command mode (item HC) the gauge starts up with this command.

ES Error SPU request

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

0000

The Error SPU request item contains the last error that occurred in the SPU. Refer to the SPU error list below: 0000 Initializing the SPU / no error detected. 0024 CC range error. 0001 Internal RAM error . 0034 DA range error. 0002 External RAM error. The RAM chip is defect. 0044 DC range error. A valid drum circumference must be set 0003 EPROM has an incorrect checksum. (Replace it). after initialising the NOVRAM. 0004 Syntax error. Invalid number of parameters. The SPU received 0064 DW range error. too much parameters during start up. Mostly caused by software 0074 DV range error. version conflict. Check compatibility of XPU & SPU software.

Level items (854)

Item documentation

0080 EQ motor position syntax error. During start up an incorrect motor

position counter value was supplied to the SPU. Use AR to solve problem.

0081 Syntax error of EQ. An incorrect value of the reference encoder position (> 200) was supplied to the SPU during start up. Use AR to solve problem.

0082 EQ motor field position syntax error. An incorrect value of the motor field position (> 7) was supplied to the SPU during start up. Use AR to solve problem.

0083 EQ Checksum error. An incorrect checksum over the EQ item was supplied to the SPU during start up. Use AR to solve problem.

0104 F0 range error. 0114 F1 range error. 0124 F2 range error. 0134 F3 range error. 0154 HF range error. 0234 MH range error. A too high or too low level was supplied as MH

motor limit switch high. Verify the DC and RL items if the MH level is correct.

0235 MH / ML range error. There must be a greater distance between the motor limit switch levels than recently is specified. Verify item DC if the MH and ML level items are correct.

0244 ML range error. A too low or too high level was supplied as motor limit switch low. Verify the DC and RL items if the ML level item is correct.

0274 RM range error. 0284 S1 range error. 0294 S2 range error. 0304 S3 range error. 0314 T1 range error. 0324 T2 range error. 0334 T3 range error. 0364 WW range error. 0401 Set-point calculation divide by zero error. During further handling

of the F0 .. F3, T1 .. T3 or S1 .. S3 items a divide by zero situation occurred. Check these items.

0402 Floating point overflow error. During calculations with the set point items F0 .. F3, T1 .. T3 or S1 .. S3 an overflow situation occurred. Check these items.

0404 Polynomial constants out of range 1. The specified F0 ... F3 items are no points of a valid frequency characteristic. Check the F0 .. F3 items and the force transducer.

0405 Polynomial constants out of range 2. The specified F0 ... F3 items are no points of a valid frequency characteristic. Check the F0 .. F3 items and the force transducer.

0406 Non convergent Newton Raphson algorithm. The set points S1 .. S3 or the WW can’t be transferred to valid frequency’s with the internal Newton Raphson algorithm. Please check the F0 .. F3, S1 .. S3 and WW items.

0407 Force transducer initialisation error. The force transducer does not start up correctly, or the motor unit has not been unlocked.

0414 RF range error. 0434 WV range error. 0471 MZ divide by zero error. An invalid value of the lock test motor

limit switch has caused an internal divide by zero situation. 0472 MZ floating point overflow error. An invalid value of the lock test

motor limit switch has caused an internal overflow. 0474 MZ range error. The MZ level exceeds the theoretical range of

the gauge of (RL - MZ) ≤ 1260 x DC. 0481 DH divide by zero error. An invalid value of the dip height has

caused an internal divide by zero situation. 0482 DH floating point overflow error. An invalid value of the dip height

has caused an internal overflow. 0484 DH range error. The DH distance exceeds the theoretical range

of the gauge of DH ≤ 1260 x DC. 0494 DT range error. 0500 Stack overflow 1. Unrecoverable SPU error. Processor stack too

large during scheduling. 0501 Stack overflow 2. Unrecoverable SPU error. Maximum processor

stack size exceeded. 0502 Unknown message. Unrecoverable SPU error. One of the

processors has received an unknown intern process message or the SPU has received an unknown command or data item.

0503 Empty message queue. Unrecoverable SPU error. The message queue was empty. This can be the result of too much commands within too short time, but also a software problem.

0504 End of EPROM reached. Unrecoverable SPU error. General software error.

0505 Software trap. Unrecoverable SPU error. General software error. 0511 DZ divide by zero error. An invalid value of DZ caused an

internal divide by zero situation. 0512 DZ floating point overflow error. An invalid value of DZ has

caused an internal overflow. 0534 A1 range error. 0544 A2 range error. 0551 Position overflow. An internal motor position overflow has

occurred. Check the dip height item DH or change the reference level (RL + AR) setting.

0552 Position underflow. Unrecoverable error. An internal motor position underflow has occurred. Recalibrate the gauge and change the reference level setting (RL + AR).

0553 Reference encoder error 1. A minimum correlation between the reference encoder table and the value, read from the actual reference encoder is not achieved. Either the stepper motor or the reference encoder is defect or filthy. Check motor and reference encoder (excessive oil ?)

0554 Reference encoder error 2. A minimum correlation between the reference encoder table and the value, read from the actual reference encoder is achieved. Either the stepper motor or the reference encoder is defect or filthy.

0555 Reference encoder error 3. Motor slack of more than ¼ the revolution appeared. Recalibrate the gauge.

0556 Calibration impossible. The combination of wire tension and displacer position makes it impossible for the SPU to move the motor and thus to check the reference encoder position. Change the motor limit switch settings, or solve the wire tension problem.

0557 The internal checksum over the exit data is incorrect. Unrecoverable error.

0601 Force transducer error 1. The frequency of the force transducer is too low.

0602 Force transducer error 2. The frequency of the force transducer is too high.

0603 On line EPROM error. Replace the EPROM. 0604 On line external RAM error. Replace the RAM chip. 0605 No wire tension. A wire rupture was detected or the motor unit

has not been unlocked or the force transducer is faulty. 0606 Coupling synchronisation error, drum slip detected. The internal

position counters do not match the actual drum position. Go into maintenance mode SM and recalibrate the gauge. Check item WT, for a SPU (without alarm relays) WT should be set to ED or EDE.

0607 Servo Auto Test failed for 3 consecutive attempts. Unrecoverable SPU error

0608 Exit data scan time out exceeded. Unrecoverable error. The XPU refused to update the motor position in its NOVRAM.

0609 Level calculation overflow. The calculated level can not be displayed. Please change the reference level setting or select another level format.

0610 Wire tension too low. The wire tension has been too low for a while. Solve the problem or change the ML setting.

0611 Wire tension too high. The wire tension has been too high for a while. Solve the problem, clean the displacer or change the ML setting.

0650 Conversion error during level calculation. Unrecoverable SPU error. A conversion from internal units to an user specified dimension has gone wrong.

0651 Divide by zero error during level calculation. Unrecoverable error. A floating point divide by zero error occurred during level calculations.

0652 Floating point overflow during level. Unrecoverable SPU error calculation.

0700 Conversion error during set point calculation. Unrecoverable SPU error. The conversion of a measured frequency, calculated weight

or measured density has gone wrong. 0701 Divide by zero error during set point. Unrecoverable SPU error.

A divide by zero situation occurred during the calculation of a set point, during a measure frequency command or during a density command.

0702 Floating point overflow error during set point calculation. A floating point overflow situation occurred during the calculation of a set point, during a measure frequency or during a density command.

0751 On line internal RAM error. 0809 Exit data updating error. Unrecoverable SPU error. The exit data

item in the SPU has not been updated for more than 20 steps. 0851 Relay 1 fail. Relay 1 has not been mounted or fails to operate

properly. 0852 Relay 2 fail. Relay 2 has not been mounted or fails to operate

properly. 0901 Divide by zero error in control routines. Unrecoverable SPU error.

A divide by zero situation occurred in a control routine. 0902 Floating point overflow error in control. Unrecoverable SPU error.

A floating point overflow situation occurred in a control routine.

Level items (854)

Item documentation

F0 (F1, F2, F3) Frequency constant 0 (1, 2, 3)

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

Hz


+.00000000E+00

F0 ... F3 are frequencies measured during calibration of the force transducer with the calibrated test weights.

• F0 : frequency constant for displacer weight = 25 grams • F1 : frequency constant for displacer weight = 100 grams • F2 : frequency constant for displacer weight = 175 grams • F3 : frequency constant for displacer weight = 250 grams

Minimum value: +.80000000E+04; maximum value: +.18000000E+05. If during initialization an error message is set in ES the values for F0 ... F3 must be checked. Measuring the frequencies F0 ... F3 must occur by the 854 itself after final assembly has taken place. For this purpose there is the command MF which can be used to measure the frequencies.

Note: The default value 0 in these items has as a consequence that immediately after initialization an error message is generated in the ES item.

FP Find reference encoder position

Type Elem.

Protection

Dimension

Entry format

Default value

C

level 2

The special command FP does not break off any active operational command. FP determines in which position the reference encoder is. It is only active when previously the maintenance mode is selected by the command SM. After the installation of a new motor block or new EPROMs, the reference encoder counter must be synchronized to the actual position of the reference encoder by means of this special command. Refer to SM and UN.

Note: After giving an FP command the gauge must be recalibrated.

FQ Frequency request

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

Hz

-.99999999E-99

Some time (5 to 25 sec.) after the command measure frequency MF, item FQ contains the measured frequency of the force transducer.

FR Freeze

Type Elem.

Protection

Dimension

Entry format

Default value

C

not protected

The Freeze command stops the motor of the 854. This situation is maintained until the user gives an unlock UN command. Refer to HC and UN.

Note: An 854 in freeze condition will not be able to change alarm status messages.

FS Fatal SPU errors

Type Elem.

Protection

Dimension

Entry format

Default value

N

no write access

00

Item FS contains the number of fatal SPU errors counted, hangups of the SPU processor detected by the XPU via the inter processor communication. Only fatal errors are counted, power downs are omitted from this item.

GD Go down

Type Elem.

Protection

Dimension

Entry format

Default value

C

level 2

The GD command sends the displacer down when the 854 is in the maintenance mode. The go down command can be broken off by a FR or a GU command. Refer to FR, GU and SM.

Note: The 854 in the maintenance mode cannot check wire tension or motor slip.

Level items (854)

Item documentation

GU Go up

Type Elem.

Protection

Dimension

Entry format

Default value

C

level 2

This command sends the displacer up when the 854 is in the maintenance mode. The go up command can be broken off by a FR or a GD command. Refer to SM.

Note: The 854 in the maintenance mode cannot check wire tension or motor slip.

HC Host command mode

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1


123BCDFILTPU (from XPU A2.0 and up)

This item can enable or disable the transmission of commands to the 854 SPU processor. Commands which are disabled are filtered by the XPU processor. If the host issues a command which is disabled by the host command mode HC, the host will receive an error message.

Position

Commands

Disabled

Enabled

1 2 3 4 5 6 7 8 9 10 11 12

interface 1 interface 2 interface 3 block calibrate dip mode freeze interface profile lock test test gauge tank profile unlock

- - - - - - - - - - - -

1 2 3 B C D F I L T P U

Note: Changes in this item will take effect immediately. No exit command is needed in this case.

I1 (I2, I3) Interface 1 (2, 3)

Type Elem.

Protection

Dimension

Entry format

Default value

C

not protected

With interface command I1, I2 or I3 the operation mode can be changed. Normally level mode I1 is active. I3 is normally used for the product-water interface. The displacer weight at the interface I1, I2, I3 is programmed in S1, S2, S3. The commands I1, I2 and I3, given from the host can be enabled / disabled with item HC. Refer to HC.

L2 (L3) Level offset for interface 2 (3)

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


+000.0000 (m)

The level offset items can be used to compensate for different submersion depths of the displacer at interface I2 and I3, compared to the submersion depth at interface I1. These offset levels will be subtracted from any calculated level if the current interface is either 2 or 3. The software checks neither for seize or sign of the level offset items.

LQ Innage servo level request

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access


@@P - - 99999999

This item contains the computed innage level with four status characters. The displacement of the displacer with respect to the internal reference level is added to the value of this RL. For a description of the 4 status bytes, refer to item QS.

The host command mode also affects the 811/813 compatible host communication. If the host sends an 811/813 compatible command record to the 854, the XPU will convert it into 854 commands. If the issued command is disabled, the host won’t receive an error massage because this is not supported by the 811/813 compatible host communication protocols.

will be converted to: 811/813 compatible enabled/disabled water measurement host request record by HC position not active active

N (block) 4 BL BL, I1 O (lock test) 9 LT LT, I1 Q (quit water) 1 - I1 T (test) 10 TG I1 U (unlock) 12 UN UN, I1 W (water meas.) 3 I3 I3

Level items (854)

Item documentation

LT Lock test

Type Elem.

Protection

Dimension

Entry format

Default value

C

not protected

After a lock test command LT the displacer is raised until the level specified in item MH is reached, or (for SPU version A2.0 and higher) the lock test limit level (item MZ) is reached. The displacer is moved up at maximum speed. If the displacer reaches the lock test limit level MZ, the command mode will change to block BL. If MH has been reached the LT will remain active and the displacer stays at the MH position. With command UN (unlock), the displacer can again be directed to another position in the tank. Refer to HC and UN.

MF Measure frequency

Type Elem.

Protection

Dimension

Entry format

Default value

C

not protected

Item FQ holds the frequency measured by the force transducer, 5 to 25 seconds after issuing the command MF. When the 854 shows FR (freeze) on the display the measurement is completed. Item WQ requests for the force exerted on the measuring wire. Once the frequency measurement has been performed, the gauge will continue with any operational command that is active. Refer to FQ, WQ.

Note: The 854 must be in freeze FR or block BL when the command MF is given.

MH Motor limit switch high level

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


+027.0000 (m)

Item MH contains the highest position allowed to the displacer during normal operation. Above the MH level the displacer can only be controlled by a CA and a GU command. When MH is reached, a status bit is set in the level status.

Note: Item MH must be defined below the physical upper part of the tank. If this is not done, the measuring wire may break as the 854 cannot react quickly enough to a too high wire tension.

ML Motor limit switch low level

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


+001.0000 (m)

Item ML contains the lowest position allowed to the displacer during normal operation. Below the ML level the displacer can only be controlled with a GD command. When the ML level is reached, a status bit is set in the level status, just like MH.

Note: Item ML must be defined above the physical bottom of the tank. If this is not done the measuring wire may run from the measuring drum.

MZ Lock test limit switch level

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1


+050.0000 (m)

Item MZ sets the highest displacer position allowed during the execution of a lock test command. When the displacer reaches this level the lock test command will be canceled and a block command will be activated. If the displacer is already on or above the MZ level when a lock test is send to the gauge, the lock test command will immediately change to a block.

Level items (854)

Item documentation

QS Servo status request

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

@@Q -

Bytes 0, 1 and 2 contain information of the status of the alarm levels, the default operation mode and other general status data. When ‘1’ the status is active, when ‘0’ the status is inactive. Byte 3 is an ASCII character that indicates the active operational command. The same four status bytes are used by data items: CQ, LQ, and UQ.

Status byte 0: Status byte 1: bit 0 : Low alarm bit 0 : Displacer movement down

1 : Low low alarm 1 : Displacer movement up 2 : High alarm 2 : On level 3 : High high alarm 3 : Test flag 4 : Motor limit switch low 4 : Calibration test successful 5 : Motor limit switch high 5 : Calibration test failed 6 : 1 6 : 1 7 : 0 7 : 0

Status byte 2: Active interface:

bit 0 : Active interface bit 0 bit 1 bit 0 Mode 1 : Active interface bit 1 0 0 I1 2 : Dipped level 0 1 I2 3 : 0 1 0 I3 4 : General fail indication 1 1 Dip 5 : No previous ST, WD or SD command 6 : 1 7 : 0

Status byte 3:

- : No command active N : Interface profile A : Balance test L : Lock test B : Block M : Measure frequency C : Calibrate R : Tank profile D : Go-down T : Test gauge F : Freeze U : Go-up

RM Wire tension during AR command

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

gram force


+.20800000E+03

Item RM is the wire tension, not compensated for springing of the magnetic coupling. Refer to AR.

S0 Last fatal SPU error

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

0000 : - - - -

This item contains the error number of the last encountered error (item ES) before the last initialization. In case of a fatal SPU error, also the address at which the error occurred is included. Examples: 0000: - - - - No error encountered after start up

0809:5A3B Fatal SPU error 809 detected at address 5A3B

S1 (S2, S3) Set point 1 (2, 3)

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

gram force


+.20800000E+03

S1 .. S3 are used to set a liquid interface level. It contains the wire tension specific for interface I1, I2, I3. The content of a set point depends on the weight, the specific mass and the shape of the displacer and, of course, on the density of the products. The set points must be entered in gf. It is not necessary to define all three set points. Minimum value: +.35000000E+02; maximum value: +.30000000E+03 . Refer to I1, I2, I3.

Level items (854)

Item documentation

SM Set maintenance

Type Elem.

Protection

Dimension

Entry format

Default value

C

level 2

SM starts the 854 SPU in maintenance mode. During SM there is no control of the reference encoder position. The user can restart the operational mode with commands SO or EX.

SO Set operational

Type Elem.

Protection

Dimension

Entry format

Default value

C

level 2

The command SO is used to leave the maintenance mode. This will cause the 854 SPU to restart in operational mode. The XPU will remain in level 2 protection.

T1 (T2, T3) Integration time 1 (2, 3)

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

seconds


+.20000000E+01

T1, T2, T3 specifies an integration time for the accompanying set point items S1, S2, S3. Minimum value: +.50000000E+00; maximum value: +.10000000E+02. Refer to items LQ, I1, I2, I3.

Note: A too long integration time can have as consequence that not only wave fluctuations are filtered out, but also that level changes are followed too slowly.

TG Test gauge

Type Elem.

Protection

Dimension

Entry format

Default value

C

not protected

The TG command performs a reproducibility test. The displacer is moved up 8 cm and returns to level. During the execution of the test gauge command the reference encoder is also checked. Refer to HC to prevent acceptation of selected operational commands. TT Tank top

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1


+027.0000 (m)

When tank top reference stop for calibration is available this position should be programmed under item TT. The tank top level is also used as the zero position for the measuring wire weight compensation.

Note: Item TT is defined as a compensated innage CQ level, the location of this level depends on HF and HL.

UN Unlock

Type Elem.

Protection

Dimension

Entry format

Default value

C

not protected

The UN command is used to break off any active operational command. After an UN command the 854 returns to the default operation mode. The unlock command will always be accepted.

UQ Ullage servo level request

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access


@@Q - - 99999999

Item UQ contains the computed ullage level. The ullage level is calculated by subtracting the innage level from the Upper reference level UR. For a description of the 4 status bytes, refer to item QS.

Level items (854)

Item documentation

WA Water measurement status

Type Elem.

Protection

Dimension

Entry format

Default value

N

no write access

-

Item WA stores the water measurement status during power down.

• W : Water measurement active • - : Water measurement not active

From XPU software version A2.0 (and later) the item also stores the command that was active before the water measurement:

character in item WA

water

measurement

last active

mode

- 1 2 3 D

not active

active active active active

N/A

interface 1 interface 2 interface 3 dip mode

WQ Weight request (displacer)

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

grams

-.99999999E-99

Upon completion of the MF command the value from WQ is processed and it contains the computed displacer weight, derived from the measured frequency FQ.

WT Wire tension protection

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

3 ASCII characters

EEE

First character

E (enable) The wire tension of the measuring wire is checked in order to prevent wire rupture. The motor will not move when the wire tension is below 20 gram or above 350 gram.

D (disable) Wire tension is not checked. Also the calibrate command CA does not operate and a CA command is internally converted to freeze FR. Second character

E (enable) Magnet slip detection will be active. D (disable) Magnet slip detection is not activated

Third character

E (enable) If this character together with the first character is set to E the wire rupture check is active. When the wire tension drops below 20 gram for more than 30 seconds a wire rupture error will be generated. A reset of the 854 resets this error. When the wire has not been repaired the 854 will generate again a wire rupture error after 30 seconds.

D (disable) The wire rupture check is disabled.

Note: For SPU boards (boards without alarm relay possibility) item WT should be set to ‘EDE’. If not: Error ES=606 can be the result.

Y4 Last valid innage level at I1

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access


@@P - - 99999999

The last valid innage level at interface 1 (item Y4) is a copy from the innage servo level item LQ. The contents of the item Y4 is copied from the LQ item whenever the 854 operates in interface 1 or dip mode and has a valid LQ item. Refer to item QS for the four bytes level status.

Level items (97x)

Item documentation

2.3 Specific 97x SmartRadar gauge items

24 Last valid ambient temperature

Type Elem.

Protection

Dimension

Entry format

Default value

N

no write access

determined by item TD

+020.00 (°C)

The ambient temperature is used in the gauge reference correction (tank shell temperature correction). Since ambient temperatures are not yet measured, the ambient temperature can only be a manual value or the Antenna Unit temperature (item RT) is used as ambient temperature. If no manual temperature value is available, the last valid value is used.

25 Last valid vapour temperature

Type Elem.

Protection

Dimension

Entry format

Default value

N

no write access


+020.00 (°C)

The vapour temperature is used in the vapour influence correction and the gauge reference correction (tank shell temperature correction). The 97x SmartRadar uses one of the following vapour temperatures (in decreasing priority):

• Actual vapour temperature : If an actual vapour temperature is available (via one of the temperature boards) • Manual vapour temperature : If no actual value is available • Last valid vapour temperature : If none of the above vapour temperatures are available

26 Last valid product temperature

Type Elem.

Protection

Dimension

Entry format

Default value

N

no write access


+020.00 (°C)

The product temperature is used in the vapour influence correction and the gauge reference correction (tank shell temperature correction). The 97x SmartRadar uses one of the following product temperatures (in decreasing priority):

• Actual product temperature : If an actual product temperature is available (via one of the temperature boards) • Manual product temperature : If no actual value is available • Last valid product temperature : If none of the above product temperatures are available

4L Level conversion decision trace

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

- - - - - - - - - - - - - - -

Each position in this item contains a flag from the level conversion process of the APU. Their meaning is:

Position Flag Mode / error Position Flag Mode / error 1 N Calculation mode normal 7 N Antenna Unit not operational

C Commissioning mode 8 I RSP init busy R Verification pin mode 9 V RSP valid level

2 A Sweep mode automatic 10 R RSP reduced accuracy M Manual sweeps 11 W RSP warning code

3 I Initialisation error 12 O RSP out of measuring range 4 H APU hardware error 13 - Not used 5 N Antenna Unit non fatal error 14 - Not used 6 R Antenna Unit reduced accuracy 15 - Not used

RSP means: Radar Signal Process. Note for positions 3 till 12: a character means ‘status active’; a dash means ‘status not active’.

Level items (97x)

Item documentation

4M Automatic gain correction switch

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

1 ASCII character

E

To prevent the 07005/6/7 warning codes, an automatic gain correction can be applied at start-up.

• E : Automatic gain correction enabled • D : Automatic gain correction disabled

When the automatic gain correction is enabled, and top and/or bottom clipping of the A-channel signal occurs, the value of item 5O (gain A-channel) is automatically adjusted. This is only done at start-up or after an EX or RS command. After initial commissioning of the SmartRadar, item 4M shall be set to ‘D’.

4P Level calculation decision trace

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

- - - - - - - - - - - - - - - - - - - - - - - - -

This item traces the decisions of the signal processing routines of the APU software. The following flags are shown:

Position Flag Contents Position Flag Contents 1 I Init status 6 R Reduced accuracy 2 F Peak found status 7 P Peak found before highest peak in bottom zone 3 A Peak accepted status 8 A Peak from normal level routine 4 B Peak in bottom zone P Peak from AdvancedDSP level routine (direct coupled) 5 O Peak in obstruction zone F Peak from AdvancedDSP level routine (filter coupled) 9 - 25 - Not used

A character means ‘status active’; a dash means ‘status not active’ (except for position 8: A, P or F).

4S 2nd Level calculation decision switch

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

10 ASCII characters

- - - - - - - - - -

This item adjust the signal processing routines to a specific environment.

Position Selection Function 1 A Waveguide mode, with XPU broadcast frequency of 2.56 Hz

B Waveguide mode, with XPU broadcast frequency of 2.00 Hz C Waveguide mode, with XPU broadcast frequency of 0.10 Hz - Waveguide / broadcast mode disabled

2 P Selection of the strongest peak reflection for level measurement - Intelligent peak detection

3 R Roof reflector installed. This excludes a ‘visible’ bottom reflection through the product - No roof reflector installed. Bottom reflection may appear behind level reflection

4 C Correction on raw samples for variation in transmitted signal strength - No correction of raw samples signal

5 F AdvancedDSP level with phase-jump filter (as from earlier APU software versions) - AdvancedDSP level follows normal level (amplitude level) as close as possible (valid from APU software version A2.4)

6 S Always 6 point level calculation used - 4 point level calculation used in bottom zone 7 F Enable preference to first peak. When this switch is set the radar prefers the first of two strong peaks instead of the last - Disables preference to first peak 8 - 10 - Not used

4U RSW (Waveguide) Radar innage

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

cm

A+9999

This data item has 6 bytes: one status byte (S), one sign byte (T) and four bytes level value in the dimension cm (independent from the setting of item LD).

Status byte (S): Sign byte (T): (space) : no error (space) : positive level value A : level error (level fail, blocked, or general APU fail) + : positive level value B : supply voltage too low - : negative level value C : level error and supply voltage too low

Level items (97x)

Item documentation

4V Level calculation decision switch

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

10 ASCII characters

- - - - - - - - - -

This item changes the signal processing algorithm to adapt specific environment conditions (double reflection detection). It also switches the reduced accuracy status if product peak enters bottom zone or obstruction zone.

Position Selection Function 1 B Reduced accuracy if peak in bottom zone

- No reduced accuracy if peak in bottom zone 2 O Reduced accuracy if peak in obstruction zone

- No reduced accuracy if peak in obstruction zone 3 D Double reflection detection switched on

- Double reflection detection switched off 4 S Reduced accuracy if level peak detected above the maximum safe fill height (item SF)

- No reduced accuracy if level peak detected above the value of SF 5 - Not used 6 - Not used 7 F Enables AdvancedDSP routines (valid from APU A1.2) P Enables restrictive AdvancedDSP routines (deviation in PSD ullage < 15 mm)

- Disables AdvancedDSP routines 8 - Not used 9 X Reduced accuracy if gauge was reset before the relation between normal level and AdvancedDSP level is established (for

W&M approved gauges; valid from APU A1.2) - Valid level condition in above mentioned situation

10 - Not used

4W Select first peak

Type Elem.

Protection

Dimension

Entry format

Default value

C

not protected

At start up, there might be a situation that there are two strong peaks at double distance, which could both be the level peak. This can be caused by: a) second peak is a strong second order echo from the level or b) the first peak is a reflection from an obstruction and second peak is from the level. In this situation, error code 70 14 is generated. The operator can now select with commands 4W and 4X which of the two peaks is the level peak:

· Command 4W selects the first peak as level peak · Command 4X selects the second peak as level peak

After issuing the 4W or 4X command, the error code 7014 changes into warning code 7014. The normal situation (no error or warning code) returns after a level change (no more double distances between the peaks).

4X Select second peak

Type Elem.

Protection

Dimension

Entry format

Default value

C

not protected

Refer to the description of item 4W.

4Y Cancel select peak

Type Elem.

Protection

Dimension

Entry format

Default value

C

not protected

Refer to the description of item 4W. Command 4Y cancels the earlier given peak selection with command 4W or 4X.

4Z Corrected position of detected peaks

Type Elem.

Protection

Dimension

Entry format

Default value

D

25

no write access


999999999

After issuing the FC command, this item contains the corrected position (distance from radar zero point) of the valid peaks in the reflection diagram. This is similar to item 5D, and in addition, all ullage values are corrected for the enabled compensations. Refer also to item 5D: position of detected peaks, and item CS: compensation switch.

Level items (97x)

Item documentation

5A Antenna offset

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access


999999999

This item represents the distance of the antenna aperture to the radar zero point (refer to fig. 2.2). The distance (AU - 5A) is the area in which the 97x SmartRadar can not detect a peak, unless the double reflection detection is enabled.

5C Number of peaks above threshold

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

00

After issuing the FC command, this item contains the number of valid peaks in the reflection diagram. One of them is selected as the product peak. The other peaks are either multiple reflections or obstructions.

5D Position of detected peaks

Type Elem.

Protection

Dimension

Entry format

Default value

D

25

no write access


999999999

After issuing the FC command, this item contains the positions (distances from radar zero position) of the valid peaks in the reflection diagram. The first element contains the distance of the level peak.

5E Amplitude of detected peaks

Type Elem.

Protection

Dimension

Entry format

Default value

D

25

no write access

dB

9999999

After issuing the FC command, this item contains the amplitudes of the valid peaks in the reflection diagram. The first element contains the amplitude from the level peak.

5G DAB software version

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

- - - - - - - - -

This item contains the software version of the DAB board, located in the Antenna Unit, or the software version of HFB-2/DAB board of the 973 SmartRadar LT. Example: DAB_A1.1 DAB software version A1.1.

5O Gain A-channel adjustment

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

sign, 1 ASCII digit

+0

With this item the gain of the Antenna channel can be adjusted. Minimum value is -7, maximum value is +7. Each step corresponds with 3.3 dB. For example: 5O is set on +3; a gain of 10 dB.

5O is set on -5; an attenuation of 16.5 dB.

5P Ambiguous init log

Type Elem.

Protection

Dimension

Entry format

Default value

N

no write access

4 ASCII characters

- - - -

Refer to the description of item 4W. This items logs the occurrence of an ambiguous init status, together with the given commands.

Position Character Description 1 E Ambiguous init situation did occur, with level fail and error code 7014

- No ambiguous init situation 2, 3, 4 F First peak is selected (command item 4W was given)

S Second peak is selected (command item 4X was given) C Cancel selection is selected (command item 4Y was selected) - No command is given yet

The positions 2, 3 and 4 show the last three commands given; latest command in position 2.

Level items (97x)

Item documentation

5Q Acceptance window expansion delay

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

2 ASCII digits

10

The acceptance window is used in the signal processing routines. The acceptance window is placed around the product peak and no peaks outside the acceptance window are accepted as new product peak. This prevents sudden level jumps. When the product peak is detected outside the acceptance window, the last valid level will be shown with reduced accuracy status. After a number of measurements (sweeps), the acceptance window will be expanded until a peak is found in the acceptance window. Item 5Q determines after how many sweeps the window starts to expand. The window will expand with each following sweep by 0.1 m.

5R Acceptance window size

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

2 ASCII digits

03

Refer to description of item 5Q. The initial size of the acceptance window can be specified with item 5R. It is expressed in Fourier distances (0.15 m). When 5R is set to 00, the acceptance window routine is disabled.

60 Antenna Unit serial number

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

- - - - - - - - - - - -

The Antenna Unit serial number (12 ASCII characters) is stored in the Antenna Unit SEEPROM, located on the HFB board. The serial number can be read to identify and verify the Antenna Unit.

7G Antenna reflection threshold

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

dB

+0090

This item contains the maximum allowed antenna aperture reflection. When the measured antenna reflection is above the threshold value, specified in item 7G, then the ‘sensor contaminated’ warning is given.

A0 Last fatal APU error

Type Elem.

Protection

Dimension

Entry format

Default value

D

10

no write access

00:00000

This item contains the error number of the last encountered fatal error before the last 10 initializations. The most recent fatal error is stored in element number one, the fatal error before the last one in element number two, etc.

Note: The format of error codes in item A0 are not the same as in item EE.

AB Adapter length

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


+000.0000 (m)

Only in cases where the planar antenna is installed inside the roof hatch or manhole trunk, the adapter length has to be set. Item AB represents the nozzle length (or length of manhole trunk). AC Averaging constant

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

2 ASCII digits

90

This item selects the value for the averaging constant in the output filter, and determines the weight of the (new) measured values from RI (radar innage) and RU (radar ullage). The formula is: (AC/100) x RI_old + (1 - (AC/100)) x RI_new. Same for RU.

Level items (97x)

Item documentation

AT Alarm test

Type Elem.

Protection

Dimension

Entry format

Default value

C

not protected

8 ASCII characters, see below

When item LE (loop check enable) is set to ‘E’ (enable), the command AT can be used to check (loop check) the four level alarms of the SmartRadar. A setting must be given with the command, which of the four level alarms is going to be checked. The specified alarm is then generated for approximately 1 minute. The AT command has to be given in the following format:

AT=aabbccdd; For example: AT= - - - - LA - - : Alarm test of low level alarm where:

aa = HH test high high level alarm cc = LA test of low level alarm - - no test of high high level alarm - - no test of low level alarm

bb = HA test high level alarm dd = LL test of low low level alarm - - no test of high level alarm - - no test of low low level alarm

The result of the alarm test can be observed on the display of the Control Unit (in display format A and B), on the indicators (if connected), on the tank inventory system, and on the external system where the alarm relays are connected (if applicable). It is recommended to check one level alarm at the time.

AU Physical antenna minimum ullage

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access


999999999

Item AU represents the required free space below the antenna aperture. For easy interpretation AU is related to the radar zero point. The distance (AU - 5A) is the area in which the SmartRadar can not detect a peak, unless the double reflection detection is enabled. Refer to figure 2.2 at the item description of item 5A.

AW APU calculation mode

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

N

This item shows the current APU mode. Default the APU is in normal mode. After issuing one of the mode switching commands, the APU switches over to that other operation mode. When the APU mode is not in normal mode, a ‘block’ status is active.

• N : Normal operation mode • C : Commissioning mode • R : Verification pin mode

AX Relay mode

Type Elem.

Protection

Dimension

Entry format

Default value

N

2

level 2


MD - - - - - - - - - -

With this item the relays on the APU board can be programmed. The item consists of two elements: element 0 for relay 1 and element 1 for relay 2. The construction of each element is:

Position Selection Description Position Selection Description 1 M Relay is mounted 7 O Relay activated if level out of range

- Relay is not mounted - Relay not activated if level out of range 2 D Relay normally de-energized 8 L Relay activated if last valid level

E Relay normally energized - Relay not activated if last valid level 3 R Relay set-up for remote control 9 R Relay activated if reduced accuracy

(via item RN) - Relay not activated if reduced accuracy - Relay set-up for level alarm 10 W Relay activated if warning

4 G Relay activated if general APU fail - Relay not activated if warning - Relay not activated if general APU fail 11, 12 HH Relay linked to HH level alarm setting

5 F Relay activated if level fail HA Relay linked to HA level alarm setting - Relay not activated if level fail LA Relay linked to LA level alarm setting

6 B Relay activated if level blocked LL Relay linked to LL level alarm setting - Relay not activated if level blocked - - Relay not linked to an alarm setting

Level items (97x)

Item documentation

AZ Antenna zone length

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


+001.0000 (m)

Refer to figure 2.3. This item selects the length of the antenna zone which Starts at the end of antenna minimum ullage (item AU).

Note: The antenna zone and bottom zone may not overlap.

B0 Last fatal Antenna Unit error

Type Elem.

Protection

Dimension

Entry format

Default value

D

10

no write access

@@ : 0000

This item contains the error number of the last encountered fatal error before the last 10 Antenna Unit initializations. The most recent fatal error is stored in element number one, the fatal error before the last one in element number two, etc.

Note: The error codes behind the colon in item B0 corresponds with item EB; the two characters before the colon are two status bytes.

BD Stilling well diameter

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

metres


+.20320000E+00

If item OM (APU operational mode) is set on “S” (stilling well measurement), item BD corrects the measured ullage for the stilling well diameter. The correction also depends on the antenna type, which is automatically detected at start-up from the antenna parameter SEEPROM on the DAB board. BD represents the internal pipe diameter (min. value: +.45720000E-01; max. value: +.33530000E+00).

BZ Bottom zone offset

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


+000.3000 (m)

With this item the start of the bottom zone, relative to tank zero, can be specified. The bottom zone ends 0.45 m (1’ 6”) under tank zero. To set this item, the distance: tank zero to tank bottom should be known. If not sure, do not alter this setting.

CH Chi of vapour

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


+.53660000E-03

This item contains the value (εr - 1) of the vapour and is used with products which exhibit a large influence on the propagation speed of the radar signal. Therefore, with this item a correction can be made.

The default value is the dielectric constant minus 1 (chi) of dry CO2 free air at 20 °Cel. and at 1 atmosphere.

CL Ullage correction table levels

Type Elem.

Protection

Dimension

Entry format

Default value

N

200

level 2


+000.0000 (m)

This item contains the ullage correction table ‘ullage’ values at which a correction value (item CW) is programmed. Item CL and CW are grouped as: CL.0.1 - CW.0.1

CL.1.1 - CW.1.1, etc. For detailed information about the correction, refer to the description of item CW.

Level items (97x)

Item documentation

CM Commissioning mode

Type Elem.

Protection

Dimension

Entry format

Default value

C

level 2

With the CM command the 97x SmartRadar enters the commissioning mode. In this mode, the measured tank spectrum is analysed and if errors are detected, they can be found in item WC (warning code). The commissioning mode must be entered to give the AR (accept reference level) command. During the commissioning mode, the APU will set a ‘block’ in the level status to signal the 97x SmartRadar is not in normal measuring mode. The commissioning mode can be left with the PM or EX command.

CS Compensation switch

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


N - - - - - - - F -

This item has ten positions. On each position a certain level compensation can be enabled or disabled. If a character is used at a certain position, that compensation is enabled. If a dash (“ - ”) is used, that compensation is disabled. Below follows a list which compensation is related to which position and which character should be used:

Position Selection Function Position Selection Function 1 N Nearby correction 6 U Ullage correction table 2 - Reserved 7 T Gauge reference correction (valid from APU A1.2) 3 - Reserved 8 H Hydrostatic deformation correction 4 R Verification pin correction 9 F Output filter

(valid from APU A1.1) A Advanced output filter (valid from APU A2.5 / B1.1)

5 G Offset and gain correction 10 - Reserved

CT Uncompensated level array

Type Elem.

Protection

Dimension

Entry format

Default value

D

20

no write access


999999999

This array of 20 levels contains intermediate results of the level calculation, which can be used in trouble shooting. The elements contain the following levels:

Element Level 0 Radar ullage (with respect to PR), corrected for refline temperature 1 Radar ullage (with respect to PR), corrected for refline temperature and stilling well diameter 2 Raw radar ullage with respect to PR 3 Raw radar ullage (with respect to PR), corrected for stilling well diameter 4 CT.1.1 5 Raw radar AdvancedDSP ullage (with respect to PR) 6 Corrected radar AdvancedDSP ullage (with respect to PR) 7 Reserved for radar AdvancedDSP ullage with vapour correction 8 Raw radar ullage, either from CT.4.1 or from CT.6.1 9 Raw radar ullage with respect to UR 10 Radar ullage (with respect to UR), corrected for verification pins (items PB and PC) 11 Radar ullage (with respect to UR), compensated for offset and gain factors (items CX and CY) 12 CT.4.1, corrected for verification pins and offset and gain factors with respect to UR (input for ullage correction table) 13 Radar ullage (with respect to UR), compensated for the ullage correction table (items CL and CW) 14 Radar level (UR - CT.13.1) 15 Radar level compensated for tank shell temperature (items SA, TV, TW, TX, WK) 16 Radar level compensated for hydrostatic deformation correction (items HF and HL)

17 CT.4.1, but compensated for ullage correction table (items CL and CW) 18 CT.5.1, but compensated for ullage correction table (items CL and CW) 19 CT.6.1, but compensated for ullage correction table (items CL and CW)

Note: Earlier APU software versions have less elements and contain different information.

CW Ullage correction table values

Type Elem.

Protection

Dimension

Entry format

Default value

N

200

level 2


+000.0000 (m)

This item contains the ullage correction to be applied by the corresponding ullage value. The ullage correction is calculated as:

where: Ullcorr. = Ullage value corrected for the ullage correction table Ull = Ullage input (CT.6.1 for APU A1.0 / A1.1 and CT.12.1 for APU A1.2 / A2.0) CW.n.1 = Ullage correction value at point n in the ullage correction table CW.n+1.1 = Ullage correction value at point n+1 in the ullage correction table CL.n.1 = Ullage value at point n in the ullage correction table CL.n+1.1 = Ullage value at point n+1 in the ullage correction table

As soon as an element of item CL is found to be zero, that is assumed to be the end of the ullage correction table. The ullages with their respective correction values are sorted first, hence it is not necessary to enter them in ascending or descending order.

Level items (97x)

Item documentation

CX Ullage gain factor

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


+.10000000E+01

Item CX is an ullage gain factor, which together with item CY (ullage offset), can be used to correct the ullage reading as follows:

Ullcorr. = Ull x CX + CY Maximum value: +.99999999E+35, minimum value: -.99999999E+35.

CY Ullage offset

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


+000.0000 (m)

Item CY is an ullage offset which can be used to compensate for the ullage reading. Refer to description of item CX.

CZ Clear min-max diagram

Type Elem.

Protection

Dimension

Entry format

Default value

C

level 2

Clears all elements of item 4T by writing 30H in them (sets 4T to default). Then new values can be stored for the min-max diagram.

EB Error DAB error request

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

9999

This item contains the most recent error encountered by the DAB board in the Antenna Unit. The error codes of the Antenna Unit are listed below: 0000 No errors encountered 0010 Initial balance adjust probably incomplete 0011 Online balance adjust probably incomplete 0015 VCO not locked at one or more samples 0050 Antenna SEEPROM can not be read 0051 Antenna parameter can not be stored 0052 Antenna Unit SEEPROM can not be read 0053 Antenna Unit parameters can not be stored 0054 Antenna Unit calibration parameters can not be stored 0055 Antenna SEEPROM is write protected 0056 Antenna Unit SEEPROM is write protected

0057 Antenna Unit calibration SEEPROM is write protected 0058 Antenna Unit calibration parameters invalid 0060 One or more of the Antenna Unit calibration parameters is

incorrect 0061 One or more Antenna Unit start-up settings is incorrect 0070 Balance could not be adjusted within 0.1 V 0080 Wrong block number in Antenna Unit calibration parameters 0081 Wrong block number in Antenna parameters 0082 Wrong block number in Antenna Unit parameters 0083 Wrong block number in Antenna Unit start-up settings 0150 APU is unable to communicate with DAB

Level items (97x)

Item documentation

EE Error APU request

Type Elem.

Protection

Dimension

Entry format

Default value

D

10

no write access

00000 : - - - -

This item contains the most recent 10 errors encountered by the APU board in the Control Unit. Some error codes contain an error counter in the field behind the colon, which counts the number of errors in a certain group. The error codes of the APU are listed below: 00000 No errors encountered 02001 Antenna Unit parameter version error 02002 Antenna parameter version error 02003 Antenna Unit parameter checksum error 02004 Antenna parameter checksum error 02005 Antenna Unit CAN protocol version error 02006 Antenna Unit non fatal error 02007 Antenna Unit fatal error 02008 RF2 sweep ratio error 02009 Radar type error (APU and DAB protocol versions do not match) 02010 Radar type selection error 02011 Number of sample error 07000 Low product reflection 07005 Top and bottom clipping raw samples A-channel (lower item 5O) 07006 Top clipping raw samples A-channel (lower item 5O) 07007 Bottom clipping raw samples A-channel (lower item 5O) 07008 DC signal on A-channel (Antenna Unit defect) 07009 No peak accepted 07014 Ambiguous init status 07052 Negative antenna aperture position 07060 Software requires RF2 type 07061 Up/down sweep only for Wave Guide type 07062 No support for 2048 samples (only with Wave Guide type) 07063 No support for 128 samples 07101 Antenna zone out of range (check items AZ and BZ) 07102 Antenna zone end before begin (item AZ<0?) 07103 Antenna zone threshold out of range 07104 Product zone threshold out of range 07106 Start bottom zone after bottom end 07107 Bottom zone threshold out of range 07110 Obstruction zone position switch 07112 Obstruction zone threshold out of range 07113 Short measuring range (bottom zone is beyond meas. range)

07170 Stilling well diameter out of range 07171 Antenna mode unknown 07172 Operation mode unknown 07173 Antenna mode / Operation mode conflict 07180 Temperatures in VCO table are all zeros 07181 Frequencies in VCO table are out of range 07182 Temperatures in VCO table are not in ascending order 07183 Sensor temperatures out of VCO table range 07186 Temperatures refline table are all zeros 07187 Temperatures refline table are not in ascending order 07188 Sensor temperatures out of refline table range 07190 VCO centre frequency out of range 07191 VCO centre frequency calibration temperature out of range 07901 Maximum safe fill (item SF) exceeded 07902 Temperature sensor error 09001 Unexpected CAN message 09002 Incomplete CAN message 09003 Wrong CAN message number 09004 CAN message with wrong Antenna Unit address 09005 Time-out CAN communication 13001 Sweep relation error 15001 CAN error interrupt 15002 CAN overrun interrupt 18001 Relay 1 error 18002 Relay 2 error 18003 Relay 1 and 2 error 21001 Last valid level time-out 21002 Calculation level time-out 21003 Ullage correction table error 21004 Verification pin table error 33001 APU ROM checksum error 34001 APU RAM checksum error 99999 Value at initialization

EK CAN communication status

Type Elem.

Protection

Dimension

Entry format

Default value

N

7

no write access

0i : 0000 (i = 1.. 7)

Each different CAN communication error is stored in a separate element of item EK. The format of each element is: xx:yyyy where: xx = error code

yyyy = error counter Element Code Description

0 01 Unexpected CAN message 1 02 Incomplete CAN message 2 03 Wrong message number of CAN message 3 04 Wrong CAN node address received 4 05 Time-out detected (after 20 seconds) 5 06 CAN error interrupt received 6 07 CAN overrun interrupt received

FA Fatal APU errors

Type Elem.

Protection

Dimension

Entry format

Default value

N

no write access

00

This item counts the number of fatal APU errors detected by the XPU-2. The maximum number is 99, which means additional errors are not registered.

FC Freeze RSP data

Type Elem.

Protection

Dimension

Entry format

Default value

C

not protected

This command takes a snapshot of all Radar Signal Processing data in the SmartRadar. After issuing this command, a complete set of RSP data will be stored in the internal RAM of the APU. This command is intended for service programs. However, it should also be issued before reading data items 5C, 5D and 5E. Wait approximately 5 seconds after issuing command FC before reading the data items.

Level items (97x)

Item documentation

FI Low product reflection warning delay counter

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1

2 ASCII digits

75

Variations in the reflected signal from the product (product reflection) can cause repetitive low product reflection warnings (warning code 07000). With item FI, a delay can be set before this warning is generated. During the delay, the last valid measured level is available. If during the delay time a valid product reflection is measured, the delay counter is reset and the measured data is available. If no valid product reflection is obtained after the delay time, a low product reflection warning is generated. The delay time is not directly in a time unit. When FI is set to 00, the delay is disabled. When FI is set to the maximum value (99), the delay time is approximately 4 minutes. Hence, the default value will cause a low product reflection warning after approximately 3 minutes. After the delay time the last valid level will be available for 30 seconds, then there will be a level fail.

LE Loop check enable

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

1 ASCII character

E

Item LE enables/disables the level alarm test with item AT.

• D : Disables level alarm test with item AT

• E : Enables level alarm test with item AT

LU Level status conversion

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


?MBC

In item LU can be specified how several status conditions of the 97x SmartRadar are converted on the Enraf field bus or RS232/485 line. If the status condition is true, the ASCII character for that condition is placed in the level status byte of the level record (B-, D-, E-, F- and L-records). The following status conditions are placed in the four positions of item LU:

Position Status condition Position Status condition 1 Reduced accuracy 3 Measurement blocked 2 Warning or APU fail 4 Out of measuring range

M5 Manual product temperature

Type Elem.

Protection

Dimension

Entry format

Default value

D

not protected


I+020.00 (°C)

The product temperature is used in vapour influence corrections and gauge reference corrections (tank shell temperature correction). If the product temperature is not measured, manual value can be programmed. The temperature value must be preceded by a status byte, indicating the validity of the manual value:

• I : Invalid value • V : Manual value active (valid)

M6 Manual vapour temperature

Type Elem.

Protection

Dimension

Entry format

Default value

D

not protected


I+020.00 (°C)

The vapour temperature is used in vapour influence corrections and gauge reference corrections (tank shell temperature correction). If the vapour temperature is not measured, a manual value can be programmed. The temperature value must be preceded by a status byte, indicating the validity of the manual value:


M7 Manual ambient temperature

Type Elem.

Protection

Dimension

Entry format

Default value

D

not protected


I+020.00 (°C)

The ambient temperature is used in gauge reference corrections (tank shell temperature correction). As the ambient temperature is not a measured value, a manual value can be programmed. The temperature value must be preceded by a status byte, indicating the validity of the manual value:


Level items (97x)

Item documentation

NT Non-Trivial ratio

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


2 ASCII digits

16

When the thresholds for the peak detection are set low, relatively weak reflections will be placed in the list of detected peaks. The Non-Trivial ratio is used to compare the listed reflections with the strongest reflection found in the list. If a reflection is weaker than the strength of the strongest peak divided by this ratio (contents of item NT), then that reflection is considered to be trivial. This discrimination method is adaptive and allows the thresholds to be set just above the noise level.

OE Obstruction zone end position

Type Elem.

Protection

Dimension

Entry format

Default value

N

10

level 2


+000.0000 (m)

With this item the end of the 10 obstruction zones can be specified. Refer to the description of item OS for more information.

OM Radar operational mode

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

1 ASCII character

F

This item determines the operational mode of the antenna and depends on the application. The following selections can be made:

• F : Free space measurement • S : Stilling well measurement

OR Offset to roof

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


+000.0000 (m)

The offset to roof is the (average) distance from the radar reference (PR) to the roof surface at the inner side of the tank. This distance is used with free space antennas, to detect if multiple reflections are due to reflections from the roof. The OR distance may be specified within 5 cm (2") accuracy.

OS Obstruction zone start position

Type Elem.

Protection

Dimension

Entry format

Default value

N

10

level 2


+000.0000 (m)

With this item the start position of obstruction zone(s) can be specified. Refer to figure 2.4. Obstruction zones can be specified to mask unwanted reflections from e.g. heating coils. First the position of the obstruction must be determined. That can be observed from a reflection diagram or read from item 5D (position of detected peaks). The obstruction positions are related to the radar zero (nozzle position). The obstruction zone length must be minimal 6 Fourier distances. There is no maximum length, as long as it is in the measuring range. The obstruction start position (item OS) is programmed as: (obstruction position - ½ obstruction length) The obstruction end position (item OE) is programmed as: (obstruction position + ½ obstruction length) Hereafter, the obstruction zone threshold value must be specified with item OT. The obstruction zones must be programmed in sequence; obstruction zone one (closest to the antenna) in the first element of items OE, OS and OT. Each obstruction zone can be individually enabled with the obstruction zone enable switch (item OZ).

OT Obstruction zone threshold

Type Elem.

Protection

Dimension

Entry format

Default value

N

10

level 2

dB

+0000.0

With this item the threshold for each obstruction zone can be specified. The maximum value is 90 dB. Refer to description of item OS.

Level items (97x)

Item documentation

OZ Obstruction zone enable / disable

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

10 ASCII characters

DDDDDDDDDD

With this item each of the obstruction zones can be individually enabled (E) or disabled (D). The first position in this item enables / disables the first obstruction zone, the second character enables / disables the second obstruction zone, etc. For detailed information about obstruction zones, refer to description of item OS.

PB Measured verification pin position

Type Elem.

Protection

Dimension

Entry format

Default value

N

5

level 2


+000.0000 (m)

The first three elements of this item are used to copy the contents of data item 5D (detected pin position peaks). The other two elements are spare and generally not used. Not used elements in item PB should be left on the default value. The data set in items PB and PC are related to each other. Therefore, maintain the relation as follows:

PB.0.1 measured verification pin position 1 with PC.0.1 physical position verification pin position 1 etc.

PC Physical verification pin position

Type Elem.

Protection

Dimension

Entry format

Default value

N

5

level 2


+000.0000 (m)

The first three elements of this item contains the “real” distance between the verification pins and the radar zero point.

PC.0.1 Physical verification pin position 1; distance from top verification pin to radar zero point PC.1.1 Physical verification pin position 2; distance from middle verification pin to radar zero point PC.2.1 Physical verification pin position 3; distance from bottom verification pin to radar zero point

The other two elements are spare and generally not used. Not used elements in item PC should be left on the default value. Based on the difference between items PB (measured) and PC (real) verification pin position, the level compensation can be performed.

PM Product measuring mode

Type Elem.

Protection

Dimension

Entry format

Default value

C

level 2

With the PM command the 97x SmartRadar can be switched back to product measuring mode after it was set to Commissioning mode or Verification pin position mode. The current mode can be read from item AW.

PP Verification pin measuring mode

Type Elem.

Protection

Dimension

Entry format

Default value

C

level 1

When this command is given to the 97x SmartRadar, the last valid level is stored and displayed with a “block” status. Then the Radar Unit should be turned (90°) into the verification pin measurement mode position. After issuing the command FC, the pin positions can be read in item 5D.

PR Position radar

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


+027.0000 (m)

The position radar is the nozzle height, with respect to tank zero, on which the Antenna is installed. During commissioning, an approximate position radar must be specified. This position can be copied from tank drawings or estimated. It must be within 1 m (3' 3") from the real position radar value. After the reference level is accepted, PR is calculated as: PR = RL + measured ullage + IO. IO are internal offsets as: antenna stem length, etc. This new calculated value for PR is then stored in NOVRAM.

QH Antenna Unit status request

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

- -

Item QH contains 2 status bytes giving status information from the DAB board in the Antenna Unit. The status bytes are bit coded and their meaning is:

Status byte 0: Status byte 1: bit 0 : SEEPROM write allowed bit 0 : Reduced accuracy

(0: protected; 1: programmable) 1 : Non fatal DAB error 1 : SEEPROM write busy 2 : Fatal DAB error

2 - 5 : 0 3 : EXT line level 6 : 1 4 : Sweep ready (if externally triggered)

7 : 0 5 : Number of ADC’s (0: 1 ADC; 1: 2 ADC’s) 6 : 1 7 : 0

Level items (97x)

Item documentation

QR Radar status request

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

À

The item QR contains two bytes status information from the APU board, bit coded.

Status byte 0: Status byte 1: bit 0 : Low level alarm bit 0 : Level fail (check item EE for more details)

1 : Low low level alarm 1 : Warning (check item WC for more details) 2 : High level alarm 2 : Last valid level used 3 : High high level alarm 3 : Reduced accuracy (check item WC for more details) 4 : General APU fail 4 : Out of measuring range 5 : Init / no previous store command 5 : Blocked 6 : 1 6 : 1 7 : 0 7 : 0

RB Radar antenna reflection

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

dB

-999999

Item RB indicates the reflection at the antenna. If the reflection exceeds a certain value, the antenna contamination condition is signalled.

RD Radar product reflection

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

dB

-999999

Item RD is the reflected signal strength from the product surface (product reflection).

RI Radar innage

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access


À+99999999

This item contains the measured innage. The innage value is preceded by the status bytes item QR.

RT Radar temperature

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access


9999999

This is the measured temperature inside the Antenna Unit, which is used for correction of the reference line length.

Note: This is not the product or the vapour temperature.

RU Radar ullage

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access


À+99999999

This item contains the measured and averaged ullage. The ullage is related to the specified upper reference value, item UR. The radar ullage is calculated as: RU = (actual ullage) - (PR - UR). The ullage value is preceded by the 2 bytes radar status.

SA Ambient air / antenna temperature selection

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

1 ASCII character

A

The ambient air temperature is used in gauge reference corrections (tank shell temperature correction). With item SA can be selected to use a manual ambient temperature value or the radar temperature value for the ambient temperature.

• A : Antenna temperature (item RT) is used as ambient temperature

• M : Manual ambient temperature, specified in item M7, is used

Level items (97x)

Item documentation

SF Maximum safe fill height

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


+000.0000 (m)

The maximum safe fill height of the tank must be entered during commissioning of the 97x SmartRadar. The 97x SmartRadar then checks, whether the maximum operating level can be measured or not. The maximum operating level should not fall within the Antenna minimum ullage area. If the maximum operating level falls within this area, then an error is given in item EE and the 97x will not become operational.

Warning: Never lower the value of the maximum safe fill height without consultation of operations.

TV Ratio vapour / ambient temperature

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


+.50000000E+00

This item is used in gauge reference corrections (tank shell temperature correction). It defines the ratio between vapour temperature and ambient temperature for the dry part of the tank shell. The temperature of the dry part of the tank shell is calculated as:

T_dry = TV x T_vapour + (1 - TV) x T_ambient

TW Ratio product / ambient temperature

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


+.87500000E+00

This item is used in gauge reference corrections (tank shell temperature correction). It defines the ratio between product temperature and ambient temperature for the wet part of the tank shell. The temperature of the wet part of the tank shell is calculated as:

T_wet = TW x T_product + (1 - TW) x T_ambient

TX Tank reference temperature

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


+020.00 (°C)

This is the reference temperature for the steel tank shell material used in gauge reference corrections (tank shell temperature correction). For more information, refer to the description of item WK.

WC Warning code

Type Elem.

Protection

Dimension

Entry format

Default value

D

10

no write access

99999

The warning code contains spectrum “errors”. When the warning bit in the radar status (item QR) is set, this item contains a spectrum warning code. This warning code is not an error. The 97x SmartRadar is fully operational, but the reflection from the tank environment shows an abnormal situation. The first element contains the most recent warning code, the second element the warning code before the last one, and so on. 00000 No warning 06001 Sweep VCO not locked 07001 Sensor contaminated 07002 Several peaks in reflection diagram 07003 Product not closest to RL 07004 Product not in RL acceptance window 07005 Top and bottom clipping raw samples A-channel (lower item 5O) 07006 Top clipping raw samples A-channel (lower item 5O) 07007 Bottom clipping raw samples A-channel (lower item 5O) 07010 Invalid sensor temperature 07011 Peak in bottom zone 07012 Peak in obstruction zone

07013 Level above measuring range (within range of item AU) 07014 Ambiguous init state (refer to items 4W or 4X) 07200 When enabling AdvancedDSP routine, level still from normal

level calculation routine (reduced accuracy condition). This is automatically corrected when the level in the tank has changed for appr. 1 metre (3 ft)

07201 No recognition of A/B-channel after start-up. This is solved when the level in the tank reaches the reference level value, or when a new RL value is entered, followed by the AR command

07202 Illegal AdvancedDSP level jump 07204 AdvancedDSP level mismatch with normal level 21005 Level above maximum safe fill

Level items (97x)

Item documentation

WK Thermal expansion coefficient of tank shell

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


+.10000000E-04

This item is used in gauge reference corrections (tank shell temperature correction). The thermal expansion coefficient of the tank shell material shall be specified in item WK. The gauge reference correction on the radar innage is calculated as:

RI_corr. = RI + (PR - RI) x WK x (T_dry - TX) + RI x WK x (T_wet - TX)

ZA Antenna zone threshold

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

dB

+0050.0 (dB)

With this item, the threshold of the Antenna zone can be set. The maximum value is 90 dB.

ZB Bottom zone threshold

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

dB

+0050.0 (dB)

With this item, the threshold of the Bottom zone can be set. The maximum value is 90 dB.

ZP Product zone threshold

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

dB

+0040.0 (dB)

With this item, the threshold of the Product zone can be set. The Product zone is that area, which is not covered by the Antenna zone, the Bottom zone and any obstruction zones. The maximum value is 90 dB.

ZY Maximum Ullage (with respect to item PR)

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

Determined by item LD

+000.0000 (m)

Valid from APU version C/D/E1.1. With this item, the maximum ullage with respect to the bottom position (item PR) can be set. Every ullage larger than (PR + ZY) will be cut off at this value. The displayed ullage will then be: PR + ZY. In this case, a reduced accuracy, out of measurement status and a 07021 warning will be issued.

877 Indicator items

Item documentation

2.4 Specific 877 Field Display & Interface items

EG Enable temperature transmission

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

1 ASCII character

E

This item enables (E) or disables (D) the 877 FDI to answer on a temperature request (C-record) addressed to the related level gauge. The relation is given by item GA. When the temperature transmission is enabled, the level as well as the temperature data can be requested at the level gauge address. For the host, it looks like the level and temperature data comes from one field instrument. When disabled, the temperature data from the 877 FDI can only be requested at the TA (transmission address) from the 877 FDI.

EN Error RPU request

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

3000

This item contains the most recent error encountered by the RPU board. The description of the error code is: 3000 No error (initializing) 3001 RPU internal RAM fail 3002 RPU external RAM fail (replace RAM chip) 3003 RPU EPROM fail (replace EPROM) 3004 Transmission relay fail 3005 Output relay 1 fail 3006 Output relay 2 fail 3009 IPC invalid number of messages 3010 AH conversion error 3020 AL conversion error 3030 DE syntax error 3040 HA conversion error 3050 HH conversion error 3060 LA conversion error 3070 LD syntax error 3080 LL conversion error 3090 UR conversion error 3100 RN syntax error

3110 RY syntax error 3120 RZ syntax error 3130 TN syntax error 3140 TM syntax error 3190 Illegal data item received 3200 Stack overflow 1; scheduling stack size error 3201 Stack overflow 2; total stack size error 3202 Unknown internal message 3203 Empty internal message queue 3204 End of EPROM reached, general software error 3205 General software trap 3301 General floating point divide by zero error 3302 General floating point overflow error 3401 Operating system time-out 3402 Operating process time-out 3403 Transmission relay process time-out 3404 Programmable relay process time-out 3405 Background process time-out

FB Fall back time-out

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

minutes

2 ASCII digits

05

If for the period of the fall back time-out, the 877 FDI has detected no field communication (thus no level and temperature could be copied), the communication line to the host will be disconnected by means of the fall back relay and the 877 FDI sends a request for level, and eventually temperature, to the level gauge. After reception of the information, the 877 FDI briefly switches over to the host lines again, to monitor for communication. If communication is detected, the fall back time-out is reset.

Note: The fall back time-out should always be set longer than the worst case scan time of the host. Else communication collisions will occur, which results in communication errors.

FL Fatal RPU errors

Type Elem.

Protection

Dimension

Entry format

Default value

N

no write access

00

This item counts the number of fatal RPU errors, detected by the XPU. The maximum number is 99; additional errors are not registered.

877 Indicator items

Item documentation

GA Gauge address

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

2 ASCII digits

99

The 877 FDI requires the level gauge transmission address, from which the level and eventually temperature must be copied. This is programmed in the item GA.

Note: The TA (transmission address) of the 877 FDI must be set on a different value than the GA.

IM Indicator mode

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

1 ASCII character; see below

F

The 877 FDI can be set to six different operation modes.

- M Master mode In the master mode, the 877 FDI will automatically scan the level gauge using the B-record. The level will be retrieved from the level gauge, which transmission address is programmed in item GA. If item TF (temperature source selection) is set to E (external), also the temperature will be scanned via the C-record.

- D Master display scan mode In the master display scan mode, the 877 FDI can retrieve one of the available display formats from the level gauge. Item RV specifies which display format will be retrieved (A - J).

- I Indicator mode In the indicator mode, the 877 FDI only copies the level and eventually temperature when the host is requesting the level (and temperature) from the level gauge. If there is no host communication, a time-out message is shown on the display.

- F Indicator and fall back mode. Functions as with the indicator mode. However, if the there is no field transmission during the fall back time-out (specified in item FB), the 877 FDI switches over to the fall back mode.

- H HTG (Hydrostatic Tank Gauge) The 877 FDI is now set for HTG and acts as an individual gauge. (item HT must be set to T)

- T Stand alone temperature gauge (only with XPU-2) In this mode, the 877 FDI is a stand alone temperature gauge for spot temperature. There is no level required for the temperature measurement.

MM Manual level

Type Elem.

Protection

Dimension

Entry format

Default value

D

not protected


9999999999

With item MM a manual level can be entered. This can be useful with an 877 FDI when there is no field transmission between level gauge and indicator. The manual level value must be preceded by the character ‘V’ (valid). If the character ‘I’ (invalid) is used, the manual level value is considered to be invalid and hence not used. The invalid status can be used to de-activate the previous entered manual level.

N0 Last fatal RPU error

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

3000 : - - - -

This item contains the error number of the last encountered error (item EN) before the last initialisation. In case of a fatal RPU error, also the address at which the error occurred is included. Examples: 3000: - - - - No error encountered after start up

3010:5A3B Fatal RPU error 3010 detected at address 5A3B

NS RPU status request

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

@

This item contains the status of the RPU and is bit coded:

Status byte: bit 0 : RPU hardware fail (other than relay fail)

1 : Transmission relay fail 2 : Programmable relay 1 fail 3 : Programmable relay 2 fail

4 - 5 : 0 6 : 1 7 : 0

877 Indicator items

Item documentation

OB Optional board selection

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


TPU

This item informs the XPU in the 877 FDI which optional board is installed. The following selections can be made:

• MPU : HCU board installed (HCU in MPU emulation mode) • HPU : HCU board installed (HCU in HPU or HSU emulation mode) • - - - : No optional board installed

RV Master mode display format request

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1

1 ASCII character

A

This item specifies the display format A, B, ... J) which will be requested when the 877 FDI is set in master display scan mode (item IM is set to D). The update scan is approximately 2 times per second.

TF Temperature source selection

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

1 ASCII character

I

Item TF is set to ‘I’ (internal) when the temperature measurement is performed by the 877 FDI. Item TF is set to ‘E’ (external) when the temperature data is retrieved from the level gauge.

TM Transmission relay mode

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1

1 ASCII character

O

In this item is specified whether the transmission relay is mounted or not.

• N : No transmission relay mounted • O : Transmission relay mounted (operational)

TN Transmission relay command

Type Elem.

Protection

Dimension

Entry format

Default value

D

not protected

D

With this item the transmission relay can be controlled and the status can be requested

Commands: • A : Activate transmission relay • D : De-activate transmission relay • X : Request for relay status; data returned in item TN (see below)

Status:

• A : Activated transmission relay • D : De-activated transmission relay • U : Unstable transmission relay • F : Fail in transmission relay • N : No transmission relay mounted

TO Level time-out

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

minutes

2 ASCII digits

03

The level time-out delay is the maximum time the 877 FDI did not receive an updated level from the field communication lines. When this period expires, the level time-out will be set on the display.

XPU items

Item documentation

3 XPU items (display, communications)

00 Reason of last initialization

Type Elem.

Protection

Dimension

Entry format

Default value

N

no write access

100 : - - - - (854 / 877) - - - : - - - - - (873 / 97x)

This item contains the error number which caused the last initialization. When this is a fatal XPU error, also the address -at which the error occurred- is included. In all other situations, the address field contains “ - - - - (-) ”.

03 NOVRAM operation error

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

1 ASCII character

@

This item contains information about the recall / store status of the NOVRAM. It is an ASCII character, which is bit coded.

• bits 0, 1 : NOVRAM recall/store status code. • bits 2 - 5 : fail during low power handling (854 only) • bit 6 : 1 • bit 7 : 0

If an illegal NOVRAM recall / store status code is detected by the XPU, error code EP014 is generated and the instrument will not be operational. The error can be reset by setting item 03 to “@”.

Note: After item 03 has been set to “@”, all NOVRAM settings must be checked.

0A (0B, 0C, 0D) Factory data string

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

8, 16 or 32 ASCII characters

all dots “.” (2EH)

These items holds factory programmed data for production and after-sales purposes. This data should not be altered, and should be reprogrammed after a NOVRAM initialization.

• 0A : product identification code (length: 32 characters); • 0B : pin code 977 TSI (854/97x) or project number (97x) (length: 16 characters); • 0C : antenna production number (97x only) (length: 8 characters); • 0D : drum identification code (854 only) or VCO production number (97x only) (length: 8 characters).

0H Enraf field bus error

Type Elem.

Protection

Dimension

Entry format

Default value

N

2

no write access

000

This item counts the number of BCC and parity errors on the Enraf field bus (bi-phase mark transmission line). With XPU-2 only.

• element 1 : number of BCC errors • element 2 : number of parity errors

For both counters, the maximum value is 999; additional errors are not counted.

0O On-line reset option board

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

1 ASCII character

D

This item enables or disables the optional board reset function when the XPU-2 is used in the 854 level gauge or 877 FDI.

• E : Optional board reset enabled When the optional board does not respond on a XPU-2 request, a separate reset signal is given to the optional board, while the XPU-2 and main board remain operational

• D : Optional board reset disabled When the optional board does not respond on a XPU-2 request, all the boards in the gauge are reset.

Note: This on-line reset option board function also requires the ‘new’ backplane and a hardware modification on the main board of the gauge.

XPU items

Item documentation

3Z Toggle display format

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

1 ASCII character

D

Only with XPU-2. This item enables or disables the automatic display scroll. When set to “E”, the XPU-2 display automatically scrolls through all display formats (A to K). Each display format is steady for approximately 5 seconds. When set to “D”, this function is disabled.

BC Address byte for CIU emulation

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

1 ASCII character: -, 0, 1, .. 9

-

Only with XPU-2. When the XPU-2 is equipped with the RS-channel, there is a direct communication link between the gauge and a system. To make use of the standard protocols, the CIU address can be emulated in the XPU-2. Item BC specifies the CIU address byte (0, 1, .. 9). When item BC is set to ‘-’, the address byte for CIU emulation is disabled.

BI Baudrate RS channel

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

bits/sec.


19K2

Only with XPU-2. When the XPU-2 is equipped with the RS-channel, item BI specifies the baudrate of the RS channel. The baudrate can be:

• 1200 : 1200 baud • 2400 : 2400 baud • 4800 : 4800 baud • 9600 : 9600 baud • 19K2 : 19200 baud

CD Display contrast

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1

2 ASCII digits

16

Item CD controls the display contrast (only on XPU-2). A number between 01 (minimum display contrast) and 16 (maximum display contrast) can be selected.

Note: The display contrast can also be controlled by the hall switches ‘U’ and ‘D’ in front of the display. Then item CD is modified.

DF Display format

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1


A

With the display format item, the data is selected which will be shown on the XPU display. Refer to display appendixes of the instruction manuals for detailed information. Below, all possible display formats are summarized:

• A : Level and temperature • B : Level • C : Average gas temperature • D : Average product temperature • E : HIMS / HTG density

• F : Pressure P1 • G : Pressure P2 • H : Pressure P3 • I : Servo density • J : Analog level output • K : Water level (on XPU-2 only)

DG Tenth millimetre selection

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

1 ASCII character

Y

When DG is set to ‘Y’, the level in display format A and B is shown with .1 mm resolution. The tenth millimetres are disabled by setting this item to ‘N’. Only the level shown on the instrument display and the PET display are affected by this item; not the level in items as LQ or RI.

XPU items

Item documentation

DJ Zero format

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

1 ASCII character

0 (zero with slash)

This item defines how the number zero is displayed. There are two selections possible:

• 0 : Zero with slash • O : Capital character O

DP Decimal separator

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

1 ASCII character

. (decimal point)

With the decimal separator item, a selection can be made what character is used as decimal separation in all measured and calculated data as: level, density, temperature, pressure. The decimal separator can be:

• . : Decimal point

• , : Comma When the decimal separator is changed, all items which holds the decimal separator must be changed as well. The XPU-2 automatically converts all items with the decimal separator. An exception on this are the items in floating point format; these will always have a decimal point.

DY Display selection

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

1 ASCII character

Y

This item enables or disables the display handling in the XPU-2 software. The display selection can be:

• Y : Display connected • N : Display not connected

Note: With an XPU-2 in a 854 XTG, the display selection must be set to: N, else error code EP004 is generated.

EJ Field communication collision counter

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1

4 ASCII digits

0000

Before the instrument transmits a message via the Enraf field bus, it checks if the field bus is free. If the field bus is not free, a transmission collision would occur. Depending on the status of the field communication collision detection item TC, the instrument will or will not transmit its message when the field bus is not free. If item TC is set to “E” (transmission collision detection enabled), and the Enraf field bus was found busy, the instrument skips its message and counter EJ is increment. If item TC is set to “D” (transmission collision detection disabled), and the Enraf field bus was found busy, the instrument transmits its message; then counter EJ is not increment. Refer to item TC. The field communication collision counter can be reset by writing ‘0000’ in it.

EP Error XPU request

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

000

This item contains the most recent error encountered by the XPU. The description of the error can be found below. Optional, the item on which an XPU error is detected, follows the error code. For instance: 071 LL : invalid decimal separator in item LL.

XPU items

Item documentation

000 No error 002 EPROM BCC error 004 Display RAM error 005 Watchdog error 006 XPU RAM error 007 NOVRAM EEPROM error 008 NOVRAM RAM error 009 NOVRAM overall BCC error 010 NOVRAM device number error 011 NOVRAM version error 012 NOVRAM item BCC error 013 NOVRAM syntax error 014 NOVRAM operation error 015 NOVRAM format error 017 NOVRAM init failed (NOVRAM size error) 018 Extended NOVRAM size mismatch 019 Extended NOVRAM checksum error 020 IPC failure 021 SPU start-up failure 022 TPU start-up failure 023 SPU and TPU start-up failure 027 MPU start-up failure 028 RPU start-up failure 029 HPU/OPU/HSU/TPU-2 start-up failure 030 Display busy time out 031 IPC echo error 032 SPU board detected 033 SPU fatal error 034 TPU board detected 035 TPU fatal error 036 Jumper setting changed 037 Display read-write error 040 Missing SPU board 041 Missing TPU board 043 Missing MPU board 044 Missing RPU board 045 Missing HPU/OPU/HSU/TPU-2 board 050 Invalid item length 051 Unknown item 052 Invalid item separator 053 Invalid data field length 054 No read access 055 No write access 056 Wrong protection level 057 Access denied 058 Command with data 060 Invalid ASCII character 061 Invalid ASCII digit 062 Invalid mantissa sign 063 Invalid decimal point 064 No E found 065 Invalid exponent sign 066 Invalid sign 067 Invalid level format 068 No quote 069 No double quote 070 Wrong selection 071 Invalid decimal separator 072 Inches overrun error 073 Fractions overrun error 074 Invalid coefficient pointer format 075 Invalid density format 076 Invalid floating point format 077 Invalid hexa-decimal character 078 Invalid manual density format 079 Invalid manual level format 080 No protection level entered 081 Command disabled by HC 082 Invalid password 083 Protected data 084 XPU error detected 085 Syntax error 086 Error: TA equal to GA 087 Invalid manual pressure format 089 Invalid pressure format 090 PET envelope error 091 PET parity error 092 PET BCC error 094 TPU board not installed 095 NOVRAM not accessible 096 Password read not allowed 100 XPU board started-up without errors (no error!) 101 Watchdog reset error 102 Instrument re-started by RS or EX command 103 Instrument re-started after SO or SM command 104 Instrument re-started after AR command

110 Missing TPU board 111 TPU start-up IPC failure 112 Watchdog frequency too high 113 Watchdog frequency too low 114 Item access disabled 115 NOVRAM syntax error 116 Invalid temperature format 117 Invalid manual vapour density format 118 Invalid level status in item MM 120 Invalid relay command 121 Invalid time data field in item RN 122 Item not available 123 MPU fatal error 124 MPU board detected 125 RPU board not installed 127 RPU start-up IPC failure 128 MPU start-up IPC failure 129 RPU board not installed 130 MPU board not installed 131 RPU board not installed 132 MPU board not installed 133 Fall back operation error 134 No transmission relay mounted 135 Wrong indicator mode 136 Main board not responding 137 Optional board not responding 147 HPU/OPU/HSU/TPU-2 fatal error 148 HPU/OPU/HSU/TPU-2 board detected 149 Missing HPU/OPU/HSU/TPU-2 board 150 HPU/OPU/HSU/TPU-2 failure 151 HPU/OPU/HSU/TPU-2 fatal error 152 NOVRAM init failed on IN command 153 NOVRAM init failed (NOVRAM size error) 154 Invalid manual density status 155 Invalid manual pressure status 156 Invalid manual vapour density status 157 Instrument re-started after IN command 160 Unknown main board item 161 Unknown optional board item 162 Main board busy 163 Optional board busy 164 Main board IPC time out error 165 Optional board IPC time out error 200 Invalid indexed item format 201 Invalid indexed item start index 202 Invalid indexed item index length 210 Invalid time format 211 Invalid manual temperature format 212 Invalid power format 220 RS232/RS485 channel framing error 221 RS232/RS485 channel parity error 222 RS232/RS485 channel overrun error 223 Enraf field bus BCC error 224 Enraf field bus parity error 225 i.s. channel BCC error 226 i.s. channel framing error 227 i.s. channel parity error 228 i.s. channel time out error 229 i.s. channel BCC error 250 EPROM checksum error 251 External RAM error 252 Internal RAM error 253 Optional board IE scan fail 254 Main board IE scan fail 255 NOVRAM data access by host 256 NOVRAM data access by PET 257 NOVRAM data access by i.s./RS232/RS485 channel 258 Invalid peak format in item 21 980 Fatal software error 981 Stack overflow 982 Stack underflow 983 Undefined opcode 984 Protection instruction fault 985 Illegal word operand 986 Illegal instruction 987 Illegal bus access 988 Inter Processor Communication error 989 Floating point error 990 Unknown fatal error 998 End of ROM 999 Fatal XPU(-2) error

XPU items

Item documentation

EX Exit

Type Elem.

Protection

Dimension

Entry format

Default value

C

level 1 / level 2

This command exits from protection level 1 or 2 and forces the initialization of all processor boards with the data stored in NOVRAM. With the initialization of all processors, it is guaranties that the data in the NOVRAM (including any changes just made) are distributed among all processors. NOVRAM changes are therefore effective only after the exit command is executed.

Note: Stored data in the NOVRAM are destroyed by the EX command.

FX Fatal XPU errors

Type Elem.

Protection

Dimension

Entry format

Default value

N

no write access

00

The item FX counts the number of fatal XPU(-2) errors. Fatal errors can be caused by:

• watchdog resets • software errors

Power downs and software resets are not included in this count. The maximum count is 99. When this count is reached, additional fatal XPU errors are omitted. GT Gauge type

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

1 ASCII character

B

The gauge type item selects which of the protocols are used with the instrument. The following selections can be made:

• B : Compatible to 811 servo gauge protocol • C : Compatible to 813 mechanical gauge converter protocol • E : Compatible to 811 servo gauge with external alarm input protocol

The option E is of no use with the 854 / 877 /97x instruments, as they have no alarm input option. Gauge type C (the 813 MGT driver) does not support the “test”, “lock test”, and “water bottom” commands. With existing Enraf tank gauging systems, the choice between gauge types B or C will merely depends upon the availability of the drivers in the Enraf system.

IN Init non-volatile data memory (NOVRAM)

Type Elem.

Protection

Dimension

Entry format

Default value

C

level 2

With this command the NOVRAM can be (re)formatted. The command must be issued three times in sequence (use for second and third time the “↑” and “return” key on the PET keyboard). Any other command, data request, or setting via PET or Enraf field bus will reset this sequence. When the NOVRAM is not accessible due to a serious NOVRAM error (i.e. overall BCC error), the IN command is not protected by protection level 2 anymore.

Note: After a (re)format all programmed NOVRAM data will be lost. The NOVRAM is loaded with default settings.

JS Jumper setting

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

This item contains the jumper setting of jumpers J1 to J7 on the XPU board and J1 to J6 on the XPU-2 and ICU board.

Jumper 1 - Protection password 1 Jumper 2 - Protection password 2 Jumper 3 - Level 2 data protection (W&M) Jumper 4 - NOVRAM init (not for 873/973) Jumpers 5, 6 (7) - Not used

A position contains an ASCII ‘1’ whenever the jumper is set to position 1, or an ASCII ‘0’ if the jumper is set to position 0. The jumper setting is only read during the initialization of the instrument (at start-up or after an EX or RS command).

XPU items

Item documentation

PD Production date

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1

4 ASCII digits

0000

This item contains the production date of the instrument, identified by a year number and a week number. Example: 9642 - produced in week 42 of 1996.

Note: If the NOVRAM is re-initialized, this value should be re-entered for service purposes.

PF Power failures

Type Elem.

Protection

Dimension

Entry format

Default value

N

no write access

0000

This item contains the number of power failures encountered by the instrument. The maximum number which this counter can hold is 9999; additional power failures are not registered.

PN Production number

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1

5 ASCII digits

00000

This item contains the production number of the instrument. The production number is a copy of the serial number of the instrument. The production number consists of five digits; the first two is the production series number, the last three figures is a sequence number. Example: 12034 - the 34th instrument of series 12.

Note: If the NOVRAM is re-initialized, this value should be re-entered for service purposes.

PO PET display format record

Type Elem.

Protection

Dimension

Entry format

Default value

D

not protected

1 ASCII character

specified by item DF

By this item, the display format on the PET display can be selected independent from the display of the instrument. The possible selections are the same as with item DF. If the PET is switched off, or disconnected, item PO is set to the same display format as specified by item DF. RH Run hours

Type Elem.

Protection

Dimension

Entry format

Default value

N

no write access

hours

00000 (XPU) 000000 (XPU-2 / ICU)

This item contains the number of hours the instrument has been operational (± 10%). The maximum value of the run hour counter is 99999 (11.4 years) for instruments with XPU(-1) board installed and 999999 (114 years) for instruments with XPU-2 and ICU board installed; more years are not counted.

Note: The value of the run hours is lost after a NOVRAM init procedure.

RS Reset

Type Elem.

Protection

Dimension

Entry format

Default value

C

not protected

Upon reception of this command, the software will perform a controlled reset. An RS command will not make operational modified NOVRAM settings.

XPU items

Item documentation

SB Sensitivity Enraf field bus line

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

1 ASCII digit (1 - 8)

8

With this item, the sensitivity of the Enraf field bus receiver on the XPU-2 and ICU board can be selected. The sensitivity can be lowered, to reduce communication errors on the transmission line due to noise. With each step (i.e. from 8 to 7), the sensitivity is reduced by a factor 2. With SB set to 8, the maximum sensitivity is selected (signals from 5 mV and more are detected). This is compatible with standard XPU board. With SB set to 1, the minimum sensitivity is selected. Then only very strong signals above 400 mV can be received.

ST Store

Type Elem.

Protection

Dimension

Entry format

Default value

C

not protected

The store command copies all computed level, temperature, density and pressure items according to their stored values. Hence the stored values reflect the computed items at the time the last store command was processed. From that moment the stored values remain unchanged until the next store command.

Value Item Stored value Stored item Innage servo level request LQ → Stored innage servo level YL Ullage servo level request UQ → Stored ullage servo level YU Comp. innage servo level CQ → Stored comp. inn. servo YC Average product temperature AP → Stored average product temperature YP Radar innage level RI → Stored radar innage YI Radar ullage level RU → Stored radar ullage YW 877 HTG innage level HQ → Stored HTG innage level YH 877 HTG ullage level VQ → Stored HTG ullage level YV HIMS / HTG density DQ → Stored HIMS / HTG density YD

Note: A Reset or Exit command or a power failure destroys all information in the stored data items.

SV Software version

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

This item contains the version numbers of the installed software and the NOVRAM. The information is given in the following sequence: device number (854, 877 or 97x), NOVRAM version, XPU(-2) version, SPU, APU or RPU version, option board version (if installed). Example: 854NVRAB3.0XPUA3.0SPUC2.1HPUA1.0

TA Transmission address

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

2 ASCII digits

00

The transmission address identifies the instrument on the Enraf field bus. Each of the instruments connected in parallel on one field bus must be programmed with a different transmission address. If the instruments are connected to an 858 CIU (Communications Interface Unit), the addresses must be:

• between 00 and 29 for field line 1 (TL 1), • between 30 and 59 for field line 2 (TL 2), • between 60 and 99 for field line 3 (TL 3).

TC Field communication collision detection enable / disable

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

1 ASCII character

E

With this item the field communication collision detection on the Enraf field bus can be enabled or disabled. The setting for TC can be:

• E : Field communication collision detection enabled. • D : Field communication collision detection disabled.

The Enraf field bus can be found busy by the influence of cross talk from other cabling. If this is the case, item TC can be set to ‘D’ (disable the collision detection) thereby enabling the instrument always to answer the data request message.

XPU items

Item documentation

TH Turn around delay host

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

0.01 seconds

2 ASCII digits

02

Only with XPU-2 and ICU board. The host turn around delay time is the time between the last received character on the Enraf field bus and the start of the transmission of the response. The possible turn around delay time settings are listed in the table below (tolerance: +10 / -0 msec). It is recommended to set the turn around delay as low as possible (minimum 10 msec.). Higher turn around delay times causes longer response time from the instrument and are generally unwanted. Only when the host systems require longer turn around delays (for instance when CIU is connected via modem to a host), then the turn around delay can be set according to the required modem turn around time (time to switch over from sending to receiving).

TH Turn around delay [msec]



01 10 07 70 40 400

02 20 08 80 50 500

03 30 09 90 60 600

04 40 10 100 70 700

05 50 20 200 80 800

06 60 30 300 90 900

TI Tank identifier

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

6 ASCII characters

- - - - - -

The tank identifier contains a 6 character name which can be assigned to the instrument. Example: TK208 In the above example, the instrument is from tank 208. This is very useful when the Enraf service program Ensite is used, with the options log file and reflection diagram. The tank identifier gives information from what tank the data is, and the tank identifier is used as filename for the log file and reflection diagram.

Note: Since the tank identifier is used as filename, it cannot contain spaces (and other non-valid characters for file specification).

TS Transmission speed

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

bits/sec.

4 ASCII digits

1200

This item contains the baud rate of the Enraf field bus. Two selections can be made:

• 1200 : 1200 baud • 2400 : 2400 baud

W1 Password 1

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1

6 ASCII characters

ENRAF1

Password 1 protects all items and commands which reside under protection level 1 from unauthorized changes. After password 1 is issued, items can be changed and commands can be issued which reside under protection level 1. When in protection level 1, the user can define his own password with item W1 (for example: W1=OWNPSW). The password can be read if jumper J1 on the XPU board is set to position 0. If jumper J1 on the XPU board is set to position 1, then the password is protected from reading. With the exit command can be returned from protection level 1.

XPU items

Item documentation

W2 Password 2

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

6 ASCII characters

ENRAF2

Password 2 protects all items and commands which reside under protection level 2 from unauthorized changes. After password 2 is issued, items can be changed and commands can be issued which reside under protection level 2. When in protection level 2, the user can define his own password with item W2 (for example: W2=PROTLV). The password can be read if jumper J2 on the XPU board is set to position 0. If jumper J2 on the XPU board is set to position 1, then the password is protected from reading. When in protection level 2, items from protection level 1 can be changed as well. With the exit command can be returned from protection level 2.

WM Weights & Measures protection

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


AAAA

Each character in this item informs the instrument which of the features are approved by the Weight & Measures authorities. At each position, there are two possibilities:

• A : Feature approved • N : Feature not approved

Position Feature

1 2 3 4

Product level Interface 1 / Interface 2 Water level Dip mode on interface 1

I1 in 854 and product level in 877 and 97x I2 in 854 (not valid in 877 and 97x) I3 in 854 (only with water probe in 877 and 97x) only with 854

When the N is selected for a feature, the level dimension and level type on the display of the instrument will be replaced by hashes ‘### ###’. This item does not affect the field communication.

XS Current XPU status

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

- - - - -

This item contains the current XPU(-2) status.

854 Level Gauge 97x SmartRadar 877 FDI

Pos. 1 O operational mode E error mode (serious XPU error detected)

Pos. 2 0 NOVRAM store disabled 1 NOVRAM enabled, exit data scan disabled 2 NOVRAM enabled, exit data scan enabled

- not used R RPU present - RPU missing

Pos. 3 S SPU present - SPU missing

A APU present - APU missing

M HCU present (in MPU emulation) - no HCU found

Pos. 4

H HCU present (in HPU emulation) M HCU present (in MPU emulation) - no option board found

H HCU present (in HPU emulation) M HCU present (in MPU emulation) S HCU present (in HSU emulation) - no option board found

- no option board found

Pos. 5 L LCD present - LCD missing

Servo density items

Item documentation

4 Optional function items

4.1 Servo density items

A1 Density correction factor 1

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


+.10000000E+01

This item is a scale factor to correct the servo density measurement in special applications. The servo density is calculation as follows:

where: Rn = measured servo density at point n (n: 0 .. 9) RF = ambient air density A1 = density correction factor 1 (scale factor) Wire tension = tension in the measuring wire, measured by the force transducer A2 = density correction factor 2 (offset factor) Minimum value: +.10000000E+00; maximum value: +.10000000E+02.

A2 Density correction factor 2

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

kg/m

3


+.00000000E+00

This item is an offset factor to correct the servo density measurement in special applications. Refer to the description of item A1. Minimum value: -.10000000E+03; maximum value: +.10000000E+03. D0 (D1 .. D9) Density innage levels

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access


A@ - 99999999

After issuing an IP command to the 854, the items D0 through D9 contain the different levels at which the corresponding densities will be measured. After issuing an TP command to the 854, the items D0 through D9 contain the midpoint of the density distances. These levels are calculated prior to the actual density measurement. Item construction: S1 S2 sign L0 L1 L2 L3 L4 L5 L6 L7

in which: S1, S2 = status bytes (see below) Sign = level sign L0 ... L7 = level format according to item LD

Status byte 1(S1): Status byte 2 (S2):

bit 0 : General fail / default setting bit 0 : Distance exceeds level Y4, DB too small (TP only) 1 : No valid Y4 level 1 : Density distance stops below DZ or EZ (TP only) 2 : Level / distance exceeds MH level 2 : No valid DK and / or DN levels (IP only) 3 : Level / distance exceeds ML level 3 : 0 4 : 0 4 : 0 5 : 0 5 : 0 6 : 1 6 : 1 7 : 0 7 : 0

Note: If any of the status bits shows a non valid value, the density measurement will not be performed.

DB Tank density profile start distance

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1


+000.3000 (m)

The DB level defines the distance between the first density measurement position and the product level. The distance should be at least 0.3 m (1 ft).

Servo density items

Item documentation

DI Density dimension

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


K

The following density dimensions are possible:

• K : kg/m3

• A : degrees API • L : lbs/ft

3

Each dimension has its own format; the formats are:

Item DI Dimension Format

K kg/m3 sign X X X X X sep X X

A degrees API sign X X X X sep X X X

L lbs/ft3 sign X X X sep X X X X

sign= + or - X = digit sep = . or ,

DK Interface density profile start level

Type Elem.

Protection

Dimension

Entry format

Default value

D

not protected


- 99999999

With the DK the start level for the interface density profile measurement can be specified. This level can be allocated to any position in the tank. The value of DK can be send to the gauge, and can be changed at any time while the gauge is operational. This item is not saved in NOVRAM during power down, RS or EX command. The DK item must be specified as an innage level. Refer to item IP.

DN Interface density profile stop level

Type Elem.

Protection

Dimension

Entry format

Default value

D

not protected


- 99999999

With the DN the stop level for the interface density profile measurement can be specified. This level can be allocated to any position in the tank. The value of DN can be send to the gauge, and can be changed at any time while the gauge is operational. This item is not saved in NOVRAM during power down, RS or EX command. The DN item must be specified as an innage level. Refer to item IP.

DO Density number of samples (per revolution)

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

1 ASCII character

F

During a BT and a TP command the apparent weight of the displacer is measured over a ‘complete’ drum revolution. With item DO a fixed number of measuring points per drum revolution can be set. We recommend to set item DO to ‘8’. Minimum value: 1; maximum value: F (15).

DV Displacer volume

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

cm

3


+.11000000E+03

The displacer volume is important with density measurement. The displaced quantity of product is made equal to the volume of the displacer. Check the engraved DV value on the displacer; this should be programmed in the instrument. Minimum value: +.10000000E+02; maximum value: +.10000000E+04

Note: In general the XPU only checks the syntax of floating point items.

DW Displacer weight

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

grams


+.22300000E+03

Item DW contains the weight of the displacer in air and is an important value for the density measurement. Check the engraved DW value on the displacer; this should be programmed in the instrument. The minimum value is: +.10000000E+03; the maximum value is: +.30000000E+03

Servo density items

Item documentation

DZ Default tank density profile stop distance

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1


+000.3000 (m)

The DZ level defines the lowest density measurement level. It is used by the TP command. This level DZ should be at least 200 mm above motor limit low ML. The DZ level can be overwritten by an EZ level. The EZ level is programmed by a Host via the Enraf field bus or the 847 PET. After power-down, a reset or an exit, the 854 automatically uses the DZ value. With SPU software versions A 2.2 / B 2.2 / C 2.2 / D 2.2 and higher, either DZ or EZ is used, depending on which is higher. The highest level is used during the TP command. Refer to EZ, TP. EZ Tank density profile stop distance

Type Elem.

Protection

Dimension

Entry format

Default value

D

not protected


This item can be programmed by Host via the Enraf field bus or via the PET, and will override the DZ value. The EZ value will not be stored in NOVRAM, and hence will be lost after a power-down, a reset or an exit. Refer to TP and DZ.

IP Interface profile density scan

Type Elem.

Protection

Dimension

Entry format

Default value

C

not protected

An IP command starts an interface profile density measurement. Upon reception of the IP command the gauge performs an average density measurement at 10 positions in the tank between the level specified in item DK and the level specified in item DN. The 10 positions are equally distributed over the specified range as shown:

- Actual level Y4 : :

- Interface profile start level DK (innage level) and first measuring position D9 - Second position D8 - Third position D7

: :

- Eight position D2 - Ninth position D1 - Interface profile stop level DN (innage level) and last position D0

The DN level must be above the motor low limit setting ML.

Note: The Items DK and DN are not stored in NOVRAM (they are data items!); hence they are lost after power down or an RS or EX command.

R0 (R1 .. R9) Measured servo density 0 (1 .. 9)

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

determined by item DI

A - 99999999

After completion of a density measurement, the measured density values are stored in the corresponding servo density items. Item construction: S0 sign R0 R1 R2 R3 R4 R5 R6 R7

in which: S0 : status byte sign : + or - R0 .. R7 : measured density value; format according item DI

Status byte S0:

bit 0 : General fail / default setting 1 : Measurement not completed 2 : 0 = tank profile (TP)

1 = interface profile (IP) 3 : No measuring point or measuring point out of range *) 4 : Conversion overflow 5 : Conversion underflow 6 : 1 7 : 0

*) When this bit is set no density measurement has been executed (see items D0 .. D9)

Servo density items

Item documentation

RF Ambient air density

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

kg/m

3


+12250000E+01

Item RF is used to correct the measured servo density when it is expressed as density in vacuum. Maximum value: +.50000000E+01. With item RF set to 0 (kg/m

3), the calculated density is in air. With item RF set to the approximate air-density, the calculated density is in vacuum.

Note: This item must always be programmed in kg/m

3, as air density can not be converted into °API.

SC Servo density request

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access


A - 99999999

Upon completion of a TP or IP command an average density will be calculated over all measured densities as stored in items R0 .. R9. The status byte ‘A’ of this item is an OR function of the status bytes of R0 .. R9 with exception of the range error bit. If one of the density status bytes (R0 .. R9) is set, this status will also be set in the status of the average density. SD Scan direction

Type Elem.

Protection

Dimension

Entry format

Default value

D

not protected

1 ASCII character

D

This item specifies the scan direction during a tank profile or an interface profile:

• D : From product surface downwards • U : From bottom upwards

TP Tank profile density scan

Type Elem.

Protection

Dimension

Entry format

Default value

C

not protected

The TP command starts a tank profile density measurement. During a TP command the gauge performs a number of density measurements over a number of ranges. These ranges are distributed over the tank as shown:

- Last valid innage I1 level Y4 - Tank profile start distance DB - Middle of 1st meas. range D9 - Middle of 2nd meas. range D8

: :

- Middle of 8th meas. range D2 - Middle of 9th meas. range D1 - Middle of last meas. range D0 - Tank profile stop level DZ or EZ - Tank zero

The DZ or EZ value should be at least 0.2 m (8") above the motor limit switch low (item ML) The positions of the measuring ranges can be calculated with Dn = DZ + ((Y4 - DB - DZ) / 9) x n with n = 0 .. 9. The range itself starts at (Dn + DC / 2) and stops at (Dn - DC / 2). All used levels are not compensated for hydrostatic deformation. If the start of the range exceeds MH or Y4 the concerning density measurement will not be performed. Refer to HC to prevent acceptation of some of the operational commands. Refer also to the SD.

WV Wire volume

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

cm

3/m


+.32000000E-01

With the WV item the volume of the measuring wire must be specified. This item is used for compensation of the submerged wire volume during the density calculation. Minimum value: +.00000000E+00; maximum value: +.10000000E+01. The default value should only be changed in case of high pressure applications (compensates hydrostatic deformation of displacer #0815.350); see table: Density [kg/m

3]

500

600

700

800

900

1000

1100

WV [cm

3/m]

+.30050000E-01

+.29660000E-01

+.29270000E-01

+.28880000E-01

+.28490000E-01

+.28100000E-01

+.27710000E-01

Analog level output items

Item documentation

4.2 Servo auto test items

PE Level at which the Servo Auto Test last failed

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1


+999.9999

This diagnostic item contains the level at which a Servo Auto Test last failed. Typically this item should have the default value. If not, then there is likely to be some sort of obstruction at the indicated level.

PL Level at which the Servo Auto Test was last executed

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1


+999.9999

This diagnostic item contains the level at which the most recent Servo Auto Test was performed.

PQ Servo Auto Test

Type Elem.

Protection

Dimension

Entry format

Default value

C

Not protected

This command starts the Servo Auto Test. The SPU will raise the displacer over a programmable distance (item SH). If the movement is not completed on time, the SPU will retry. If this second try also fails, a third and final attempt is made. Should even the third try fail, the SPU will invalidate the measurement readout, the measurement unit and the measurement mode. After that the SPU will go into General Fail mode and item ES (Error SPU) is set to the value 607 (Servo Auto Test failed for three consecutive attempts). From this moment on the SPU will only respond to status requests and the reset command (item RS). Constraints: - Item SE must be set to 'E' (enabled) - The gauge must be either in block mode (item BL) or measuring level at the same interface specified at positions 3+4 of item ER - If the gauge is measuring level, then the level must be stable. (if the level is not stable, measurement unit and measurement type will show exclamation marks) - No other operational command may be active. A list of operational and special commands is shown in the Unlock command UN.

PX Minimum level at which the Servo Auto Test was performed

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1


+999.9999

If not modified by the user, this diagnostic item contains the lowest level at which a Servo Auto Test has been performed since NOVRAM initialization.

PY Maximum level at which the Servo Auto Test was performed

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1


+000.0000

If not modified by the user, this diagnostic item contains the highest level at which a Servo Auto Test has been performed since NOVRAM initialization.

PZ Highest number of Servo Auto Test retries

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1

0

If not modified by the user, this diagnostic item contains the highest number of retries observed during a Servo Auto Test since NOVRAM initialization.

SE Servo Auto Test enabled

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1

1 ASCII character E

With the Servo Auto Test enable/disable item set to 'E' (enabled) the 854 level gauge will automatically start a Servo Auto Test within 1 minute after tank loading has stopped. Furthermore, when the liquid level in the tank is stable, Servo Auto Tests will be executed at regular intervals (configurable by means of item SI). With the Servo Auto Test enable/disable item set to 'D' (disabled) there will be no automatic Servo Auto Tests at all. The operator can however start a Servo Auto Test manually by entering the PQ command on the portable ENRAF terminal (PET).

Servo auto test items

Item documentation

SH Servo Auto Test raise height

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1


+000.0200

When the liquid level in a tank is stable and item SE is set to 'E', Servo Auto Tests will be executed at regular intervals. With item SH the operator can configure the height over which the displacer is raised during the Servo Auto Test.

SI Servo Auto Test interval time

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1

minutes

00060

When the liquid level in a tank is stable and item SE is set to 'E', Servo Auto Tests will be executed at regular intervals. With item SI the operator can configure the time between two consecutive Servo Auto Tests.

SN Number of executed Servo Auto Tests

Type Elem.

Protection

Dimension

Entry format

Default value

N

no write access

00000

This diagnostic item contains the total number of Servo Auto Tests performed since NOVRAM initialization. When the maximum value of 99999 is reached, the item restarts counting at 00001.

SQ Servo Auto Test status

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

0

This command is used by the XPU to monitor the progress of a Servo Auto Test that is being executed by the SPU. The response to this command can be one of: 0: IDLE 1: 1

st attempt

2: 2nd

attempt 3: 3

rd attempt

D: DENIED (because not "on level" or an arbitrary command is active) F: FAIL S: SUCCESS

SY Servo Auto Test invalidate display and level

Type Elem.

Protection

Dimension

Entry format

Default value

N

Level 2

N

Servo auto tests are typically executed when the gauge is measuring level at interface 1, 2 or 3 or when the gauge is in block [BL] mode. During a Servo Auto Test, when item [SY] set to 'N' (no)

- An asterisk ('*') will be shown on the same position where normally the arrow up/down symbols are displayed. During a Servo Auto Test, when item SY set to 'Y' (YES)

- An asterisk ('*') will be shown on the same position where normally the arrow up/down symbols are displayed. - Both the measurement unit and the measurement type will be set to exclamation marks. - All level related GPU records will be invalidated. - SPU items like QS, LQ, UQ and CQ are unaffected.

SZ Time elapsed since last Servo Auto Test

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

minutes

00000

This diagnostic item contains the number of minutes that has elapsed since the most recent Servo Auto Test successfully completed.


Item documentation

XI Servo Auto Test level movement sample interval

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1 seconds

60

With the Servo Auto Test enable/disable item SE set to 'E' (enabled) the 854 level gauge will automatically start a Servo Auto Test within 1 minute after tank loading has stopped. The movement detector samples the level in the tank at regular intervals. The operator can configure the time between two consecutive samples by means of item [XI].

XT Servo Auto Test level movement trip distance

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1


+000.0030

With the Servo Auto Test enable/disable item SE set to 'E' (enabled) the 854 level gauge will automatically start a Servo Auto Test within 1 minute after tank loading has stopped. The movement detector samples the level in the tank at regular intervals. If the absolute difference between two samples exceeds the trip distance given in item XT, then the tank is considered to be loaded or unloaded.


Item documentation

4.3 Analog level output items

A3 (A4) Analog output calibration value

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1

mA


+.00000000E+00

These items are used to calibrate the analog output of the HCU / ICU_HPO. The correct value for A3 is obtained by sending command item A5 after which the current output (approximately 4 mA) is measured with a digital mA meter. The measured value must be programmed in item A3. The correct value for A4 is obtained by sending command item A6 after which the current output (approximately 18 mA) is measured with a digital mA meter. The measured value must be programmed in item A4.

A5 (A6) Analog output calibration command

Type Elem.

Protection

Dimension

Entry format

Default value

C

level 1

These command items are used to calibrate the analog output of the HCU / ICU_HPO. See item description for items A3 and A4.

Note: With the 97x SmartRadar (ICU_HPO board), these commands can only be issued via the HART I/O line.

AE Analog output calibration & overwrite

Type Elem.

Protection

Dimension

Entry format

Default value

D

level 1

mA


+.00000000E+00

For 97x SmartRadar only. This item can be issed by the PET and is used to calibrate and/or overwrite the analog output of the ICU_HPO. This item is a combination of items A5, A6 and AF. For calibrating the 4 mA output, set item AE to: +.40000000E+01 and read the current output (approximately 4 mA) which is measured by a digital mA meter. The measured value must be programmed in item A3. For calibrating the 18 mA output, set item AE to: +.18000000E+02 and read the current output (approximately 18 mA) which is measured by a digital mA meter. The measured value must be programmed in item A4. For manually overwrite the output current, set item AE to the desired value (minimum value: +.35000000E+01; maximum value: +.22000000E+02). The output current holds the value till another value is given by item AE or an EX command (for leaving protection level 1). It is not required to set item AK to ‘O’ or ‘P’.

AF Analog output overwrite

Type Elem.

Protection

Dimension

Entry format

Default value

D

not protected

mA


With this item the user can manually overwrite the current output. The item AK must be set to overwrite mode. Minimum value: +.35000000E+01; maximum value: +.22000000E+02. Refer also to items AK, AO and AQ.

Note: With the 97x SmartRadar (ICU_HPO board), this item can only be issued via the HART I/O line.


Item documentation

AK Analog output mode

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1


D

Via this item is selected under what conditions the analog output current will operate.

Item AK Valid level

Invalid level Level fail Time-out / start-

up

D Analog output

disabled

O P Io = <AF>

(overwrite mode)

Io = 3.5 mA

Io = 22 mA

(during start-up) (during start-up)

If no <LV>

L M

Io = <AL>

Io = <LV>

Io = 3.5 mA

Io = 22 mA

Io = 3.5 mA

Io = 22 mA

A B Io = <AL>

Io =

Io =

3.5 mA 22 mA

I J

Io = <AL>

Io = 3.5 mA

Io = 22 mA

AM Analog 4 mA level

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1


+000.0000 (m)

This item must be programmed with the level value which corresponds with an output current of 4 mA.

Note: With the 97x SmartRadar it is possible to write a value for PV LRV with the HART communicator, which will then be used instead of item AM.

AN Analog 20 mA level

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1


+027.0000 (m)

This item must be programmed with the level value which corresponds with an output current of 20 mA.

Note: With the 97x SmartRadar it is possible to write a value for PV URV with the HART communicator, which will then be used instead of item AN.

AO Actual analog output current

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

mA

The level gauge will respond with the actual current value. In this way the actual current can be checked. Refer to item AQ for the analog output status byte, preceding the current value. Example: @+.12345000E+02 (12.345 mA).

Note: With the 97x SmartRadar (ICU_HPO board), this item is not available. The current can be read with a HART communicator connected to the HART I/O line.

<AF> = value given by item AF in analog output overwrite mode <AL> = actual level value <LV> = last valid level value

Io = output current (3.5 mA ≤ Io ≤ 22 mA)

Note: With the 97x SmartRadar (ICU_HPO board), the setting ‘D’ (analog output disabled) should not be used. Then the analog output reacts the same as item AK is set to‘I’.


Item documentation

AQ Actual analog output status

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

This item reflects the status of the analog output. The reply of the level gauge consists of one ASCII character which must be decoded into bits (see appendix A: ASCII table). b7 b6 b5 b4 b3 b2 b1 b0 Bits b7 - b5 are: 0 1 0 ; bit b4 represents the value status and bits b3 - b0 the output status.

Output status (b3, b2, b1, b0): b3 b2 b1 b0

Analog output status

Setting of item AK

Error code on display

0 0 0 0 0 0 0 1 0 0 1 0 0 0 1 1 0 1 0 0 0 1 0 1 0 1 1 0 0 1 1 1 1 0 0 0 1 0 0 1 1 0 1 0 1 0 1 1 1 1 0 0 1 1 0 1

valid product level used last valid product level used invalid level used no valid product level available no last valid level available no level available level time-out invalid level level failure analog output general fail analog output disabled overwrite value used no overwrite value available calibration mode entered

L, M, A, B, I, J L, M A, B I, J L, M A, B L, M, A, B, I, J I, J A, B, I, J - - D O, P O, P L, M, A, B, I, J

- - LV IL NL NL NL TO IL LF FL DA OV NV CA

AV Measure analog output command

Type Elem.

Protection

Dimension

Entry format

Default value

C

not protected

This item gives a command to the HCU to measure several analog test voltages. The measured voltages can be read via items VP and VV.

Note: With the 97x SmartRadar (ICU_HPO board), this command is not available. Refer to items OA and OF.

EA Error analog output request

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

2200

As reply to this item the most recent encountered error by the HCU will be echoed. The possible errors are:

xx00 No error, value at initialisation xx20 DAC read back error xx15 Not calibrated (check items A3 and A4) xx99 Option board not mounted xx16 Upper / lower range error

xx = 22 MPU emulation mode xx = 30 HCU mode

Note: With the 97x SmartRadar (ICU_HPO board), this data item is not available. Refer to items OA and OF.

FO Communication board fatal error counter

Type Elem.

Protection

Dimension

Entry format

Default value

N

no write access

00

Only valid with 97x SmartRadar. This item counts the number of fatal ICU_HPO errors. The maximum count is 99, additional errors are not registered.

Value status (b4): 0 : within 4 - 20 mA range 1 : out of 4 - 20 mA range

Note: With the 97x SmartRadar (ICU_HPO board), this data item is not available. Refer to items OA and OF.


Item documentation

OA Communication board actual status

Type Elem.

Protection

Dimension

Entry format

Default value

D

not protected

5 ASCII characters

- - - - -

Only valid with 97x SmartRadar. This item holds the actual status of the ICU_HPO board, 30 seconds after startup (power on, EX or RS command). The first 30 second after startup, this item contains the ICU_HPO software version. The possible error codes / status messages are:

OK000 no error encountered ER021 not calibrated (items A3 and/or A4 are zero) ER010 ICU (XPU-part) not found ER030 NOVRAM checksum error ER011 ICU (XPU-part) not responding ER031 NOVRAM access error ER012 ICU (XPU-part) answer with error ER040 code checksum error ER020 DAC error ER050 RAM error

OF Communication board last encountered fatal error

Type Elem.

Protection

Dimension

Entry format

Default value

N

no write access

0000

Only valid with 97x SmartRadar. This item holds the last encountered fatal error code of the ICU_HPO board. The possible error codes are:

0000 no error encountered 1nnn CMX errors 2nnn program errors 3nnn interrupt errors 4nnn watchdog error where nnn is a unique number in the program code.

VP Value pointer

Type Elem.

Protection

Dimension

Entry format

Default value

D

not protected

2 ASCII digits, point, 2 ASCII digits

99999

Via this item a value pointer is set. The requested date, after issuing command AV, of this pointer can then be read in item VV. VP Selected value pointer 00.00 HCU/ICU_HPI emulation & function 00.01 Configuration boot code 00.02 HCU/ICU_HPI hardware version 00.03 Boot code software version

Note: A certain delay between loading the value pointer (item VP) and the pointer value request (item VV) should be kept. This to allow the HCU to do the necessary calculations. This data item is not available in the 97x SmartRadar (ICU_HPO board). Refer to items OA and OF.

VV Pointer value

Type Elem.

Protection

Dimension

Entry format

Default value

D

not protected

V

99999999999999

Via this item the requested date, selected by item VP, can be read.

Note: A certain delay between loading the value pointer (item VP) and the pointer value request (item VV) should be kept. This is to allow the HCU to do the necessary processing. This data item is not available in the 97x SmartRadar (ICU_HPO board). Refer to items OA and OF.

Spot temperature items for HCU and ICU_HPI

Item documentation

4.4 Spot temperature items for HCU and ICU_HPI

AP Average product temperature

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access


0F@@9999999

Item AP gives the measured spot temperature value, preceded by 4 status bytes. For the status bytes, refer to the description of item MQ.

EM Error HCU / ICU_HPI request

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

2800 / 3000

This item contains the most recent temperature error from the HCU or ICU_HPI board. xx00 No error; value at initialization xx10 Counter error Hardware error. Reset instrument; if error persists, replace HCU or ICU_HPI board xx15 UTI time-out Possibly no supply on Spot circuit (blown fuse); replace HCU or ICU_HPI board xx29 R_cable error Resistance of B- and C- wire too high (maximum loop resistance: 24 Ω) xx30 Connection error Check the wiring connections Of RTD to instrument xx34 R_test error Hardware error. Reset instrument; if error persists, replace HCU or ICU_HPI board xx70 Wrong element configuration specified Check item MN (must be set to ‘03’ or ‘04’) xx98 No temperature sources found No RTD (and no VITO temperature probe) connected xx99 Spot option print not installed Change HCU or ICU_HPI board for the correct type xx: 28 for HSU / TPU-2 emulation 30 for HCU emulation

FH Fatal HCU / ICU_HPI errors

Type Elem.

Protection

Dimension

Entry format

Default value

N

no write access

00

This item counts the number of fatal HCU / ICU_HPI errors detected by the XPU processor. The maximum number is 99, which means additional errors are not registered.

H0 Last fatal HCU / ICU_HPI error

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

000 : 000

The first three bytes contains the last fatal error number which occurred just before the HCU / ICU_HPI board became inaccessible for the XPU. The last three bytes are not used.

MI Switch hysteresis

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


+000.1000 (m)

Item MI is a hysteresis around the switch point of the RTD position (item MO). The spot temperature will be measured if the product level is above the value (MO + MI). When the product level is below the value of item MO, a status bit is set in item MQ and the temperature status on the instrument display is set to: “LR”

MN Element configuration

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

2 ASCII digits

16

Item MN indicates in which way the temperature element is connected. This can either be a 3- or 4- wire configuration, indicated by respectively ‘03’ or ‘04’ in item MN.

Note: A 4-wire measurement is not available with the HCU board. For 4-wire measurement, strap ST4 on the ICU_HPI board has to be set to the correct position.


Item documentation

MO RTD position

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


+000.0000 (m)

This item indicates the mounting position (height) of the RTD with respect to the zero point of the level gauge. If the level drops below this value, a status bit is set in item MQ and the temperature status on the display is set to: “LR”.

MQ Temperature status request

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

0F@@

This item contains status information of the temperature measurement. The status information is bit coded and consists of 4 bytes. Status byte 0 is always “0”

Status byte 1: Status byte 2: bit 0 : General HCU / ICU_HPI temp. fail bit 0 : Last valid level used

1 : Fail in spot temperature reading 1 : Manual level used 2 : 1 2 : Level time-out 3 : Product level below RTD position 3 : 0 4 : 0 4 : 0 5 : 0 5 : Temperature out of range 6 : 1 6 : 1 7 : 0 7 : 0

Status byte 3:

bit 0 : No previous store command 1 - 5 : 0

6 : 1 7 : 0

MT Temperature element type

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


TPL

Item MT specifies the type of temperature element connected to the HCU / ICU_HPI. The following selections can be made:

• SPL : For a Pt100 element; measuring range: -200 to +250 °C • SNI : For a Ni191 element; measuring range: -20 to +120 °C

MU Test resistance

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

ohm

99999999999999

Item MU gives the measured test resistance of the optional HCU and ICU_HPI boards. This resistance value should read: +.16650000E+03 (166.5 Ω ) ±0.03%.

TD Temperature dimension

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

1 ASCII character

C

The temperature dimension can be set to:

• C : Temperature in degrees Celsius • F : Temperature in degrees Fahrenheit

If the temperature dimension is changed, all temperature related items must be recalculated to the new temperature dimension. If a XPU-2 is installed, this will be done automatically.


Item documentation

TU Temperature status conversion

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

1 ASCII character

T

If the temperature status is considered as a reduced or not guaranteed accuracy condition, then the character in this item is used in the temperature status byte on the Enraf field bus to the host. It depends merely on the host, which character is accepted in the temperature status field. A “T” is generally accepted by Enraf tank inventory systems to indicate the reduced accuracy condition. The temperature status is to be considered with reduced accuracy when:

• Temperature is out of range • Level is below RTD position • Level time-out on HCU / ICU_HPI board

VP Value pointer

Type Elem.

Protection

Dimension

Entry format

Default value

D

not protected


99999

The VP item consists of 4 positions, separated in the middle: v w . x y (or: v w , x y). This item, together with item VV, makes it possible to request several important calculation results. By means of the value pointer, a vector can be loaded to the temperature board. Then, with item VV, the selected value is returned. The following pointer values for temperature measurement with the HCU / ICU_HPI board can be requested:

v w

.

x y

Selected value

Dimension

0 0 0 0 0 0 0 0

0 1 0 1 0 1 0 1

. . . . . . . .

0 0 0 1 0 2 0 3

0 0 0 1 0 2 0 3

HCU / ICU_HPI Emulation & Function Configuration boot code HCU / ICU_HPI hardware version Boot code software version Measured spot resistance Calculated spot temperature Measured cable resistance Temperature update counter

Ω

according to item TD Ω

Example: VP = 01,00 (value pointer for requesting the element resistance) VV (Item VV holds the requested element resistance)

VV Pointer value

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

determined by item VP

99999999999999

Item VV holds the measuring value, selected by the value pointer item VP. For the contents of this item, refer to the description of item VP.

YP Stored temperature

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access


0F@A9999999

This item contains the ‘stored’ temperature value (item AP), at the time the store command (ST) was issued. The stored temperature value is preceded by the 5 status bytes from item MQ.

Average temperature items

Item documentation

4.5 Average temperature items (VITO-MTT-LT-MRT)

AG Average gas temperature

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access


IF@@9999999

For 863 MRT (Variable Length Thermometer): The average gas temperature is obtained by computing the non-immersed part, minus length of item MG, from the longest element. For 76x VITO probes / 361 MPT (Multiple Pt100 element): The average gas temperature is calculated by taking the average value of the spot elements in the gas phase. A spot element is considered to be in the gas phase, if it is located above the product level + the gas immersion depth (item MG). A spot element is not anymore in the gas phase if it is located above the product level + the gas immersion depth (item MG) - the switch hysteresis (item MI). For the description of the 4 status bytes, refer to tem MQ.

AP Average product temperature

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access


IF@@9999999

For 863 MRT (Variable Length Thermometer): The average product temperature is calculated from the resistance of the longest immersed element. The longest immersed element is selected for the average product temperature if the level is above the element length + offset (item MO) + product immersion depth (item MP). For 76x VITO probes / 361 MPT (Multiple Pt100 spots): The average product temperature is calculated by taking the average value of the immersed spot elements. A spot element is considered to be in the product, if it is at least immersed for the product immersion depth (item MP). A spot element is not anymore in the product if it is located above the value of: product level minus product immersion depth (item MP) plus switch hysteresis (item MI). For the description of the 4 status bytes, refer to item MQ).

EM Error HCU / ICU_HPI request

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

2200 (in MPU emulation) 2400 (in HPU emulation) 3000 (in HCU emulation)

This item contains the most recent temperature error encountered by the HCU / ICU_HPI board. xx00 No error, value at initialization xx11 No reply on initial HART commands (check wiring between

VITO Interface and instrument) xx50 Spot error 0 xx51 Spot error 1 xx52 Spot error 2 xx53 Spot error 3 xx54 Spot error 4 xx55 Spot error 5 xx56 Spot error 6 xx57 Spot error 7 xx58 Spot error 8 xx59 Spot error 9 xx60 Spot error 10 xx61 Spot error 11 xx62 Spot error 12 xx63 Spot error 13 xx64 Spot error 14 xx65 Spot error 15

xx70 Sub system error (data from 762 VITO Interface not available; reset instrument or replace VITO Interface)

xx71 Wrong probe connection (check probe wiring or isolation resistance VITO probe towards ground too low)

xx72 Not supported element type (check item MT) xx73 Wrong element configuration (check item MN) xx77 Wrong Pt100 connection (76x probes: check red and brown

wires of Pt100 reference element) xx80 R_test error (reset instrument or replace VITO Interface) xx81 R_cable error (check resistance of black wires MRT / MPT

element or isolation resistance probe towards ground too low) xx84 Standard deviation too large (EMC influence; check cable

shields or replace VITO Interface or isolation resistance probe towards ground too low)

xx91 Wrong element position table (check items J0 .. JD) xx92 No data available (check wiring between VITO Interface and

instrument, replace VITO Interface or HCU / ICU_HPI board) xx98 No temperature sources found (no VITO probe connected)

xx = 22 for MPU emulation xx = 24 for HPU emulation xx = 30 for HCU emulation


Item documentation


Type Elem.

Protection

Dimension

Entry format

Default value

N

no write access

00

This item counts the number of fatal HCU / ICU_HPI errors, detected by the XPU software. The maximum count is 99, additional errors are not registered.


Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

000 : 000

The first three bytes contains the last fatal error number which occurred just before the HCU / ICU_HPI board became inaccessible for the XPU.

J0 (J1 .. JD) MRT element lengths / MPT element positions

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


+000.0000 (m)

With MRT elements (Variable Length Thermometer): When item MJ is set to ‘T’ (configurable element lengths), the element lengths of the MRT can be specified in items J0 .. JD. Item J0 for element 0, item J1 for element 1, etc. With MPT elements (Multiple Pt100 spots): When item MJ is set to ‘T’ (configurable element positions), the element positions of the MPT can be specified in items J0 .. JD. Items J0 .. JD represents the distance from the bottom of the probe (nearest to tank zero level) to the TRD elements. Item J0 for element 0, item J1 for element 1, etc. The configurable element lengths / element positions are only effective, when selected by item MJ (Multi element distribution).

MG Gas immersion depth

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


+000.1000 (m) for 877 +000.5000 (m) for 854, 97x

Distance MG is introduced to reduce the heat-transfer (via thermo-well) on the spot just above the product interface. Refer to the description of item AG.

MI Switch hysteresis

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


+000.1000 (m)

To prevent erratic readings by the on/off switching of spots / elements due to small level variations, a switch hysteresis is incorporated in selecting the spots / elements.

MJ Multi temperature distribution

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

1 ASCII character

F

This item determines whether fixed element lengths / positions are taken or configurable element lengths / positions via items J0 .. JD.

• Set to ‘F’: Fixed element lengths / positions • Set to ‘T’: Configurable element lengths / positions (as per items J0 .. JD)

Note: Fixed or configurable element lengths are applicable on 863 MRT elements (Variable Length Thermometer); Fixed or configurable element positions are applicable on 361 MPT elements (Multiple Pt100 spots). The fixed element lengths are: 0.25 m (only for MRT with spot element) – 0.65 m – 1.25 m – 1.95 m – 2.85 m – 4.15 m – 5.65 m – 7.35 m – 9. 25 m – 11.65 m – 14.65 m – 18.45 m – 22.95 m – 29.65 m.


Item documentation

MK Sensitive length

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


+030.0000 (m)

For 864 MTT: MK is the sensitive length which is used for calculating the distance between the spots (MK/15). With the standard MTT, the sensitive length = overall length - 700 mm. The sensitive length is engraved in the top fitting of the MTT. For 76x VITO probes: MK is the length from the reference element (Pt100) up to the highest element. With the 764/767 VITO temperature probes the reference element is located at 1 m from the bottom of the probe. With the 766/768 VITO combi probes, the reference element is located above the water probe. Refer to table below:

VITO probe model Sensitive length (item MK)

Element spacing Offset to bottom of probe (item MO) + distance: tank zero – bottom of probe

****764C<ol><he> ****764D<ol><he> ****767C<ol><he> ****767D<ol><he>

<he> – 1 m <he> – 1 m <he> – 1 m <he> – 1 m

MK/15 MK/14 MK/8 MK/7

1 m 0.065 m 1 m 0.065 m

*A**766C<ol><he> *A**766D<ol><he> *A**768C<ol><he> *A**768D<ol><he>

<he> – 1 m <he> – 1 m <he> – 1 m <he> – 1 m

MK/15 MK/14 MK/8 MK/7

1 m 0.065 m 1 m 0.065 m

*B**766C<ol><he> *B**766D<ol><he> *B**768C<ol><he> *B**768D<ol><he>

<he> – 1.5 m <he> – 1.5 m <he> – 1.5 m <he> – 1.5 m

MK/15 MK/14 MK/8 MK/7

1.5 m 0.065 m 1.5 m 0.065 m

*C**766C<ol><he> *C**766D<ol><he> *C**768C<ol><he> *C**768D<ol><he>

<he> – 2.5 m <he> – 2.5 m <he> – 2.5 m <he> – 2.5 m

MK/15 MK/14 MK/8 MK/7

2.5 m 0.065 m 2.5 m 0.065 m

Note: In the model selection code given in table above an asterisk ‘*’ represents any character, the notation <ol> means: overall length (4 figures, positions 9-12 of Model Selection Code, units: cm) and the notation <he> means: position of highest element (4 figures, positions 13-16 of Model Selection Code, units: cm).

MN Number of elements

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

2 ASCII digits

16

For VITO MRT Interface: Item MN specifies the number of elements (inclusive the spot element). The maximum number of elements which can be connected is 14 (i.e. 14 elements from an MRT without spot element, or 13 elements from an MRT element with spot element and 14 elements with a 361 MPT element). In case two or three individual spot elements are connected to the VITO MRT Interface, item MN becomes 02 or 03. For VITO MTT / LT Interface: The number of elements (spots) for a 764/766 VITO probe is: 16. The number of elements (spots) for a 767/768 VITO probe is: 09. Although the number of elements is automatically detected by the HCU / ICU_HPI software, item MN must be set to the correct value in case temperature profiles are used in the Tank Gauging System.

MO Temperature element level offset

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


+000.0000 (m)

Distance MO defines the position of the lower end of the temperature probe with respect to the zero-level of the tank. Refer to the table at the item description of item MK for the internal VITO probe offset, which must be added to this figure as well. For innage measurement, the switching level = actual level - MO; for ullage measurements, the switching level = MO - actual level (this is exclusive the distances MP and MI).

MP Product immersion depth

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


+000.5000 (m)

Distance MP is introduced to reduce the heat-transfer (via thermo-well) on the spot just below the product interface. Refer to the description of item AP.


Item documentation

MQ Temperature status request

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

IF@@

This item contains 4 bytes with temperature status information.

Status byte 0: Contains the character: 0 - F (for 764/766 VITO probes), indicating the highest immersed spot element of the VITO probe; 0 - 8 (for 767/768 VITO probes), indicating the highest immersed spot element of the VITO probe;

0 - D (for 863 MRT), indicating the longest immersed element of the MRT (Variable Length Thermometer) 0 - D (for 361 MPT), indicating the highest immersed element of the MPT (Multiple Pt100 spot)

At start-up, this is: I (initializing).

Status byte 1: Status byte 2: bit 0 : General temperature fail bit 0 : Last valid level used

1 : Fail in average product temperature 1 : Manual level used 2 : Fail in average gas temperature 2 : Level time-out 3 : Level exceeds lowest element / spot 3 : Device not calibrated (76x VITO probe only) 4 : Level exceeds highest element / spot 4 : Exceeding differential temp. range (76x VITO probe only) 5 : Element / spot fail (one or more elements / spots defect) 5 : Out of specified temperature range 6 : 1 6 : 1 7 : 0 7 : 0

Status byte 3:

bit 0 : No previous store command 1 : Alternative (lower) element selected (MRT only)

2 - 5 : 0 6 : 1 7 : 0

MT Temperature element type

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


TPL

Item MT specifies the type of element connected to the 762 VITO Interface. For 76x VITO probes (with 762 VITO MTT/LT Interface) the element type is: TPL For 361 MPT probes (Multiple Pt100 spots) (with 762 VITO MRT Interface) the element type is: SPL For 863 MRT (with 762 VITO MRT Interface) the 3 byte code (C3 C2 C1) for the element type has the following meaning:

C3 R refers to an MRT without spot element Q refers to an MRT with spot element

C2 C1 CB Cu90 Beacon MRT; Rth = 90.2935 + T x 0.38826

1)

CN Cu90 Nulectrohm MRT; Rth = 90.4778 + T x 0.3809 1)

CS Cu90 spot; Rth = 90.5 + T x 0.3873 1)

PL 2) Pt100 large range (-200 to +250 °C)

PS 2) Pt100 small range (-20 to +120 °C)

NI 2) Ni191 (-20 to +120 °C)

1) T is temperature in degrees Celsius; the temperature range for all copper elements is: -100 to +280 °C.

2) From HCU / ICU_HPI software version A1.9 and higher.

MU Test resistance

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

ohm

99999999999999

This item contains the measured test resistance used in the 762 VITO Interface. The value of this test resistor should be: 166.5 Ω ± 0.03% (displayed as: +.16650000E+03; standard floating point format).

MW MTT wiring connections

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

16 ASCII characters

0000000000000000

For 76x VITO probes only: When one (or more) of the elements must be disabled from the average temperature calculation, set the desired position in item MW to a hexa-decimal value other than ‘0’. For instance: disable the lowest spot element: set item MW to: “F000000000000000”.


Item documentation

TD Temperature dimension

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

1 ASCII character

C

The temperature dimension can be set to:

• C : Temperature in degrees Celsius • F : Temperature in degrees Fahrenheit

TU Temperature status conversion

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

1 ASCII character

T

The character “T” (default setting) in this item is used in the temperature status byte in the field communication to indicate a reduced or not guaranteed temperature accuracy. Other characters can be used, if the host system accepts them. The status byte is set if:

• Out of specified temperature range • Exceeding differential temperature range (VITO probes only) • Device not calibrated (VITO probes only) • Last valid level used • Manual level used • Level below lowest element • Alternative element selected (MRT only)

U0 (U1 .. UF) Calculated position of spot element 0 (1 .. F)

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access


IF@@ <level>

For 863 MRT: As the maximum number of elements for an MRT is 14, only items U0 .. UD are used. These items contain the calculated element lengths from the 863 MRT with respect to the lower end of the MRT. The distance of items MO, MI, MG and MP are not yet taken into account in items U0 .. UD. The table below gives the fixed element lengths (item MJ=F) for MRT with spot element (MT=QXX) and MRT without spot element (MT=RXX).

Element MT = QXX MT = RXX Element MT = QXX MT = RXX

U0 0.25 (m) 0.65 (m) U7 7.35 (m) 9.25 (m)

U1 0.65 (m) 1.25 (m) U8 9.25 (m) 11.65 (m)

U2 1.25 (m) 1.95 (m) U9 11.65 (m) 14.65 (m)

U3 1.95 (m) 2.85 (m) UA 14.65 (m) 18.45 (m)

U4 2.85 (m) 4.15 (m) UB 18.45 (m) 22.95 (m)

U5 4.15 (m) 5.65 (m) UC 22.95 (m) 29.65 (m)

U6 5.65 (m) 7.37 (m)

Example:

MO = 0.3 m, MP=0.5 m, MI=0.1 m. Element U4 (for an MRT with spot element) switches on at the level of: 2.85 + 0.3 + 0.5 = 3.65 m.

For 361 MPT: As the maximum number of elements for an MPT is 14, only items U0 .. UD are used. These items contain the calculated element positions from the 361 MPT with respect to the lower end of the MPT. The distance of items MO, MI, MG and MP are not yet taken into account in items U0 .. UD. For 76x VITO probes: These 16 items contains the calculated positions of the spot elements from the 76x VITO probe. The distances of items MO, MI, MG and MP are not yet taken into account in items U0 .. UF. For details on the status bytes, refer to item MQ.

V0 (V1 .. VF) Spot temperature 0 (1 .. F)

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access


IF@@9999999

For 863 MRT: These 13 items contains the temperature values of the individual elements. For 864 MTT & 764 VITO: These 16 items contains the temperature values of the individual spot elements. For details on the status bytes, refer to the description of item MQ.


Item documentation

VP Value pointer

Type Elem.

Protection

Dimension

Entry format

Default value

D

not protected


99999

The VP item consists of 4 positions, separated in the middle: v w . x y (or v w , x y). This item, together with item VV, makes it possible to request several important calculation results. By means of the value pointer, a vector can be loaded to the HCU and ICU_HPI board. Then, with item VV the selected value is returned. For the temperature part of the HCU and ICU_HPI board, the following pointer values can be requested:

For 76x VITO probes:

v w . x y Selected value Dimension / value

0 0 0 0 0 0 0 0

0 2 0 2 :

0 2 0 2 0 2 0 2 0 2 0 2

0 3 0 3 0 3 0 3 0 3 0 3 0 3

.

.

.

. . . . . . . . . . . . . . . .

0 0 0 1 0 2 0 3

0 0 0 1 :

1 5 2 0 2 5 2 6 2 7 2 8

0 1 0 3 0 9 1 0 1 1 1 2 2 0

HCU / ICU_HPI Emulation & Function Configuration boot code HCU / ICU_HPI hardware version Boot code software version Calculated temperature of spot connected to CN1A-1 Calculated temperature of spot connected to CN2B-1 : Calculated temperature of spot connected to CN5A-1 Measured Pt100 resistance Standard deviation V_test Leak current I1

Leak current I2 Error counter HART addresses 3, 4 and 5 Error counter HART addresses 6, 7 and 8 Detected HART device addresses Initial detected VITO device type Real active functions of VITO Interface Actual executed HART commands from 762 VITO Interface Averaging constant 762 VITO Interface

according to item TD according to item TD according to item TD Ω <0.5E-10 V A A 762 VITO-MTT: HART address is: 5 762 VITO-LT HART address is: 6 5 for VITO-MTT; 6 for VITO-LT

For MRT / MPT:


0 0 0 0 0 0 0 0

0 2 0 2 :

0 2 0 2 0 2 0 2 0 2 :

0 2

0 3 0 3 0 3 0 3 0 3

.

.

.

. . . . . . . . . . . . . .

0 0 0 1 0 2 0 3

0 0 0 1 :

1 3 2 6 2 9 8 2 8 3 :

9 5

0 1 0 9 1 0 1 1 1 2

HCU / ICU_HPI Emulation & Function Configuration boot code HCU / ICU_HPI hardware version Boot code software version Calculated temperature of first element Calculated temperature of second element Calculated temperature of fourteenth element Standard deviation Calculated I_ref Calculated resistance first element Calculated resistance second element : Calculated resistance fourteenth element Error counters HART addresses 3, 4 and 5 Detected HART device addresses Initial detected HART device type Real active functions of VITO Interface Actual executed HART commands from 762 VITO Interface

according to item TD according to item TD according to item TD <0.5E-10 1.0275 mA ±0.05 Ω Ω Ω 762 VITO-MRT: HART address is: 5

Example: VP=02.20 (Value pointer for requesting the Pt100 element resistance)

VV (Item VV holds the requested Pt100 element resistance)

VV Pointer value

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access


99999999999999

Item VV holds the measured value, selected by the value pointer item VP. For the contents of this item, refer to description of item VP.

YP Stored average temperature

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access


IF@A9999999

This item contains the ‘stored’ average product temperature value from item AP, at the time an ST command was issued. The stored average product temperature value is preceded by the 5 status bytes from item MQ.

HIMS / HTG items

Item documentation

4.6 HIMS / HTG items

28 Last valid density

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


+00000.00 (kg/m

3)

This item contains the last valid density calculated by the HCU / ICU_HPI option board, or contains the manual density.

29 Last valid P3

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

determined by item PI

+000000.0 (Pa)

This item contains the last valid pressure P3 measured by the HCU / ICU_HPI option board, or contains the manual P3 value.

DD Manual density

Type Elem.

Protection

Dimension

Entry format

Default value

D

not protected


9999999999

With item DD a manual density can be programmed. The density value must be preceded by one character:

• I : Invalid • V : Valid

The ‘V’ denotes an actual manual value for the density that is transferred to item 28. The ‘I’ denotes an invalid manual density value and then DD is not used for item 28.

DI Density dimension

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

1 ASCII character

K


• K : kg/m3

• A : degrees API

• L : lbs/ft3

When item DI is changed, all density items must be converted to the new dimension and new format. With the XPU-2, that will be done automatically. Each dimension has its own format; the formats are:

Item DI Dimension Format

K kg/m3 sign X X X X X sep X X

A degrees API sign X X X X sep X X X

L lbs/ft3 sign X X X sep X X X X

sign = + or - sep = . or , X = digit

Items, from which the format depends on the density dimension, are: 28, DL, DU, HD.

HIMS / HTG items

Item documentation

DL Density lower limit

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1


+00000.00 (kg/m

3)

With item DL a low density limit can be programmed. If the calculated density is lower than the set point given in item DL, a status bit is set in item QF (hydrostatic status request) and the character L is set in the status byte of the density item QQ. To prevent on/off switching of the of the low density alarm status, a density alarm hysteresis is implemented (item HD). Only for HTG with 877 FDI: If, at start-up of the 877 FDI, a low density alarm exists, the 877 FDI concludes that the level is too low for a proper density calculation out of P1 and P2. Then the last valid density (item 28), or the manual density (item DD) is used in stead of the calculated density.

DQ Hydrostatic density request

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access


A@@PH999999999

With item DQ, the calculated density can be requested. If no valid calculated density is available, the last valid density (from item 28) or the manual density (from item DD) will be used. The density value is preceded by the 5 status bytes from item QF. With HIMS, the density is calculated as: P7 / (level - LP) / LG + RF (kg/m

3)

With HTG, the density is calculated as: P8 / LS / LG (kg/m3)

DU Density upper limit

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1


+00000.00 (kg/m

3)

With item DU a high density limit can be programmed. If the calculated density is higher than the set point given in item DU, a status bit is set in item QF (hydrostatic status request) and the character H is set in the status byte of the density item QQ. To prevent on/off switching of the of the high density alarm status, a density alarm hysteresis is implemented (item HD).

EH Error HCU / ICU_HPI request

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

2400 (for HPU emulation) 2800 (for HSU emulation) 3000 (for HCU emulation)

Item EH contains the most recent error encountered by the HCU / ICU_HPI board. The error codes mean: xx00 No error, value at initialisation xx11 Pressure transmitter 1; no reply on initial HART commands (check wiring) xx12 Pressure transmitter 2; no reply on initial HART commands (check wiring) xx13 Pressure transmitter 3; no reply on initial HART commands (check wiring) xx35 Pressure transmitter 1; wrong Primary Value dimension (must be: kPa) xx36 Pressure transmitter 2; wrong Primary Value dimension (must be: kPa) xx37 Pressure transmitter 3; wrong Primary Value dimension (must be: kPa) xx99 Option print not installed xx = 24 HPU emulation xx = 28 HSU emulation xx = 30 HCU emulation


Type Elem.

Protection

Dimension

Entry format

Default value

N

no write access

00

This item counts the number of fatal HCU or ICU_HPI errors. The maximum count is 99. When this count is reached, additional fatal errors are not registered.


Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

000 : 000

The item H0 contains a combined error code. The first 3 bytes represents a fatal HCU / ICU_HPI error code before it came in fault condition. Report the contents of item H0 to Honeywell Enraf for clarification.

HIMS / HTG items

Item documentation

H1 (H2, H3) Maximum trip pressure P1 (P2, P3)

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1


+000000.0 (Pa)

This item is used to set a maximum trip pressure of a pressure transmitter. When the measured pressure exceeds the programmed maximum trip pressure, a status bit is set in item QF (hydrostatic status request).

Note: Pressure transmitter P2 is not present in a HIMS configuration. However, H2 needs to be set to the correct format when the pressure dimension is changed. This also applies for H3 when P3 is not present in a HIMS/HTG configuration.

HD Density alarm hysteresis

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1


+00005.00 (kg/m

3)

The item HD is used to set an alarm hysteresis around the density alarm levels (DL and DU).

HE HART communication errors

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

000 : 000 : 000 : 000

This item contains error counters for the communication errors with the pressure transmitters for the HCU or ICU_HPI -board.

The first, second and third counter refer to P1, P2 and P3 (note: P2 is absent in a HIMS configuration). The fourth counter refers to an optional HART® transmitter

(i.e. external water probe). The maximum count for each counter is 999; additional errors are not registered. With an RS or EX command, the counters are reset.

HQ Hydrostatic level request

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access


A@@PH999999999

With this item, the calculated HTG level can be requested. The level value is preceded by 5 status bytes from item QF. The level can be calculated in the following cases:

• From P1, P2 and P3 (level status is valid) • From P1, P2 and a manual or last valid P3 (P3 is absent or defective) • From P1, P3 and a manual or last valid density (P2 is absent, defective or level is below LN)

• From P1, a manual or last valid P3 and a manual or last valid density (P2 and/or P3 are absent or defective, and/or level is below LN)

• From P2, P3 and a manual or last valid density (P1 is absent or defective) • From P2, a manual or last valid P3 and a manual or last valid density (P1 and P3 are absent or defective)

Only in the first case the level is valid, in all other situations the hydrostatic level status (item QF) and the level status byte in the level record hold a message about the condition.

HT HIMS / HTG selection

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

1 ASCII character

I

This item is used to select the required HIMS or HTG configuration.

• I : HIMS • T : HTG

HIMS / HTG items

Item documentation

IF Hydrostatic deformation factor

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

mm/m


+.00000000E+00

For HIMS configuration: Item IF is used to compensate the programmed distance P1 - zero level tank (item LP) for the hydrostatic tank deformation. The compensation becomes effective above the level, programmed in item IL (hydrostatic deformation level). The hydrostatic deformation compensates distance LP as given in the following formula:

LPcomp. = LPprogr. - (level - IL) x IF where:

LPcomp. = LP compensated for hydrostatic tank deformation

LPprogr. = the programmed value for LP IL = hydrostatic deformation level (item IL)

For HTG configuration: Item IF is used to compensate the programmed distance P1 - P2 (item LS) for the hydrostatic tank deformation. The compensation becomes active above the level, programmed in item IL (hydrostatic deformation level). The hydrostatic deformation compensates distance LS as given in the following formula:

LScomp. = LSprogr. + (level - IL) x IF where:

LScomp. = LS compensated for hydrostatic tank deformation

LSprogr. = the programmed value for LS IL = hydrostatic deformation level (item IL)

If the user does not wish to use the hydrostatic tank deformation compensation, item IF must be set to zero (the default setting).

IL Hydrostatic deformation level

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


+002.0000 (m)

Item IL holds the level above which the hydrostatic tank deformation compensation becomes effective. Refer to the description of item IF.

IT Integration time

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1

seconds


+.20000000E+02

The item IT is used to set the integration time of the moving average filter on the measured pressure values. The relation of IT and the recursive equation is as follows: where:

Pai+1 = average pressure value after the ith

measurement

Pi = pressure value of the ith

measurement

Pai = average pressure value after the (i -1)th

measurement

tµp = time needed by the HCU / ICU_HPI board to process the data (appr. 5 seconds)

HIMS / HTG items

Item documentation

LG Local gravity

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

m/s

2


+.98128800E+01

Item LG contains the local gravity acceleration which is used to correct the calculated density for the local gravitation differences. The gravity depends on the ellipsoidal latitude of the place on earth and the height above sea level. The international Gravity Formula (adopted in 1930 by the International Association of Geodesy) is:

g = 978.049 x (1 + 0.0052884 x sin2ß - 0.0000059 x sin

2(2ß)) - 0.3086 x h

The gravity formula according to Dutch NMi (Weights & Measures) is:

g = 978.032 + 5.18596 x sin2ß - 0.00574 x sin

2(2ß) - 0.3086 x h

where:

g = normal gravity acceleration [cm/s2]

ß = ellipsoidal latitude [°] h = height above sea level [km]

LM Distance P3 - zero level tank

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


+025.0000 (m)

Item LM is used for compensation of (P1-P3) for the weight of the ambient air and the product vapour in the tank. If there is no P3 installed on the tank (atmospheric application), LM can be set to the value of the Upper Reference Point (item UR).

LN Minimum HIMS / HTG level

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


+003.5000 (m)

The minimum HIMS/HTG level is used to decide whether the calculated HIMS/HTG density or the last valid density is used. If the level in the tank falls below the minimum HIMS/HTG level, the "stored" last valid density is used in the data items DQ and QQ (this will be of course signalled in the status bytes of both items). In HTG configurations also the level status is influenced (items HQ, VQ and the status in the level record).

LP Distance P1 - zero level tank

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


+001.0000 (m) with 854, 97x +030.0000 (m) with 877

This item holds the distance between the ‘zero’ line of pressure transmitter P1 and the zero point (datum plate) of the tank. This item is required in HIMS configuration to calculate the density and in HTG configuration to calculate the level.

LS Distance P1 - P2

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


+002.0000 (m)

This item contains the distance between the ‘zero’ line of pressure transmitters P1 and P2. Distance LS is used in HTG level and density calculations.

LU Level status conversion

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

1 ASCII character

? (with 877)

In HTG configuration, the level status conversion is used to indicate a ‘reduced accuracy’ condition of the calculated level. In case of such a reduced accuracy, the ASCII character specified in item LU, is placed in the level status byte of the level record. Most Honeywell Enraf Tank gauging systems accept “?” as a reduced accuracy condition. With the following conditions, the contents of item LU is placed in the level status:

• Manual or last valid P3 used • Manual or last valid density used (not for HTG without P2) • Manual vapour density used • Level below distance LN

HIMS / HTG items

Item documentation

M1 (M2, M3) Minimum trip pressure P1 (P2, P3)

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1


+000000.0 (Pa)

This item is used to set a minimum trip pressure of a pressure transmitter. When the measured pressure falls below the programmed minimum trip pressure, a status bit is set in item QF (hydrostatic status request).

Note: Pressure transmitter P2 is not present in a HIMS configuration. However, M2 needs to be set to the correct format when the pressure dimension is changed. This also applies for M3 when P3 is not present in a HIMS/HTG configuration.

N1 (N2, N3) Serial number pressure transmitter P1 (P2, P3)

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

9999999999

This item is used to request the serial number from the pressure transmitter via command #16 or via command #0 (HART® pressure transmitters).

O1 (O2, O3) Pressure offset P1 (P2, P3)

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


+000000.0 (Pa)

The pressure offset can be used for “zero calibration” of the pressure transmitter. The offset value is subtracted from the measured pressure.

P0 Manual pressure P3

Type Elem.

Protection

Dimension

Entry format

Default value

D

not protected


9999999999

With item P0 a manual vapour pressure (P3) can be programmed. The manual vapour pressure value must be preceded by a character indicating the status.

• I : Invalid value • V : Valid P0 value

The valid manual P3 value will be used in item 29. If there is a valid P3 value from the pressure transmitter, then the manual value is not used any more.

P1 (P2, P3) Measured pressure of pressure transmitter P1 (P2, P3)

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access


A@@PH999999999

This item contains the measured pressure value of pressure transmitter P1 (P2, P3). The pressure value is preceded by the 5 status bytes from item QF.

P4 Pressure (P1 - P3)

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access


A@@PH999999999

Item P4 contains the calculated value from P1 - P3 pressure. This can only be calculated when P1 is present. The pressure value is preceded by the 5 status bytes from item QF.


Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access


A@@PH999999999

Item P5 contains the calculated value from P1 - P2 pressure. This can only be calculated when P1 and P2 are present. The pressure value is preceded by the 5 status bytes from item QF.


Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access


A@@PH999999999

Item P6 contains the calculated value from P2 - P3 pressure. This can only be calculated when P2 is present. The pressure value is preceded by the 5 status bytes from item QF.

HIMS / HTG items

Item documentation

P7 Pressure (P1 - P3)compensated

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access


A@@PH999999999

Item P7 holds the pressure (P1 - P3) compensated for ambient air density and tank gas density.

P7 = (P1 - P3) - (LM - level) x RG x LG + (LM - LP) x RF x LG The pressure value is preceded by the 5 status bytes from item QF.


Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access


A@@PH999999999

Item P8 holds the pressure (P1 - P2) compensated for ambient air density density.

P8 = (P1 - P2) + LS x RF x LG The pressure value is preceded by the 5 status bytes from item QF.


Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access


A@@PH999999999

Item P9 holds the pressure (P2 - P3) compensated for ambient air density and tank gas density.

P9 = (P2 - P3) - (LM - level) x RG x LG + (LM - LP - LS) x RF x LG The pressure value is preceded by the 5 status bytes from item QF.

PA Available pressure transmitters

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

3 ASCII characters (1, 2, 3 or )

123

The contents of item PA informs the HCU / ICU_HPI (software) which pressure transmitters (hardware) are installed. A number means: the pressure transmitter is present; a ‘’ means: the pressure transmitter is absent.

PH Pressure alarm hysteresis

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1


+000160.0 (Pa)

The item PH is used to set a hysteresis around the minimum and maximum trip pressures (items H1, H2, H3, M1, M2 and M3) to prevent the on/off switching due to variations in the pressure measurement.

PI Pressure dimension

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


P


• P : Pa (maximum range: 999 kPa • I : psi (maximum range: 99 psi) • K : kPa (maximum range: 9.9 MPa) • S : psi (maximum range: 999 psi)

When item PI is changed, all pressure items must be converted to the new dimension and new format. With the XPU-2, that will be done automatically. Each dimension has its own format; the formats are:

Item PI Dimension Max. Range Format

P Pa 999 kPa sign X X X X X X sep X

K kPa 9.9 MPa sign X X X X sep X X X

I psi 99 psi sign X X sep X X X X X

S psi 999 psi sign X X X sep X X X X

sign = + or - sep = . or , X = digit Items, from which the format depends on the pressure dimension, are: 29, H1, H2, H3, M1, M2, M3, O1, O2, O3, P0 and PH.

HIMS / HTG items

Item documentation

Q1 (Q2, Q3) Temperature pressure transmitter P1 (P2, P3)

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access


9999999

With item Q1, Q2 and Q3, the temperature of pressure transmitter P1, P2 and P3 can be requested.

Note: This is not the product temperature, neither the ambient temperature! Not all types of HART

® pressure transmitters are supporting the sensor temperature.

QF Hydrostatic status request

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

A@@PH

The item QF consists of five bytes status information, bit coded. The format of these bytes are:

Status byte 0: Status byte 1: bit 0 : General HCU / ICU_HPI fail bit 0 : P1 exceeds min./max. trip pressure

1 : Low level alarm *) 1 : P2 exceeds min./max. trip pressure 2 : Low low level alarm *) 2 : P3 exceeds min./max. trip pressure 3 : High level alarm *) 3 : Exceeding range P1 4 : High high level alarm *) 4 : Exceeding range P2 5 : Level time-out

#) 5 : Exceeding range P3

6 : 1 6 : 1 7 : 0 7 : 0

Status byte 2: Status byte 3:

bit 0 : Fail P1 bit 0 : Last valid density used 1 : Fail P2 1 : Manual density used 2 : Fail P3 2 : Density high alarm 3 : Manual P3 used 3 : Density low alarm 4 : Last valid P3 used 4 : HTG level fail 5 : Manual level used

#) 5 : No previous store command

6 : 1 6 : 1 7 : 0 7 : 0

Status byte 4:

bit 0 : Manual gas density used 1 : Level below LN 2 : Last valid level used

#)

3 : Invalid level reading #)

4 : °API underflow / overflow or negative density 5 : 0 *) HTG only; should be ignored with a HIMS configuration.

6 : 1 #) HIMS only; should be ignored with an HTG configuration.

7 : 0

QQ Abbreviated hydrostatic density request

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access


F999999999

The abbreviated density request contains the density data, similar as with item DQ, however, the data is preceded by only one status byte. The status byte can be one of the following characters: -, L, H, S, &, T, E, or F, depending on the situation as described in the table below:

Status byte

Description of status Status byte

Description of status

F General HCU / ICU_HPI fail or fail in P1/P2/P3 or °API underflow/overflow or negative density

S Level time-out, or last valid P3 - or last valid density - or last valid level used, or level below LN or invalid level reading

E Exceeds pressure range P1/P2/P3 H High density alarm

T Exceeds trip pressure P1/P2/P3 L Low density alarm

& Manual P3 or manual level or manual density or manual gas density used

- Valid density status

HIMS / HTG items

Item documentation

RF Ambient air density

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

kg/m

3


+.12250000E+01

Item RF is used to correct the calculated density when it is expressed as density in vacuum. Maximum value: +.50000000E+01. With item RF set to 0 (kg/m

3), the calculated density is in air.

With item RF set to the approximate air-density, the calculated density is in vacuum.


3, as gas and air densities can not be converted into °API.

RG Tank gas density

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

kg/m

3


+.12500000E+01

Item RG is used to correct for the vapour above the product and should be set to the approximate density of the gas/vapour mixture in the tank.

If the product density is calculated in air (RF is set to zero), then RG should contain the relative gas density (relative to the density in air: RGrel = RG - RF).



RJ Manual tank gas density

Type Elem.

Protection

Dimension

Entry format

Default value

D

not protected

kg/m

3


999999999999999

With this item, a manual gas density can be programmed. The value of the manual tank gas density is equal to the value given with item RG. The difference with item RG is: no protection level. The manual tank gas density is preceded by one status character:

• V : Valid manual tank gas density value • I : Invalid manual tank gas density value

If the I (invalid manual tank gas density status) is used, RG will be used for the tank gas density.



SR Stop HART communication

Type Elem.

Protection

Dimension

Entry format

Default value

C

level 2

With the SR command the HART® communication between the HCU / ICU_HPI board and the connected (pressure) transmitters can be stopped. All transmitters

will be regarded as absent and the corresponding bits will be set in the hydrostatic status request bytes (fail P1, P2, P3). The communication will be resumed after the HCU or ICU_HPI is reset (with an EX or RS command).

This command should be used when another instrument wants to be master on the HART® communication lines (e.g. a HART

® Communicator).

Note: With the HCU and ICU_HPI boards, the HART

© communication on both channels is stopped.

VP Value pointer

Type Elem.

Protection

Dimension

Entry format

Default value

D

not protected


99999

The VP item consists of 4 positions, separated in the middle: v w . x y (or v w , x y). This item, together with item VV, makes it possible to request several important calculation results. By means of the value pointer, a vector can be loaded to the HCU and ICU_HPI board. Then, with item VV the selected value is returned. For the pressure part of the HCU and ICU_HPI board, the following pointer values can be requested:


0 0 0 0 0 0 0 0

0 3

0 3 0 3

.

.

.

. . . .

0 0 0 1 0 2 0 3

0 0

0 1

0 9

HCU / ICU_HPI Emulation & Function Configuration boot code HCU / ICU_HPI hardware version Boot code software version Error counters HART addresses 0, 1, 2 (for P1: counter 1, for P2: counter 2) Error counters HART addresses 3, 4, 5 (for P3: counter 0) Detected HART device addresses (1 for P1; 2 for P2; 3 for P3)

VV = 0000:0000:0013 VV = 0000:0000:0000 VV = 1 - 3 - 5 - - - - - - - - -

Example: VP=03.09 (Value pointer for requesting the detected HART device addresses) VV (Item VV holds the requested HART addresses)

HIMS / HTG items

Item documentation

VQ Hydrostatic ullage request

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access


A@@PH999999999

Item VQ contains the HTG ullage value and is calculated as: VQ = UR - HQ (UR : upper reference). The ullage value is preceded by the 5 status bytes of item QF.

VV Pointer value

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access


99999999999999


Y1 (Y2, Y3) Stored pressure value of pressure transmitter P1 (P2, P3)

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access


A@@pH999999999

This item contains the stored pressure value at the time of an ST command of pressure transmitter P1 (P2, P3). The stored pressure value is preceded by the 5 status bytes from item QF.

YD Stored density value

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access


A@@pH999999999

This item contains the stored density value at the time of an ST command. The stored density value is preceded by the 5 status bytes from item QF.

YH Stored hydrostatic level

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access


A@@pH999999999

This item contains the stored hydrostatic level value at the time of an ST command. The stored level value is preceded by the 5 status bytes from item QF.

YV Stored hydrostatic ullage

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access


A@@pH999999999

This item contains the stored hydrostatic ullage value at the time of an ST command. The stored ullage value is preceded by the 5 status bytes from item QF.

Water bottom items

Item documentation

4.7 Water bottom items

EW Error water request

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

2400 / 2800 / 3000

This item contains the most resent error for the water bottom probe encountered by the HCU / ICU_HPI option board.

xx00 No error, value at initialization xx01 C_test error Either defective 762 VITO Interface or defective (leaking) water probe xx02 Linearity error Should be within 1% of the test capacitance, if too far out, change 762 VITO Interface xx03 No water probe available Measured capacitance is > 4000 pF; check water probe wiring to 762 VITO Interface terminals xx04 Subsystem error Defective 762 VITO Interface xx05 Capacitance too low Measured capacitance < 50 pF; check water probe wiring or change probe xx06 Capacitance too high Measured capacitance > 3000 pF; check water probe wiring or change probe xx07 Capacitance shortcut Either water probe error or internal 762 VITO Interface error xx11 No reply on initial HART command Communication error. Check connection: level gauge – 762 VITO Interface, or change 762 VITO Interface or change HCU / ICU_HPI board xx79 Not calibrated Check items VR and VT (should not be zero and should not be equal to each other) xx98 No water sources found No water probe connected

xx 24 for HPU emulation 28 for HSU emulation 30 for HCU emulation


Type Elem.

Protection

Dimension

Entry format

Default value

N

no write access

00

This item counts the number of fatal HCU or ICU_HPI errors. The maximum count is 99. When this count is reached, additional fatal errors are not registered.


Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

000 : 000

The first three bytes contains a fatal HCU or ICU_HPI error code before it came in fault condition.

HE HART communication errors

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

000 : 000 : 000 : 000

This item contains four error counters for communication errors with HART® transmitters. The first three counters are used for pressure transmitters and the fourth

counter for the water bottom probe. It counts the number of times the water bottom probe is considered to be absent. The maximum count is 999; additional errors are not registered. With an EX (or RS) command, the counters are reset.

LH Ullage water request

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access


A@999999999

This data item contains the measured water bottom ullage calculated as UR (Upper Reference) minus water bottom level. The water ullage value is preceded by two status bytes; refer to the description of item LW for details about the status bytes.

LW Innage water level

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access


A@999999999

This data item contains the measured water bottom level. The water level value is preceded by two status bytes s1, s2 with the following information:

Status byte s1: Status byte s2: bit 0 : General probe fail bit 0 : 0 Water probe is present

1 : Low water alarm 1 Water probe is absent 2 : High water alarm 1 - 5 : 0 3 : Water below probe warning 6 : 1 4 : Water above probe warning 7 : 0 5 : 0 6 : 1 7 : 0

Water bottom items

Item documentation

MX Measured capacitance VITO water bottom probe

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

pF

99999999999999

This item contains the actual measured capacitance of the VITO water bottom probe.

N4 Serial number water probe

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

9999999999

Only valid with external HART water probes (HART address is 4).

This item contains the serial number of the water bottom probe retrieved via the HART® command #16 or command #0.

PV Primary variable

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access

F9999999999999999

Only valid with external HART water probes (HART address is 4). With this item, the primary variable of the water bottom probe is requested. The communication address of the water bottom probe must be set to 4 (refer to configuration procedure of used water bottom probe). It can be left at ‘0' (analog mode) if there are no pressure transmitters connected (item PA set to: - - -). The primary variable data format is: 1 byte status, 2 bytes units, 14 bytes measured value.

status : - Valid data F Invalid data

units : Hexa decimal format (refer to HART® Smart Communication Protocol)

measured value : Floating point format

SR Stop HART request

Type Elem.

Protection

Dimension

Entry format

Default value

C

level 2

With the SR command the HART® communication between the HCU or ICU_HPI and the connected HART

® transmitter(s) is stopped. The communication will be

resumed after an EX (or RS) command.

This command should be used when another instrument wants to be master on the HART® communication line (e.g. a HART

® Communicator).

Note: With the HCU and ICU_HPI boards, the HART

© communication on both channels is stopped.

VP Value pointer

Type Elem.

Protection

Dimension

Entry format

Default value

D

not protected


99999

The VP item consists of 4 positions, separated in the middle: v w . x y (or v w , x y). This item, together with item VV, makes it possible to request several important calculation results. By means of the value pointer, a vector can be loaded to the HCU and ICU_HPI board. Then, with item VV the selected value is returned. For the temperature part of the HCU and ICU_HPI board, the following pointer values can be requested:


0 0 0 0 0 0 0 0

0 3 0 3 0 3 0 3 0 3 0 3 0 3

0 4 0 4

.

.

.

. . . . . . . . .

0 0 0 1 0 2 0 3

0 1 0 2 0 9 1 0 1 1 1 2 2 0

0 0 0 1

HCU / ICU_HPI Emulation & Function Configuration boot code HCU / ICU_HPI hardware version Boot code software version Error counter HART addresses 3, 4 and 5 Error counter HART addresses 6, 7 and 8 Detected HART device addresses Initial detected VITO device type Real active functions of VITO Interface Actual executed HART commands from 762 VITO Interface Averaging constant 762 VITO Interface (floating point format) C_test from 762 VITO Interface (floating point format) C_Linearity from 762 VITO Interface (floating point format)

762 VITO-MTT: HART address is: 5 762 VITO-LT HART address is: 6 5 for VITO-MTT; 6 for VITO-LT pF pF

Example: VP=03.09 (Value pointer for requesting the detected HART device addresses)

VV (Item VV holds the requested HART addresses)

Water bottom items

Item documentation

VR VITO water probe minimum capacitance

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

pF


+.00000000E+00

This item contains the minimum capacitance the VITO water bottom probe measures. This is the situation with 0% water (probe completely immersed in product). The water level is calculated as:

Note: In the factory, the VITO water bottom probe is calibrated for two situations. Item VR originally contains the factory calibration for the VITO water bottom probe placed in air. The factory calibration value can be found on the “Checklist Final Assembly”, delivered with every probe. When the probe is installed, a re-calibration must take place for 100% product. In that situation, the measured capacitance (item MX) must be copied into item VR.

VT VITO water probe maximum capacitance

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

pF


+.00000000E+00

This item contains the maximum capacitance the VITO water bottom probe measures. This is the situation with 100% water (probe completely immersed in water). Refer to the description of item VR. This item contains the factory calibration for the VITO water bottom probe placed in water.

VV Pointer value

Type Elem.

Protection

Dimension

Entry format

Default value

D

no write access


99999999999999


WB Water probe bottom position

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


+000.0000 (m)

This item contains the offset between the water bottom probe zero point - and the zero point (datum plate) of the tank.

WF Water level field communication

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2

1 ASCII character

D

Only valid for 854 level gauges. The water level field communication item selects from which source the water level is selected in the B-record (level record). The setting means:

• S : From water bottom probe • D : From water dip (displacer)

The water level from a water bottom probe will be placed in the B-record after a ‘W’ (water) command is issued to the 854 level gauge (refer to the protocol manual).

Note: The M-record always contains the water level from a water bottom probe. Therefore, we recommend to use the M-record for water level with water bottom probes.

WH Water high alarm

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1


+000.0000 (m)

With item WH, a high water level alarm set point can be given. When the water level exceeds the programmed high water alarm setting the following actions take place:

• a status bit is set in the items LH and LW (bit 2 in status byte s1)

• the character ‘H’ is transmitted in the water alarm status of the water level record (M-record) • the characters ‘HW’ (high water alarm) are displayed on the water level display (display format K)

To prevent on/off switching of the high water level alarm due to small variations in the measured water level, a water alarm hysteresis is implemented (item WS). The high water level alarm status is set when the measured water level is higher than the high water level alarm set point. The high water level alarm status is reset when the measured water level is lower than the high water level set point minus the water alarm hysteresis.

Water bottom items

Item documentation

WL Water low alarm

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1


+000.0000 (m)

With item WL, a low water level alarm set point can be given. When the water level drops below the programmed low water alarm setting the following actions take place:

• a status bit is set in the items LH and LW (bit 1 in status byte s1)

• the character ‘L’ is transmitted in the water alarm status of the water level record (M-record) • the characters ‘LW’ (low water alarm) are displayed on the water level display (display format K)

To prevent on/off switching of the low water level alarm due to small variations in the measured water level, a water alarm hysteresis is implemented (item WS). The low water level alarm status is set when the measured water level is lower than the low water level alarm set point. The low water level alarm status is reset when the measured water level is higher than the low water level set point plus the water alarm hysteresis.

WP Water probe length

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 2


+001.0000 (m)

The water probe length is required for the water level detection. The water probe length is specified on position 2 of the Model Selection Code of the model 765 / 766 / 768 VITO probe as follows:

Position 2 Model Selection Code

Water probe length

A B C

+000.4850 (m) +000.9850 (m) +001.9850 (m)

WS Water alarm hysteresis

Type Elem.

Protection

Dimension

Entry format

Default value

N

level 1


+000.0100 (m)

The water alarm hysteresis is used to set a hysteresis around the water alarm levels. Refer to description of items WH and WL.

Appendix

Item documentation

Appendix A ASCII table HEX MSB

0 1 2 3 4 5 6 7

BIT 654 654 654 654 654 654 654 654

LSB 3 2 1 0 000 001 010 011 100 101 110 111

0 0 0 0 0 NUL DLE SP 0 @ P ‘ p

1 0 0 0 1 SOH DC1 ! 1 A Q a q

2 0 0 1 0 STX DC2 “ 2 B R b r

3 0 0 1 1 ETX DC3 # 3 C S c s

4 0 1 0 0 EOT DC4 $ 4 D T d t

5 0 1 0 1 ENQ NAK % 5 E U e u

6 0 1 1 0 ACK SYN & 6 F V f v

7 0 1 1 1 BEL ETB ‘ 7 G W g w

8 1 0 0 0 BS CAN ( 8 H X h x

9 1 0 0 1 HT EM ) 9 I Y i y

A 1 0 1 0 LF SUB * : J Z j z

B 1 0 1 1 VT ESC + ; K [ k

C 1 1 0 0 FF FS ‘ < L \ l l

D 1 1 0 1 CR GS - = M ] m

E 1 1 1 0 SO RS . > N ^ n ~

F 1 1 1 1 SI US / ? O - o DEL

Appendix

Item documentation

Appendix B Related documents Instruction manual series 854 ATG level gauge Instruction manual series 854 XTG level gauge Instruction manual 970/971/973 SmartRadar level gauge Instruction manual 877 FDI Field Display & Interface Instruction manual SPU II Hard alarm output contacts Instruction manual 854 density option Instruction manual APU Hard alarm output contacts Installation & set-up manual 877 RPU option board Instruction manual VITO Interface and Average Temperature (and water) probes for 854, 97x and 877 Instruction manual Spot temperature and Analog output options for 854, 97x and 877 Instruction manual XPU-2 option RS-232C / RS-485 Instruction manual HIMS Instruction manual HTG

Index

Item documentation

Item index

00 ........................................................ 39 03 ........................................................ 39 0A (0B, 0C, 0D) .................................. 39 0H ........................................................ 39 0O ........................................................ 39 24 ........................................................ 20 25 ........................................................ 20 26 ........................................................ 20 28 ........................................................ 68 29 ........................................................ 68 3Z ........................................................ 40 4L ........................................................ 20 4M ....................................................... 21 4P ........................................................ 21 4S ........................................................ 21 4U ........................................................ 21 4V ........................................................ 22 4W ....................................................... 22 4X ........................................................ 22 4Y ........................................................ 22 4Z ........................................................ 22 5A ........................................................ 23 5C ........................................................ 23 5D ........................................................ 23 5E ........................................................ 23 5G ........................................................ 23 5O ........................................................ 23 5P ........................................................ 23 5Q ........................................................ 24 5R ........................................................ 24 60 ........................................................ 24 7G ........................................................ 24 A0 ........................................................ 24 A1 ........................................................ 48 A2 ........................................................ 48 A3 (A4) ................................................ 55 A5 (A6) ................................................ 55 AB ....................................................... 24 AC ....................................................... 24 AE ........................................................ 55 AF ........................................................ 55 AG ....................................................... 62 AH ......................................................... 6 AK ....................................................... 56 AM ....................................................... 56 AN ....................................................... 56 AO ....................................................... 56 AP ................................................. 59, 62 AQ ....................................................... 57 AR ......................................................... 6 AT ........................................................ 25 AU ....................................................... 25 AV ........................................................ 57 AW ....................................................... 25 AX ........................................................ 25 AZ ........................................................ 26 B0 ........................................................ 26 BC ....................................................... 40 BD ....................................................... 26 BF ........................................................ 10 BI ......................................................... 40 BL ........................................................ 10 BM ....................................................... 10 BT ........................................................ 10 BU ....................................................... 10 BV ....................................................... 10 BW....................................................... 11 BZ ........................................................ 26 CA ....................................................... 11 CD ....................................................... 40

CH ....................................................... 26 CL ........................................................ 26 CM ....................................................... 27 CQ ....................................................... 11 CS ....................................................... 27 CT ........................................................ 27 CW ...................................................... 27 CX ....................................................... 28 CY ....................................................... 28 CZ ........................................................ 28 D0 (D1 .. D9) ....................................... 48 DA ....................................................... 11 DB ....................................................... 48 DC ....................................................... 11 DD ....................................................... 68 DE ......................................................... 6 DF ........................................................ 40 DG ....................................................... 40 DH ....................................................... 11 DI ................................................... 49, 68 DJ ........................................................ 41 DK ....................................................... 49 DL ........................................................ 69 DM ....................................................... 11 DN ....................................................... 49 DO ................................................. 12, 49 DP ....................................................... 41 DQ ....................................................... 69 DT ........................................................ 12 DU ....................................................... 69 DV ....................................................... 49 DW ................................................ 12, 49 DY ....................................................... 41 DZ ........................................................ 50 EA........................................................ 57 EB ....................................................... 28 EE ........................................................ 29 EG ....................................................... 36 EH ....................................................... 69 EJ ........................................................ 41 EK ....................................................... 29 EM ................................................. 59, 62 EN ....................................................... 36 EP ........................................................ 41 ER ....................................................... 12 ES ........................................................ 12 EW ....................................................... 78 EX ........................................................ 43 EZ ........................................................ 50 F0 (F1, F2, F3) .................................... 14 FA ........................................................ 29 FB ........................................................ 36 FC ........................................................ 29 FH ..................................... 59, 63, 69, 78 FI ......................................................... 30 FL ........................................................ 36 FO ....................................................... 57 FP ........................................................ 14 FQ ....................................................... 14 FR ........................................................ 14 FS ........................................................ 14 FX ........................................................ 43 GA ....................................................... 37 GD ....................................................... 14 GT ....................................................... 43 GU ....................................................... 15 H0 ..................................... 59, 63, 69, 78 H1 (H2, H3) ......................................... 70 HA ......................................................... 6 HC ....................................................... 15

HD ....................................................... 70 HE ................................................. 70, 78 HF ......................................................... 7 HH ......................................................... 7 HL ......................................................... 7 HQ ....................................................... 70 HT ....................................................... 70 I1 (I2, I3) .............................................. 15 IF ......................................................... 71 IL ......................................................... 71 IM ........................................................ 37 IN ......................................................... 43 IP ......................................................... 50 IT ......................................................... 71 J0 (J1 .. JD) ........................................ 63 JS ........................................................ 43 L2 (L3) ................................................ 15 LA .......................................................... 8 LD ......................................................... 8 LE ........................................................ 30 LG ....................................................... 72 LH ....................................................... 78 LL .......................................................... 8 LM ....................................................... 72 LN ....................................................... 72 LP ........................................................ 72 LQ ....................................................... 15 LS ........................................................ 72 LT ........................................................ 16 LU ................................................. 30, 72 LW ....................................................... 78 M1 (M2, M3) ........................................ 73 M5 ....................................................... 30 M6 ....................................................... 30 M7 ....................................................... 30 MF ....................................................... 16 MG ...................................................... 63 MH ....................................................... 16 MI .................................................. 59, 63 MJ ....................................................... 63 MK ....................................................... 64 ML ....................................................... 16 MM ...................................................... 37 MN ................................................. 59, 64 MO ................................................ 60, 64 MP ....................................................... 64 MQ ................................................ 60, 65 MT ................................................. 60, 65 MU ................................................. 60, 65 MW ...................................................... 65 MX ....................................................... 79 MZ ....................................................... 16 N0 ........................................................ 37 N1 (N2, N3) ......................................... 73 N4 ........................................................ 79 NS ....................................................... 37 NT ....................................................... 31 O1 (O2, O3) ........................................ 73 OA ....................................................... 58 OB ....................................................... 38 OE ....................................................... 31 OF ....................................................... 58 OM ...................................................... 31 OR ....................................................... 31 OS ....................................................... 31 OT ....................................................... 31 OZ ....................................................... 32 P0 ........................................................ 73 P1 (P2, P3) ......................................... 73 P4 ........................................................ 73

Index

Item documentation

P5 ........................................................ 73 P6 ........................................................ 73 P7 ........................................................ 74 P8 ........................................................ 74 P9 ........................................................ 74 PA ........................................................ 74 PB ....................................................... 32 PC ....................................................... 32 PD ....................................................... 44 PE ........................................................ 52 PF ........................................................ 44 PH ....................................................... 74 PI ......................................................... 74 PL ........................................................ 52 PM ....................................................... 32 PN ....................................................... 44 PO ....................................................... 44 PP ........................................................ 32 PQ ....................................................... 52 PR ....................................................... 32 PV ........................................................ 79 PX ........................................................ 52 PY ........................................................ 52 PZ ........................................................ 52 Q1 (Q2, Q3) ........................................ 75 QF........................................................ 75 QH ....................................................... 32 QQ ....................................................... 75 QR ....................................................... 33 QS ....................................................... 17 R0 (R1 .. R9) ....................................... 50 RB ....................................................... 33 RD ....................................................... 33 RF ................................................. 51, 76 RG ....................................................... 76 RH ....................................................... 44 RI ......................................................... 33 RJ ........................................................ 76 RL .......................................................... 8 RM ....................................................... 17 RN ......................................................... 8

RS ....................................................... 44 RT ........................................................ 33 RU ....................................................... 33 RV ....................................................... 38 RX ......................................................... 9 RY ......................................................... 9 RZ .......................................................... 9 S0 ........................................................ 17 S1 (S2, S3).......................................... 17 SA........................................................ 33 SB ....................................................... 45 SC ....................................................... 51 SD ....................................................... 51 SE ........................................................ 52 SF ........................................................ 34 SH ....................................................... 53 SI ......................................................... 53 SM ....................................................... 18 SN ....................................................... 53 SO ....................................................... 18 SQ ....................................................... 53 SR ................................................. 76, 79 ST ........................................................ 45 SV ........................................................ 45 SY ........................................................ 53 SZ ........................................................ 53 T1 (T2, T3) .......................................... 18 TA ........................................................ 45 TC ........................................................ 45 TD .................................................. 60, 66 TF ........................................................ 38 TG ....................................................... 18 TH ........................................................ 46 TI ......................................................... 46 TM ....................................................... 38 TN ........................................................ 38 TO ....................................................... 38 TP ........................................................ 51 TS ........................................................ 46 TT ........................................................ 18 TU .................................................. 61, 66

TV ........................................................ 34 TW ....................................................... 34 TX ........................................................ 34 U0 (U1 .. UF) ....................................... 66 UN ....................................................... 18 UQ ....................................................... 18 UR ......................................................... 9 V0 (V1 .. VF) ....................................... 66 VP .............................. 58, 61, 67, 76, 79 VQ ....................................................... 77 VR ....................................................... 80 VT ........................................................ 80 VV .............................. 58, 61, 67, 77, 80 W1 ....................................................... 46 W2 ....................................................... 47 WA ...................................................... 19 WB ...................................................... 80 WC ...................................................... 34 WF ....................................................... 80 WH ...................................................... 80 WK ...................................................... 35 WL ....................................................... 81 WM ...................................................... 47 WP....................................................... 81 WQ ...................................................... 19 WS....................................................... 81 WT ....................................................... 19 WV....................................................... 51 XI ......................................................... 54 XS ....................................................... 47 XT ........................................................ 54 Y1 (Y2, Y3) .......................................... 77 Y4 ........................................................ 19 YD ....................................................... 77 YH ....................................................... 77 YP.................................................. 61, 67 YV........................................................ 77 ZA ........................................................ 35 ZB ....................................................... 35 ZP ........................................................ 35 ZY ........................................................ 35

Notes

Item documentation

For More Information To learn more about Honeywell Enraf’s solutions, contact your Honeywell Enraf account manager, or visit www.honeywellenraf.com

Americas Asia Pacific Honeywell Enraf Americas, Inc. Honeywell Pte Ltd. 2000 Northfield Ct. 17 Changi Business Park Central 1 Roswell, GA 30076 Singapore 486073 USA Phone: +65 6355 2828 Phone: +1 770 475 1900 E-mail: [email protected] E-mail: [email protected]

Europe, Middle East, and Africa Honeywell Enraf Delftechpark 39 2628 XJ Delft The Netherlands 4416277 – Revision 05 Phone: +31 (0)15 2701 100 August 2013 E-mail: [email protected] ©2013 Honeywell International Inc.

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