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Contents

Chapter 1Service Menus 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 2General 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 3Service Terminal Main Menu 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 4Controlling the TPS 64 System 21. . . . . . . . . . . . . . . . . . . . . . . . . . . .4.1 General 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.2 Affecting the user interface 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.2.1 Menu reminders 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.2.2 Answer reminders 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.3 Two users trying to control the system 26. . . . . . . . . . . . . . . . . . . . . .

4.4 Disorders in remote end communication 27. . . . . . . . . . . . . . . . . . . . .

Chapter 5TPS 64 Equipment Menus 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.1 Fault display 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.2 Local alarm cancel 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.3 Reset local cancel 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.4 Identifications 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.5 Controls 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.6 Settings 41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.7 Measurements 65. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.8 Statistics 66. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.9 Testing 74. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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TPS 64 Operation with Service Terminal

NTC DTPS6-0829-SEA2 Copyright Nokia Telecommunications Oyvi

5.10 User privileges 80. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.11 Miscellaneous 82. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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NTC DTPS6-0829-SEA2 Copyright Nokia Telecommunications Oy2

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Service Menus

NTC DTPS6-0829-SEA2 Copyright Nokia Telecommunications Oy 3

IDENTIFICATIONS: 4,7 4,9

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CONTROLS: 5,2 5,9

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Service Menus


SETTINGS: Service options 6,1

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SETTINGS: Service options, TPS 64 specific

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Service Menus


SETTINGS: 6,2 6,9

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SETTINGS: Equipment configuration 6,2 and Transmitter 6,4

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Service Menus


SETTINGS: Receiver settings 6,5

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SETTINGS: Command output control 6,5,4,1,x and 6,5,4,2,y

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Service Menus


MEASUREMENTS: 7,1 and 7,9

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STATISTICS

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Service Menus


TESTING

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Service Menus


MISCELLANEOUS: 11,1,1 11,1,6

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General


Chapter 2General

Teleprotection Signalling Equipment TPS 64 is controlled by the Service Ter-minal, the use of which is described in the Operating Manual of Service TerminalTC 21700. By means of the Service Terminal, the basic settings of the equipmentcan be performed and stored into the permanent storage (replaces strapping),maintenance-related measures, e.g. loopback signals back to the equipment, canbe taken, and identifications, statistics, etc. can be read from the equipment.

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Figure 1 Service Terminal keys

Command parameter separatorThe Service Terminal functions are menu-based. The menu levels can be by-passed if the operator knows the required command strings. The , key is used as acommand parameter separator. For example, if TOP 5,2,2 RET is given from themain level, the red service LED on the equipment blinks.

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Service Terminal Main Menu


Chapter 3Service Terminal Main Menu

When the Service Terminal is switched on, it shifts into mode Use of equipment/ Select operation, which is the default setting. The main menu common to allequipment, offered by the Service Terminal, is displayed:

1 Fault displayThe fault display indicates the fault status of the equipment. The fault data indi-

cates:equipment ID (e.g. STATION_01 ABC )fault status ( A B D S or combination of these)supervision block indicating the part of the equipment being faultyfault type

The equipment ID is given by the operator in the Identifications menu.

2 Local alarm cancelIn case of fault, local alarm cancel disables rack alarms A and B. As a reminder of the local alarm cancel , a D-alarm is activated. Local alarm cancel on an equipmentwith fault status OK produces alarm B.

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3 Reset local cancelNormal operation is restored.

4 IdentificationsUnder this function, the equipment identification data, such as equipment type,the name given to the equipment and the type and version of the program used, canbe read. Some of the identifications can be changed by the operator.

5 ControlsUnder this function, the controls are given that temporarily change the operatingmode of the equipment, for example for testing of functions.

6 Settings

The settings determine the operating mode of the equipment. They are stored inthe equipment into a non-volatile memory and therefore retain their values in theevent of a supply voltage break.

7 MeasurementsUnder this function, various internal measurements are performed by the equip-ment (without external measuring instruments).

8 StatisticsReading and emptying of event register and other statistics collected by the equip-

ment.

9 TestingAutomatic tests performed by the equipment.

10 User privilegesThe user s access to the equipment can be defined under this function. Part of theequipment settings can be protected (e.g. Settings). The equipment can be given apassword that must be known if protected functions are to be changed.

11 MiscellaneousThe functions related to the control of the real time clock can be found here.

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remote end. However, under the menu branch 9 Testing you can find three com-mands that can be used instead as described in chapter 5.9 .

When a user, having first made some of the selections 4...11 , selects 9 Remote end ,a similar menu is returned. However, the selection 9 Remote end is no more visibleand a text, also called tag or reminder in this manual, is shown in the upper rightcorner Remote end . It reminds the user that he/she has entered the remote-endterminal. All succeeding commands will now affect the remote-end terminal.

For example, the previous Controls menu will look as follows when the remoteend terminal has been entered:

If the user now tries to select 9 again, the following text is displayed:

The reason for this message is quite apparent: The mentioned selection would con-nect the user back to the near-end TPS 64 terminal which was previously left byselecting 9.

4.2 Affecting the user interfaceBecause both TPS 64 terminals serve the same commands, the TPS 64 helps theuser in being aware of to which one of the two terminals he/she is connected. Thedegree of this help can be affected by several reminders, which can be switched onor off in any combination. The appearance of the menus is determined by menureminders which can be found under the item 6,1,9,3 Settings, Service options,TPS 64-specific, Menu reminders The appearance of answers is affected byanswer reminders which can be found in the TPS 64-specific service optionsunder sub-item 4 Answer reminders How to affect the reminders with menu com-mands is explained in conjunction with other menu commands in the next chapter.The purpose of this chapter is to clarify the effect of the reminders on the userinterface. Note that the word reminder is used here and elsewhere in this manual intwo different meanings. Firstly, it refers to the reminding texts, also called tags,appearing on the Service Terminal (emulator) display; secondly, it refers to theinternal on/off flags in the non-volatile memory of the TPS 64 that are affected bymeans of settings.

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Controlling the TPS 64 System


The possibility to affect the user interface is undoubtedly a great help in the oper-ation of the TPS 64. However, the operating personnel might be confused if theTPS 64s that they operate do not have an identical user interface. To avoid thisproblem it is recommended that a standard practice in this issue be created beforethe commissioning of the first systems. It is especially important to have identicalreminder settings in both terminals belonging to the same system. All displayexamples in this document are based on this assumption.

4.2.1 Menu reminders

The appearance of the menus is determined by three reminders, which can be dis-played with command 6,1,9,3,0 Menu reminders: Display The following sampledisplay corresponds to the delivery settings:

If the reminders have the above values, the menus of the near-end and remote endequipment look like in the two examples presented in 4.1 General.

When the equipment ID reminder has been switched on, the equipment identifica-tion string, i.e. the name of the equipment will be displayed above the menu text. If the user definable names of the two terminals of a TPS 64 system are TPS 64 MAX-WELL and TPS 64 KIRCHOFF , and the Service Terminal (emulator) is connectedto TPS 64 MAXWELL the Settings menu returned by selection 6 will look likethis:

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Entering the remote end terminal by selecting item 9 Remote end returns the fol-lowing display:

In considering the practice to be adopted with respect to equipment ID reminder it

should not be forgotten that several menus have been carefully designed to fit ontothe four by twenty character display of the Service Terminal. If the equipment ismainly operated with a Service Terminal emulator, the use of equipment IDreminder can be strongly recommended.

Remote end reminderThe two remote end menus shown in the preceding text are based on the assump-tion that the remote end reminder has been switched on which is the delivery valueof this flag. It is possible to switch this reminder off but the users are discouragedfrom doing so.

Near-end reminderSwitching near-end reminder on makes the Near-end tag visible on the near-endmenus. On the one hand, this increases the amount of text to be displayed, on theother hand it creates some visual symmetry to the user interface.

4.2.2 Answer reminders

The answer reminders can be used to remind the user of which equipment returnedthe answer. The answers have been placed in two categories that can be affectedseparately. Simple, mostly one-line, messages belong to short answers . A typical

example is the done text returned upon execution of a user-specified commandthat brings about some change in the equipment. The other group is formed bysome more complex answers typically returned upon execution of a Display com-mand.

It should be noted that some of the answers returned by the TPS 64 do not containany reminding text irrespective of the values of the reminders described here. Atypical example of this is the System reserved message.

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Controlling the TPS 64 System


All answer reminders can be displayed with command 6,1,9,4,0 Settings: Serviceoptions: TPS 64 specific: Answer reminders: Display At the moment of deliverythese reminders have the values shown in the following display:

When the reminders have the values shown above, executing the command 6,4,0Settings: Transmitter settings Display in the remote end equipment could returne.g. the following display:

The answers returned by near-end commands do not contain any reminding text if the reminders have the delivery values.

Equipment ID reminderIf equipment ID reminder has been switched on, the name of the equipment will bedisplayed on the topmost line of some answers. Executing in the near-end equip-ment e.g. the previous transmitter settings display command could then return thefollowing:

It should be noted that many of the answers have been carefully designed to fitonto the four by twenty character display of the Service Terminal. The above dis-play is an example that shows how one important line bleeds out of the ServiceTerminal display due the equipment ID reminder. Of course the lost line can besimply regained by typing .

Remote end reminder Remote end reminder determines whether the Remote end tag will be displayedin conjunction with answers returned by remote end equipment. This is the onlyanswer reminder being switched on at the moment of delivery. If it is also switchedoff, no reminding text of any kind will be displayed with the answers.

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Near-end reminderIf near-end reminder has been switched on, the Near-end tag will appear so that avisual symmetry with the corresponding answers returned by the remote endequipment results. For example:

Short answer reminderThe short answer reminder determines whether the Near-end Remote end tagwill be added to the short answers. Note that the tag is only displayed if the corre-sponding remote end reminder or near-end reminder has also been switched on.For example:

Equipment ID is never displayed with short answers.

4.3 Two users trying to control the systemWhen the user connects a Service Terminal (emulator) to one of the two TPS 64

terminals belonging to the same system, i.e. being connected by a 64 kbit/s chan-nel, he/she gets the right to control both terminals. If somebody else is now tryingto get access to the remote end terminal by connecting a Service Terminal (emula-tor) to it, the later user can execute only the fault display command. If he tries toexecute any other command, the following is displayed:

If the later user is on site, he/she also can see that the green led of the control unit islit to indicate that somebody is controlling the system.

If the 64 kbit/s connection is now broken, the later user gets access to the TPS 64terminal after a few seconds. The terminal will, however, remember that the pri-mary right to give commands belongs to the first user. Therefore, if the 64 kbit/sconnection is restored and the first user is still there, the later user will again get theSystem reserved message.

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If an error burst occurs when the near-end terminal is waiting for an answer fromthe remote end terminal or when it has started to receive an answer, the followingwill be displayed:

Note that in this case it is possible that a coincident error burst in the other trans-mission direction caused the remote end terminal not to receive the commandwhich accordingly is not executed. In this case the previous display would, of course, be the correct answer but is inherently impossible to return because thenear-end equipment does not know whether the remote end equipment did receivethe command or not.

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TPS 64 Equipment Menus


Chapter 5TPS 64 Equipment Menus

Teleprotection Signalling Equipment TPS 64 is controlled via the service inter-face in the control unit CU 24201. If the equipment configuration includes twocontrol units, they must both be controlled via their own service interfaces. Theonly TPS 64 internal communication between the two control units is an on/off motherboard signal that enables the appropriate alarm status to be determined inconjunction with incoming signal and control unit faults as explained in the partFunctional description of this manual.

Channel unit CU 24202 does not have a maintenance interface of its own. Thefault data of the channel unit(s) can be read via control unit A.

5.1 Fault displayThe control unit monitors, in addition to its own operation, the state of both chan-nel units. These three units comprise a functional entity that is divided into threesupervision blocks.

TPS 64 MAXWELL (AS)Control unit:

Loss of incoming signal

TPS 64 MAXWELL is the name of the equipment, Control unit: is the name of theconcerned supervision block. Loss of incoming signal is the fault that has beendetected. The notation AS indicates the fault status of the equipment.

The information displayed by command 1 Fault display is based on the fault codesof the TMS system. The texts corresponding to each fault case have been storedinto the memory of the Service Terminal and are therefore common to all types of equipment that can be controlled with the TMS. Due to this fact, the displayobtained with command 1 Fault display does not describe the situation in an opti-mum manner in all fault cases. For user convenience there is an additional com-mand 9,1 Fault display that essentially supplies the same information but withsomewhat different terms. Most users will probably find the display returned bythe latter command easier to understand. Additionally, the latter command canalso be executed in the remote end equipment by typing 9,9,1 Testing: Remote end:

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Fault display . This is, of course, possible only if the fault does not break the64 kbit/s signal which is used to access the remote end terminal.

5.2 Local alarm cancelIn a fault situation, rack alarms A and B are removed by the command Local alarmcancel . As a reminder of the cancellation, alarm D is given. A local alarm cancella-tion when the equipment is OK produces a B-alarm. The local alarm cancel func-tion replaces the conventional acknowledgement switch. This command can beexecuted in the remote end TPS 64 by selecting 9,9,2 Testing: Remote end: Localalarm cancel .

5.3 Reset local cancel

Giving the command Reset local cancel restores the normal alarm functions afterthe fault has been repaired. This function can be executed in the remote end equip-ment by selecting 9,9,3 Testing: Remote end: Reset local cancel.

5.4 Identifications

Selections 1...7 enable the user to display the various identifications of the equip-ment, via item 8 the identifications can be changed and via item 9 Remote end theidentifications of the remote end equipment can be accessed.

4,1 Equipment typeFixed designation describing the equipment type, on the basis of which the equip-ment being operated by the Service Terminal can be separated from other similarequipment and from possible later versions of the Teleprotection SignallingEquipment. Answer displayed:

TPS 64

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4,2 Equipment IDThe equipment ID is an individual equipment name, given by the operator, thatcan be used for network management. This designation is also displayed in thefault display answer. Sample reply:

TPS 64 STATION_1

4,3 User manualThe code of the document Operation with Service Terminal - relating to the pro-gram; fixed. Sample reply:

DTPS6-0829-SEA

4,4 64 kbit/s interface IDConnection-specific identifications, given by the operator, that can be used fornetwork management. Sample reply:

EDEFORS > PORSI

4,5 Unit IDUnit type designation and version code. Set at factory, but the operator can changeit e.g. in connection with repair. Sample reply:

CU 24201 02A

4,6 Program IDThe type designation and version of both programs are fixed. Displayed answer:

4,7 Command interface IDsThis selection shows the identifications given for each command interface by theoperator. The identifications indicate the installation environment of the equip-ment. Viewing of the identifications is started by selecting the command channelgroup:

Since the output and the input of a command channel are not always connected to

the same protection relay, both the command output and the command input con-

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nection have been presented for each command channel. When channel group1...4 is selected, the following sample reply is displayed:

The sample display shows one possible practice to denote command channels thatare used to increase the dependability or security of the application by means of awired OR and wired AND connection, respectively.

4,8 Modify IDsBy this selection ( 4,8 ), identifications can be modified. First, a menu is obtainedby means of which the identification to be changed is selected:

4,8,2 Modify equipment IDBy this selection, the equipment identification can be modified:

Equipment ID:0 Display1 Modify

Selection 0 displays the equipment ID and selection 1 gives the text:

Give ID string1...16 char.

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4,8,4 Modify 64 kbit/s interface IDBy this selection, the identification of the 64 kbit/s interface can be modified:

Selections 0 and 2 display the identification, selections 1 and 3 give the followingtext:

4,8,5 Modify Unit IDBy this selection, the control unit identification can be modified:

Selection 0 displays the control unit ID and selection 1 gives the text:

4,8,7 Modify command interface IDsBy this selection, the command channel identifications can be modified. The fol-lowing text is displayed:

When the command interface whose identifications are to be changed is selected,the following menu is displayed:

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Selection 0 displays and selection 1 modifies the command input identification.Selection 2 displays and selection 3 modifies the command output identification.Selections 1 and 3 give the following text:

4,9 Remote end identificationsSee chapter 4 CONTROLLING THE TPS 64 SYSTEM.

5.5 Controls

Controls are intended for temporary modification of the operating mode of the

equipment. They can also be used to test several functions of the equipment.

5,0 Display active controlsBy this selection, all active controls in the Teleprotection Signalling Equipmentare displayed. Sample reply:

When no controls are active, the reply Normal is obtained.

5,1 TPS 64 to normal stateForces all controls of the Teleprotection Signalling Equipment TPS 64 to normalstate. User-activated controls can also be cancelled by the control time-out asexplained later. However, the controls 5,6,2 To secure state 5,7,2 Lock outputs and5,8,2 Lock transmitter remain active despite the command 5,1 or control time-out.

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5,2 64 kbit/s loopingSelection 5,2 returns the following menu:

Selection 5,2,2 Loop to equipment reminds the user of the potential danger of unwanted commands that may be caused by looping the 64 kbit/s signal back to theequipment and requires the user either to confirm or to cancel the command.

If both control units A and B have been inserted into the TPS 64 cartridge, loop-back is not allowed. The following text will appear:

The reason for this is explained in the part Operation of this manual. To enable theloopback, one of the control units must be removed from the cartridge.

Executing command 5,2,2 Loop to equipment in the remote end equipment woulddisconnect the the user from the remote end equipment. Therefore, the commandis not executed and the text Looping is not allowed in remote end is returned.

Loopback the 64 kbit/s signal back to the equipment is also forbidden if one ormore of the following controls is active: Secure state, Command output lockingand Transmitter locking. The texts returned are Looping is not allowed togetherwith secure state Looping is not allowed together with command output lockingand Looping is not allowed together with transmitter locking respectively. Thethree controls mentioned above are, of course, forbidden if the loopback is active.

When the 64 kbit/s signal is looped the equipment starts to send the alarm indica-tion signal AIS to the remote end equipment. Therefore, if the user tries to executeremote end commands when the loopback is active, the text No connection toremote end is returned.

The purpose of the loopback facility is to enable the testing of those parts of theequipment that are not continuously monitored by the control processor. To dim-inish the danger of unwanted commands, the loopback is provided with a filteringthat prevents short commands (in many applications the commands have a dur-ation not exceeding a few hundred milliseconds ) from passing the looped equip-ment. Accordingly, the command input must be turned to the state command for atleast one second to turn the corresponding command output to the state command .

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The initiation and the cancellation of the 64 kbit/s loop to equipment are registeredbecause the loop prevents the normal operation of the teleprotection system. Thecommand registration is not in use when the loopback is on. Accordingly, the testcommands used to verify the operation cannot be found in the event register.

5,4 Forced indicationsThe controls under this function are time-controlled. They can be used e.g. tocheck that the control unit LED display is OK. The selection provides the follow-ing display:

Selection 0 (5,4,0 ) displays the active forced controls of the control unit LED dis-play.

Selection 1 (5,4,1 ) removes the forced controls of the LEDs. The state of the dis-play is determined by the fault conditions.

Selection 2 (5,4,2 ) makes the red service LED blink. Activating this control causesa Forced indication alarm to be given. The alarm status is B.

Selection 3 (5,4,3 ) makes the yellow service LED blink. When this control is

active, it also causes a Forced indication alarm to be given. The alarm status is B.Selection 4 (5,4,4 ) turns off the LEDs (the green service LED is, however, on if theequipment is connected to the Service Terminal). The alarm Forced indication isgiven. In this case the alarm status is A.

5,5 Forced alarm outputsThe controls under this function are time-controlled. They can be used to check that the equipment rack alarm outputs, programmable alarm outputs and telepro-tection alarm outputs are OK. The selection provides the display:

Selection 1 (5,3,1 ) resets all forced alarm output controls, in which case the state of the outputs is determined by the fault condition.

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Selections 2...8 give the following menu:

In several applications, the teleprotection alarms TPA1 and TPA2 may cause apower system protection scheme reconfiguration. To avoid unintended oper-ations, the user is reminded of this and prompted to confirm the command.

When teleprotection alarms TPA1 and (in the case of eight command channels)TPA2 are forcibly-controlled it must be noted that the output cannot be forced tothe alarm state if there is one control unit in the cartridge sending a no alarm signalto the channel unit concerned. In order to force the alarm output to the alarm statein the Teleprotection Signalling Equipment composed of two control units, thecommand 5,3,7/8 must be issued in both control units.

5,6 Secure state controlThis control is used to ensure that nothing can be done that would result in anunwanted command at the command output of the near- or remote- end equip-ment. The control processor executes this command by locking the near-end com-mand outputs and by forcing the outgoing 64 kbit/s to an all-ones string (AIS). Inaccordance with the nature of this control, its effect is permanent, i.e. it can bereset only by Service Terminal command ( 5,6,1 ) Controls: Secure state control: Tonormal state . The selection produces the following display:

Caution The effect of secure state is control unit internal. This means that if the equipment configuration includes two control units, the tele-protection commands can pass in both transmission directions of the system even if one of the control units is in secure state becausethe redundant control unit is still in operation. This is explained ingreater detail in the part Operation of this manual. To block thetransmission of teleprotection commands, the command 5,6,2 To

secure state must be executed in both control units belonging to theequipment. To diminish the danger of unwanted commands due to

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misunderstandings, a text reminding of this feature will appearwhen command 5,6,2 To secure state is executed.

Executing command 5,6,2 To secure state in the remote-end equipment would dis-connect the the user from the remote end equipment. Therefore, the command isnot executed and the text Secure state is not allowed in remote end is returnedinstead.

Secure state and 64 kbit/s signal loopback are not allowed simultaneously. There-fore, the text Secure state is not allowed together with 64 kbit/s looping is returned if the user tries to activate the secure state when the 64 kbit/s signal is looped back tothe equipment.

When the equipment is in secure state, it sends an alarm indication signal AIS tothe remote-end equipment. Therefore, if the user tries to execute remote-end com-mands when the equipment is in secure state, the text No connection to remote-endis returned.

The execution of the command 5,6,2,1 To secure state and the cancellation of thesecure state are registered into the event register. If teleprotection commands aresupplied to the command inputs of an equipment that is in secure state , they areregistered.

5,7 Command output lockingThis control ensures that nothing can be done that would result in an unwanted command at the command output of the teleprotection equipment. This control isused instead of the secure state control when the user wants to ensure that nounwanted command can occur at the command output of the teleprotection equip-ment, but cannot lock the transmitter, because the access to the remote-end equip-ment must be retained.

By executing this command also in the remote-end equipment, it is possible toblock the transmission of teleprotection commands in both directions without los-ing the access to the remote-end equipment.

If the equipment has been forced to secure state by command ( 5,6,2 ) To securestate , the locking of the command outputs cannot be reset by command ( 5,7,1 ) Tonormal state

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Caution The effect of command output locking is control unit internal. Thismeans that if the equipment configuration includes two controlunits, the teleprotection commands can pass in both transmissiondirections of the system even if one of the control units is in statecommand outputs locked because the redundant control unit is stillin operation. This is explained in greater detail in the parts Oper-ation and Functional description of this manual. To block thetransmission of teleprotection commands in the direction con-sidered, the command 5,7,2 Lock outputs must be executed in bothcontrol units belonging to the equipment. To diminish the dangerof unwanted commands due to misunderstandings, a text remind-ing of this will appear when command 5,7,2 Lock outputs isexecuted.

Command output locking and 64 kbit/s signal loopback are not allowed simulta-neously. Therefore, the text Command output locking is not allowed together with64 kbit/s looping is returned if the user tries to lock command outputs when the64 kbit/s signal is looped back to the equipment.

In contrast to the controls Secure state and Transmitter locking , this control is alsoallowed in the remote-end equipment. In fact, locking of the command outputs atboth ends is recommended to make sure that no unwanted commands are pro-

duced. In doing so, the maintenance connection to both ends is retained and noteleprotection command can still pass through the system.

The execution of the command 5,7,2,1 Lock outputs and the cancellation of thecommand output locking are registered into the event register. If teleprotectioncommands are received by an equipment when the command output locking is on,they are registered.

5,8 Transmitter lockingThis control ensures that nothing can be done that would result in an unwanted command in the command output of the remote-end equipment. The control pro-cessor executes this command by forcing the outgoing 64 kbit/s to an all-onesstring. This control is used instead of secure state control when the user wants toensure that no unwanted command can occur at the command output of the re-mote-end equipment. In accordance with the nature of this control, its effect is per-manent, i.e. it can be reset only by Service Terminal command ( 5,8,1 ) Transmitterlocking: To normal state . The selection produces the following display:

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If the equipment has been forced to secure state by control ( 5,6,2 ) To secure state ,the locking of the outgoing signal cannot be removed by command ( 5,8,1 ) To nor-mal state .

Caution The effect of command output locking is control unit internal. Thismeans that if the equipment configuration includes two controlunits, the teleprotection commands can pass through the system inboth transmission directions even if one of the control units is instate transmitter locked because the redundant control unit is stillin operation. This is explained in greater detail in the parts Oper-ation and Functional description of this manual. To block thetransmission of teleprotection commands in the direction con-sidered, the command 5,8,2 Lock transmitter must be executed inboth control units belonging to the equipment. To diminish thedanger of unwanted commands due to misunderstandings, a textreminding of this will appear when command 5,8,2 Lock trans-mitter is executed.

Executing the command 5,8,2 Lock transmitter in the remote-end equipmentwould disconnect the the user from the remote-end equipment. Therefore, thecommand is not executed and the text Transmitter locking is not allowed in remote-end is returned instead.

Transmitter locking and 64 kbit/s signal loopback are not allowed simultaneously.Therefore, the text Transmitter locking is not allowed together with 64 kbit/s loop-ing is returned if the user tries to lock the transmitter when the 64 kbit/s signal islooped back to the equipment.

When the transmitter is locked, the equipment sends an alarm indication signal

AIS to the remote-end equipment. Therefore, if the user tries to execute remote-end commands when the transmitter is locked, the text No connection to remote-end is returned.

The execution of the command 5,8,2,1 Lock transmitter and the cancellation of thetransmitter locking are registered into the event register. If teleprotection com-mands are supplied to the command inputs of an equipment when the transmitterlocking is on, they are registered.

5,9 Remote-end controlsSee chapter 4 CONTROLLING THE TPS 64 SYSTEM.

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5.6 SettingsThe settings determine the operation of the equipment. They are saved in an elec-trically erasable nonvolatile memory and will therefore remain unchanged when

the battery voltage (power supply) is switched off. By command 6,6 , the settingscan be given default values.

When the user starts to change the settings of the TPS 64, the changes do not affectthe operation of the equipment right away. When changing the settings of theTPS 64, most of the changes must be confirmed with command ( 6,7 ) Confirm set-tings to make the new settings effective. This ensures that the operation of theequipment is always determined by a consistent group of settings. When the userconfirms the settings in order to take them into use, the consistency of the newsettings is checked. In case of any inconsistency, the user is alerted and the newsettings are not taken into use.

To understand the operation of the TPS 64, the user is encouraged to think of thesettings facility in the internal terms of the equipment. In the memory of theTPS 64 there are two memory areas reserved for the settings. These areas mightbe called effective settings and editing settings . Under normal operation their con-tents are identical. When the user starts to change settings, the editing settingsmemory area is affected. The display commands used to view the settings alwaysshow the editing settings . The effective settings determine the operation of theTPS 64 at any time. Upon execution of the command 6,7 Confirm settings , thecontents of the editing settings memory area is transferred into the effective set-tings memory area.

Starting to change the settings activates the run diagnostic test alarm with fault

status B. Running the diagnostic test with command ( 9,7 ) Diagnostic test will thendisplay: Settings unfinished . This alarm is reset by taking the new settings into usewith command ( 6,7 ) Confirm settings . Should it happen that the user does not wantto take the new settings into use, the alarm can be reset with command ( 6,8 ) Cancelsettings . The changes will then be lost and the display commands will again showthe effective settings. What actually happens when command 6,8 Cancel settingsis executed, is that the contents of effective settings is transferred into the editingsettings .

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Settings are accessed by selecting the main menu item 6, which produces the fol-lowing display:

6,1 Service optionsThe service options affect the functions relating to the fault monitoring of the Tele-protection Signalling Equipment and to the use of the Service Terminal. Theselection provides the following display:

Any change of service settings becomes effective immediately. The execution of command 6,7 Confirm settings is not needed.

6,1,1 Service interface baud rateThe baud rate between the Service Terminal and the equipment is set as desired.

Selection 0 (6,1,1,0 ) displays the selected baud rate. The desired baud rate isselected within the given limits. Possible rates are 75, 150, 300, 600, 1200, 2400,4800, 9600 bit/s. Sample reply:

The execution of command 6,6 Default settings does not affect the setting of thebaud rate. Delivery setting: 9600 .

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6,1,2 AddressThe equipment is given an individual address that is used when the equipment isconnected to the same bus together with other pieces of equipment. The defaultvalue for the address is 4095, which is a common address for all equipment.

Selection 0 (6,1,2,0 ) displays the address given to the equipment. Sample reply:

20

By selection 1 (6,1,2,1 ), a text prompting for the address selection is obtained:

The execution of command 6,6 Default settings does not affect the setting of address. Delivery setting: 1.

6,1,3 Rack alarm functionsUnder this function, the operating mode for the rack alarms is selected:

Selection 0 (6,1,3,0 ) displays the selected operation mode for the rack alarms.Sample reply: Normal .

Selection 1 (6,1,3,1 ) Normal activates the normal mode of operation for the rack alarms.

Selection 2 (6,1,3,2 ) is used when rack alarms are to be totally prevented, e.g. dur-ing the installation stage.

By selection 3 (6,1,3,3 ), urgent alarms (A) are changed into less urgent alarms (B).This can be used e.g. during the test operation stage of the equipment.

The execution of command 6,6 Default settings does not affect the setting of therack alarm functions. Delivery setting: Normal

6,1,4 Rack alarm delayUnder this function, the time constant for rack alarm filtering is affected. The rack

alarm turns active when the alarm condition has continued for a set time constant.

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The rack alarm is removed when normal condition has continued for the alarmconcerned for the time set without a break.

In a changing alarm condition, the reading of the time constant counter is alwaysincreased during an alarm and when the alarm is gone, the counter readingremains. If the normal condition continues for the set time constant, the counter isreset and time counting is restarted. Thus, the alarm turns active when it has lastedthe time of a preset time constant, either without a break or with breaks.

By selection 0 (6,1,4,0 ), the preset time constant for rack alarms is displayed.Example: 3. The delay is displayed in seconds.

By selection 1 (6,1,4,1 ), a text guiding the selection of time constant for rack alarms is displayed:

The execution of command 6,6 Default settings does not affect the setting of therack alarm delay. Delivery setting: 3.

6,1,5 PA1 functionUnder this function, the alarm signal to be connected to Programmable Alarm out-put PA1 is selected. The output of PA1 is also active when the control unit supplyvoltage is lost due to a failure in the unit s power supply block.

Selection 0 (6,1,5,0 ) displays the logic combination of alarms selected to be usedfor the control of alarm output PA1.

By selection 1, alarm A is selected to directly control the alarm output PA1; byselection 2, alarm B; by selection 3, alarm D and by selection 4 alarm S.

By selection 5 (6,1,5,5 ), the combined alarm A & S is selected for the output: alarmPA1 is obtained when both alarm A and alarm S are active simultaneously. Theselection means that the output is active when a serious fault preventing the oper-ation of the equipment is detected.

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Selection 6 (6,1,5,6 ) activates the output every time a fault is detected in the equip-ment.

Selection 7 (6,1,5,7 ) activates the output under every fault condition (also when thefault has been detected elsewhere, e.g. AIS).

The execution of command 6,6 Default settings does not affect the setting of thePA1 function. Delivery setting: A.

6,1,6 PA2 functionUnder this function, the signal to be connected to Programmable Alarm outputPA2 is selected. The output is similar to the PA1 output except that it is not activeduring a control unit power fault.

Selection 0 (6,1,5,0 ) displays the logic combination of alarms selected to be usedfor the control of alarm output PA2.

By selection 1, alarm A is obtained for the output; by selection 2, alarm B; byselection 3, alarm D and by selection 4, alarm S.

By selection 5 (6,1,6,5 ), the combined alarm A & S is selected for the output: alarmPA2 is obtained when both alarm A and alarm S are active simultaneously. Theselection means that the output is active when a serious fault preventing the oper-ation of the equipment has been detected.

Selection 6 (6,1,6,6 ) activates the output every time a fault is detected in the equip-ment.

Selection 7 (6,1,6,7 ) activates the output under every fault condition (also when thefault has been detected elsewhere, e.g. AIS).

The execution of command 6,6 Default settings does not affect the setting of thePA2 function. Delivery setting: .

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6,1,7 Control time-outUnder this function, the time during which the controls are active without refresh-ing is selected.

Selection 0 (6,1,7,0 ) displays the time-out selected for the controls. Another selec-tion within the allowed limits sets the time-out in minutes.

The execution of command 6,6 Default settings does not affect the setting of con-trol time-out. Delivery setting: 10 .

6,1,8 Data hybrid configurationWith the data hybrid, it is possible to connect the service interface and the datainterface.

Selection 0 (6,1,8,0 ) displays the operating mode of the data hybrid. The configur-ations of the data hybrid have been presented in the Functional Description part of this operating handbook.

By selection 1 (6,1,8,1 ), the service interface and the data interface are connected.

By selection 2 (6,1,8,2 ), the connection between the service interface and the datainterface is disconnected.

The execution of command 6,6 Default settings does not affect the data hybridconfiguration. Delivery setting: OFF .

6,1,9 TPS 64-specificUnder this item the user can affect the behaviour of the teleprotection alarm output

and the response of the TPS 64 to some fault conditions. The selection returns thefollowing menu:

6,1,9,1 TPA filtering

By selecting 6,1,9,1 TPA filtering , the user can affect the filtering of the telepro-tection alarm output. If the equipment has two channel units, i.e. both channel

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groups are in use, the same filter affects both teleprotection alarm outputs. Adetailed description of the filtering can be found in the part Functional descriptionof this manual. Selection 1 displays the menu:

By selection 6,1,9,1,0 Display the recent values of the filter s on-delay and off-delay can be viewed. Sample display:

Selection 6,1,9,1,1 Modify on-delay gives the following display:

Now the user can give the desired delay within the specified limits 0...30 seconds.

Selection 6,1,9,1,2 Modify off-delay gives a corresponding display prompting theuser to give the off-delay:

The execution of command 6,7 Confirm settings is not required to change the TPAfiltering delays. The execution of command 6,6 Default settings does not affectthese two delays. Delivery setting for both delays: 5 seconds .

6,1,9,2 Fault consequencesBy selecting 6,1,9,2 Fault consequences the user can affect the consequence of some fault conditions. The selection returns the menu:

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6,1,9,2,1 BER > 1E 3 consequencesSelection 6,1,9,2,1 BER > 1E 3 enables the user to determine what will happen if the error rate of the incoming 64 kbit/s signal exceeds 1E 3.The selection returns the menu:

Selection 0 displays the current mode of operation. Example:

If the user selects 1, the command outputs will be locked at BER > 1E 3. Becausethe teleprotection commands cannot be transmitted when the command outputsare locked, the status of the fault will be AS.

If the user selects 2, the command outputs are not locked in case of BER > 1E 3.Because the teleprotection commands can be transmitted at such a low error rate,the fault status will now be B. The fact that the main function of the TPS 64 is notaffected by error rates lower than 1E 3 is due to the error correction applied inreception. Therefore, when selecting this mode of operation, the user shouldensure that the number of errors corrected at reception has the default value 5. If

the receiver has been set to accept less than 5 errors, it would be inappropriate touse the alarm status B because the probability of missing commands could exceedthe value being acceptable in the particular application.

To change the consequence of the fault BER > 10E 3 , the execution of com-mand 6,7 Confirm settings is not required. The execution of command 6,6Default settings does not affect this setting. Delivery setting: 2 Command outputsnot locked fault status B .

6,1,9,2,2 Frame alignment lost consequencesSelection 6,1,9,2,2 Frame alignment lost enables the user to determine what

happens if the error rate of the incoming 64 kbit/s signal is so high that the framealignment is considered to be lost. The selection returns the menu:

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6,1,9,4 Answer remindersBy means of answer reminders the user can determine whether excessive guidingtext is added to the answers returned by the TPS 64 or not. This facility isexplained in full detail in chapter 4 CONTROLLING THE TPS 64 SYSTEM.The purpose of the following text is only to represent the menus and to explainhow to switch the various reminders on and off Selection 6,1,9,4 returns the fol-lowing display:

Selection 0 displays the states of the reminders. The following sample displaycorresponds to the delivery settings:

Selections 1...4 enable the user to affect the reminders one at a time. They all returnthe following display:

Selection 0 can be used to display the state of the selected reminder. Selection 1 isused to switch the reminder on so that the corresponding tag will be visible on theanswers, and selection 2 is used to switch it off .

To change the value of any answer reminder, the execution of command 6,7 Con-firm settings is not required. The answer reminders are not affected by command6,6 Default settings . The delivery settings are shown in the previous sample dis-play.

6,2 Equipment configuration

Under this function, the control unit is given the equipment configuration of theTeleprotection Signalling Equipment, so that the monitoring of equipment status

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can function properly in all situations. The possible equipment configurations of Teleprotection Signalling Equipment TPS 64 are described in part Operation of this operating handbook.

By command ( 6,6 ) Default settings , the equipment configuration is set to corre-spond to the equipment configuration at the moment of the command execution. If there are no channel units in the cartridge, their number is set to one. When thecustomer receives the control unit, its equipment configuration settings corre-spond to an equipment comprising one control unit and one channel unit. There-fore, the need to change the settings under the item 6,2 typically arises when otherequipment configurations have to be implemented. Even then, the user can firstinsert the desired additional units into the cartridge and then execute the command6,6 Default settings . But do not forget that doing so will affect a major part of thesettings of the TPS 64, not only the equipment configuration.

By selection 0 (6,2,0 ), the equipment configuration is displayed. Note that the dis-played configuration corresponds to the editing settings memory area and not tothe effective settings, which differ from each other if the configuration has beenchanged since the command ( 6,7 ) Confirm settings was last executed. Example:

6,2,1 Cartridge type designationSelection 6,2,1 Cartridge ID returns the following menu:

By selection 0 (6,2,1,0 ), the type designation in effect is displayed. By selection 16,2,1,1 , the cartridge type designation CF 24280 can be set. By selection 26,2,1,2 , the cartridge type designation CF 24280.08 can be set. The cartridge type

designation can be seen on a sticker on the cartridge side wall.

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6,2,2 Control unit locationBy this selection, the control unit is told whether it is in location A or B. LocationA is the leftmost location when the cartridge is viewed from the front and locationB is adjacent to location A. The selection gives the following display:

The selection made by the user is compared with the actual location of the unit. If they do not correspond to each other, the TPS 64 displays the fault message Wrongcontrol unit location , and the settings remain unchanged. In other words, a contra-diction between the actual unit location and this setting can only arise when theunit is transferred from location A to location B or conversely. Doing so typicallycauses several alarms. One them, installation error, is then due to wrong controlunit location.

6,2,3 Control unit BThis function, which can be used only when control unit A settings are being per-formed, indicates whether another control unit B belongs to the equipment con-figuration. The selection gives the following display:

6,2,4 Channel unit 2Under this function, the control unit is told whether the equipment configurationalso comprises channel unit 2, i.e. whether command channels 5...8 are also in use.Even if channel unit 2 is not in the cartridge, setting 1 Belongs to config can beused. This causes, however, the alarm missing unit when the settings are later con-firmed by command ( 6,7 ) Confirm settings .

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channel groups are used, different teleprotection codes must be used to ensure thatthe receiver does not confuse the channel groups with each other. In channel group1 (command channels 1...4) one of teleprotection codes 1...8 is selected and inchannel group 2 (command channels 5...8) one of teleprotection codes 9...16 isselected. A selection deviating from this principle will later prevent the confirma-tion of the settings. In addition, it should be taken into account that different codesmust be used in different transmission directions. Thus, if two channel groups areused, four different teleprotection codes must be used in the system. Deviationfrom this principle also prevents confirmation of changed settings. The selectionprovides the following display:

By selection 1 (6,4,1,1 ), the teleprotection code identification number used forencoding the states of command channels 1...4 (channel unit 1) can be set and byselection 2 (6,4,1,2 ), the teleprotection code number of command channels 5...8(channel unit 2) can be set. Selection 1 provides the following display:

In connection with this display, the teleprotection code identification number 1...8(16) can be given. The maximum value is 8 if two channel groups will be used and16 if only one channel group will be used. By selection 0, the setting made can bechecked. It should be noted that selection 0 displays the code in effect only if thecode number has not been changed since command ( 6,7 ) Confirm settings wasexecuted.

When command ( 6,6 ) Default settings has been given, the teleprotection codeidentification number in the Tx direction of channel group 1 (command channels1...4) is set as 1 and the code number in the Tx direction of channel group 2 (com-mand channels 5...8) is set as 9. When command 6,9,6 Default settings has beengiven in the remote-end equipment, the teleprotection codes mentioned above areset as Rx-direction codes.

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6,4,2 Number of channel groupsUnder this function, the number of channel groups in use is confirmed. If this set-ting does not correspond to the equipment configuration settings under item ( 6,2 ),the settings cannot be confirmed with command 6,7 Confirm settings The mess-age Wrong number of channel groups will be obtained. The selection provides thefollowing display:

By selection 0 (6,4,2,0 ), the number of channel groups in use is displayed and byselections 1 (6,4,2,1 ) and 2 (6,4,2,2 ), the number of channel groups is set as desired.When command 6,6 Default settings is given, the number of channel groups is setto correspond to the number of installed channel units at the moment the commandis executed. If the equipment comprises no channel units, the number of channelgroups is set as one.

6,5 Receiver settingsBy the receiver settings, the number of Rx direction channel groups and the tele-protection codes to be used are determined. In addition, they can be used to affectthe operating mode of the command output controls and the number of bit errorsper message accepted at the reception of the incoming 64 kbit/s signal. Here likeelsewhere in this manual the expression to accept is used interchangeably with theexpression to correct to indicate that received messages are considered valid evenif they are corrupted by errors.

When the changed settings are later confirmed, a change in the Rx direction tele-protection codes or in the number of channel groups causes the alarm run diagnos-tic test if the new teleprotection code identification numbers or the number of channel groups do not correspond to the incoming signal teleprotection codeidentification numbers and the number of channel groups. Executing the diagnos-tic test with command 9,7 gives a message Invalid incoming signal . If desired, thenumber of channel groups and the teleprotection code(s) detected in the incomingsignal can be seen by executing the command 9,8 Display incoming signal Thealarm can be removed by changing the Tx direction settings of the remote-endequipment to correspond to the Rx direction settings of the near-end equipment orvice versa.

Selection ( 6,5 ) provides the following display:

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Command 0 (6,5,0 ) displays the number of channel groups and the teleprotectioncode(s) used by the receiver together with the maximum number of errors cor-rected at reception.

6,5,1 Code settingUnder this function, the teleprotection code(s) used by the Teleprotection Signal-

ling Equipment in the Rx direction is (are) selected. If only one channel group(channels 1...4) is used, one of teleprotection codes 1...16 is selected. If two chan-nel groups are used, different teleprotection codes must be used to ensure that thereceiver does not confuse the channel groups with each other. In channel group 1(command channels 1...4), one of teleprotection codes 1...8 is selected and inchannel group 2 (command channels 5...8), one of teleprotection codes 9...16 isselected. A selection deviating from this principle will later prevent the confirma-tion of the settings. In addition, it should be taken into account that different tele-protection codes must be used in different transmission directions. Thus, if twochannel groups are used, four different teleprotection codes must be used in thesystem. Deviation from this principle also prevents confirmation of the changedsettings. The selection provides the following display:

By selection 1 (6,5,1,1 ), the teleprotection code number used in the reception of command channels 1...4 (channel unit 1) can be set and by selection 2 (6,5,1,2 ),correspondingly, the teleprotection code number used in the reception of com-mand channels 5...8 (channel unit 2) can be set. Selection 1 provides the followingdisplay:

In connection with this display, the teleprotection code identification number1...8(16) can be given. The maximum value is 8 if two channel groups will be usedand 16 if only one channel group will be used. By selection 0, the setting made canbe checked. It should be noted that selection 0 displays the code in effect only if thecode number has not been changed since command ( 6,7 ) Confirm settings wasexecuted.

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When command ( 6,6 ) Default settings has been given, the teleprotection codeidentification number in the Rx direction of channel group 1 (command channels1...4) is set as 2 and the code number in the Rx direction of channel group 2 (com-mand channels 5...8) is set as 10. When command 6,9,6 Default settings has beengiven in the remote-end equipment, the teleprotection codes mentioned above areset as Tx-direction codes.

6,5,2 Number of channel groupsUnder this function, the number of channel groups in use is specified. If this set-ting does not correspond to the equipment configuration settings under item ( 6,2 ),the settings cannot be confirmed with command 6,7 Confirm settings The mess-age Wrong number of channel groups will be obtained. The selection provides thefollowing display:

By selection 0 (6,5,2,0 ), the number of channel groups in use is displayed and byselections 1 (6,4,2,1 ) and 2 (6,5,2,2 ), the number of channel groups is set as desired.When command 6,6 Default settings is given, the number of channel groups is setto correspond to the number of installed channel units at the moment the commandis executed. If the equipment comprises no channel units, the number of channelgroups is set as one.

6,5,3 Number of accepted errorsThis function is used to determine how many errors are accepted in the received64-bit message. If the number of errors in the teleprotection message (codeword),received by the receiver, exceeds the number given here, the message is con-sidered non-acceptable . Selection ( 6,5,3 ) provides the following display:

By selection 0, the number of acceptable errors in the selected channel group isdisplayed. The displayed value corresponds to the acceptable number of errors ineffect only if it has not been changed since command 6,7 Confirm settings wasexecuted.

By selection 1, the number of corrected (accepted) errors is set as the default value5, which is also set by command 6,6 Default settings . This number of acceptableerrors has been used as the basis for the definition of the Teleprotection Signalling

Equipment performance characteristics.

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By selection 2, the number of acceptable errors can be given a value between 0...7.Selection 2 provides the following display:

Note When the number of acceptable errors is given a value deviatingfrom the default value, it should be especially noted that increasingthis number results in a very considerable increase in the Probabilityof Unwanted Command, P UC . This issue is dealt with in greater detailin the Operation part of this Operating Handbook.

6,5,4 Command output controlsBy this function, the operating mode of the command output controls, i.e. the waycommand outputs respond to incoming signal events, can be affected. These set-tings determine e.g. what happens if, in the middle of a command, a message isreceived which contains more than the accepted number of errors. The selectableoperating modes of the command output controls are described in the Operationpart of this Operating Handbook. Here, only the setting of the desired operatingmode and control parameters by means of the Service Terminal is described.

The setting modifications can be directed either to each command channel separ-ately or to one channel group at a time. All eight possible command channels canalso have the same operating mode for the command output controls, but the set-ting must be made one channel group at a time. Selection ( 6,5,4 ) provides the fol-lowing display:

By selection 0 (6,5,4,0 ), the command output controls and parameter values of allcommand channels are displayed. The display corresponds to the settings in effectonly if the control mode or parameters have not been changed since command6,7 Confirm settings was executed. Example:

Note All parameter values indicate time as multiples of the TeleprotectionSignalling Equipment frame duration 1.25 ms. The duration corre-

sponding to the parameter value is always obtained by multiplying theparameter value with the frame duration 1.25 ms.

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The first column gives the number of the command channel , the second col-umn gives the number of control mode . The following three columns givethe parameter values , and relating to the control mode selected.

In the sample display, the control mode number of command channel 1 is 1. Sincecontrol mode 1 only has one parameter, the columns of parameters not used in con-trol mode 1 contain three asterisks ***. The value of parameter in commandchannel 1 is 40, which corresponds to the minimum duration of 50 ms. The com-mand outputs of command channels 2 and 3 have the same control mode and allthree parameters have the same values. Command channel 4 also uses controlmode 2 but there parameter has the value 150.

6,5,4,1/2 Selection of channel or channel groupBy selection 1 (6,5,4,1 ), the number of the control mode used and its parameterscan be set for one command channel at a time. The selection provides the follow-ing display:

By selection 2 (6,5,4,2 ), the number of the control mode to be used and the para-meters can be determined for all four command channels belonging to same chan-nel group at a time, thus saving the user from the effort of changing each channelseparately. Naturally, this command can be used only if all four channels will haveidentical control modes and parameters. This selection gives the following dis-play:

6,5,4,1/2,1/2 Setting of control mode and parametersRegardless whether you modify these settings for each command channel separ-ately or for all command channels belonging to same channel group at a time,changing the parameters proceeds in the same way. First, the following display isobtained:

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6,5,4,1/2,1 Setting of parameters for control mode 1When number 1 is selected in the previous display, control mode number 1 isselected and the following display is obtained for the setting of parameters relatingto this control mode:

By selection 0, the command output control modes and parameters of all com-mand channels are displayed with the same format as with command 6,5,4,0 whichwas explained before. The values in this display correspond to the settings in effectonly if no changes have been made since command 6,7 Confirm settings was lastexecuted.

By selection 1, the parameter can be given a value corresponding to the defaultvalue: , which corresponds to the command minimum duration 50 ms.

By selection 4, the desired value can be given to parameter . The selection pro-vides the following display:

The parameter value is given as an integer, the maximum value being 250. Theminimum value is 1. Giving a value outside of these limits produces the errormessage: illegal command .

6,5,4,1/2,2 Setting of parameters for control mode 2If control mode 2 is selected to be used, the following display is obtained:

By selection 0, the command output control modes and parameters of all com-mand channels are displayed with the same format as with command 6,5,4,0 whichwas explained before. The values in this display correspond to the settings in effectonly if no changes have been made since command 6,7 Confirm settings was lastexecuted.

By selection 1 all three parameters can be given the default values which are: and

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By selections 2, 3 and 4 the parameters can be given values other than the default.All selections give the display:

The parameter value is given as an integer, the maximum value being 250. Theminimum value is 1. Deviating from these limits produces the error messageillegal command .

No change in the editing settings occurs until some of the parameter values , or have been changed. If control mode 1 is replaced by control mode 2, it is necess-

ary to define a value for both the parameter and the parameter before the set-tings can be confirmed. This means that the user has to execute both the command2 Set p and 3 Set q in order to enable the confirmation of the settings. Of course, theexecution of command 1 Default alone is enough to make confirmation possible.If an undefined parameter is found when the settings are checked in conjunctionwith the execution of the command 6,7,147 Confirm settings , the parameters need-ing definition are displayed.

If the settings unfinished alarm has not been initiated before, the execution of anyof the parameter definition commands will do it. The selection of control modethat precedes the parameter definition does not cause any change in the editingsettings , instead, the selected control mode is stored into the editing settings whenthe first parameter definition command is executed.

6,6 Default settings

Because the execution of default settings replaces a major part of the previous set-tings that may have required a great effort to edit, the unintentional execution of the command Default settings is prevented by the following display which requiresthe user to confirm the command:

The command can now be cancelled by keying UP when working with the ServiceTerminal or with three back spaces BS BS BS RET when working with a Service Ter-minal Emulator.

The default settings are taken into use immediately after the confirmation givenhere. The command 6,7 Confirm settings is not needed.

By the default settings, the equipment is set into the following mode:

1. All settings under item 6,1 Service options remain unchanged.

2. The equipment configuration is set to correspond to the cards present in thecartridge at the execution moment of the command. If there are no channelunits in the cartridge, their number is set as one.

3. The timing mode of the 64 kbit/s interface is not affected.

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4. The number of transmitter channel groups is set to correspond to the numberof channel units in the cartridge. When the default settings are taken into usein the near-end equipment, the Tx direction teleprotection code of channelgroup 1...4 will be code number 1 and the teleprotection code of channelgroup 5...8 will be code number 9. When the default settings are taken intouse in the remote-end equipment, the Tx direction teleprotection code of channel group 1...4 will be code number 2 and the teleprotection code of channel group 5...8 will be code number 10.

5. The number of receiver channel groups is set to correspond to the number of channel units in the cartridge. When the default settings are taken into use inthe near-end equipment, the Rx direction teleprotection code of channelgroup 1...4 will be code number 2 and the teleprotection code of channelgroup 5...8 will be code number 10. When the default settings are taken intouse in the remote-end equipment, the Rx direction teleprotection code of channel group 1...4 will be code number 1 and the teleprotection code of channel group 5...8 will be code number 9. The receiver is set to accept mess-ages corrupted by up to 5 errors. In all command channels, the command out-put control mode is set as 1 and the parameter of this control mode is given thevalue .

6. Registration of events is not affected. The settings relating to registration canbe found in connection with other registration functions under item ( 8,1,1 ).

7. Summertime practice is not affected. This setting can be found under item11,1 Real time clock

The execution of the command 6,6,147 Default settings Confirm is registered intothe event register.

6,7 Confirm settingsThe changes of the settings are not taken into use until they are confirmed with thecommand 6,7 Confirm settings . The TPS 64 was provided with this facility toenable the checking of the new settings before taking them into use, among otherthings. Note that the checking of the new settings is not possible before all changeshave been made because during the changing work inconsistent settings combina-tions inevitably occur.

The unintentional execution of this command has been prevented by asking theuser to confirm the command itself. The following display will appear:

The command can now be cancelled by keying UP when working with the ServiceTerminal or with three back spaces BS BS BS RET when working with a Service Ter-minal Emulator.

When this command is executed, the new settings are checked before they aretaken into use. If they are not consistent, they can t be taken into use. An errormessage will appear helping the user to locate the invalid setting. If the settingscontain several inconsistencies, only the first one encountered is reported.Accordingly, when the problem has been fixed and the settings are confirmedagain, a different error message may appear. The error messages are very self-explanatory. Therefore, they are not explained here.

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If the settings have not been edited since the previous execution of this command,it will not be executed. The user will get the the following message:

Note, however, that the execution of this command does not necessarily mean thatthe effective settings are changed. It is possible that the settings have been editedwithout actually changing them. The current editing settings are not comparedwith the effective settings when the decision is made to return the above message, itis the settings unfinished alarm that determines whether the effective settings arereplaced with the editing settings or not.

The execution of the command 6,7,147 Confirm settings Confirm is registeredinto the event register.

6,8 Cancel settingsAs soon as some of the settings requiring confirmation have been changed, thediagnostic alarm Settings unfinished will be initiated. The purpose of this alarm isto remind the user that the settings have been modified since the previous execu-tion of the command 6,7 Confirm settings . The user might not want to take themodified settings into use. In this case the changes must be cancelled with the 6,8Cancel settings . There are no other means to make the alarm Settings unfinished disappear. What actually happens when this command is executed is that the edit-ing settings are overwritten with the contents of the effective settings . When thishas been done, the settings displayed with various settings display commandsagain coincide with the actual state of the TPS 64.

6,9 Remote-end settingsSee Chapter 4 CONTROLLING THE TPS 64 SYSTEM.

When modifying the settings of the remote-end equipment, the timing mode of the64 kbit/s should not be changed because the timing mode must be correct if theuser has access to the remote-end equipment and changing the timing mode wouldthus disconnect the two TPS 64 terminals from each other. If the user tries tochange the timing mode in the remote-end terminal, the command is not executed.The following message is returned instead:

The user might find the location of the Remote-end tag somewhat unexpected.This is quite normal, however, and is due to the fact that this message belongs tothe short answers .

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5.7 MeasurementsUnder this function the user can measure the supply voltages of the control unit.

7,1 Voltage measurementsSelection 1 gives the following display:

Both selections ( 7,1,1 ) and ( 7,1,2 ) provide the following display:

Selection 1 displays the voltage. Exceptionally, the Remote-end)/(Near-end tagis not displayed in conjunction with this command. Selection 2 7,1,1,2 Calibra-tion gives the following display:

The user is expected to type the measured supply voltage in millivolts and withoutsign.

7,9 Remote-end measurementsSee Chapter 4 CONTROLLING THE TPS 64 SYSTEM.

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5.8 StatisticsUnder this function, the registration of command events and battery voltage out-ages and the CPU-reset counter can be found. Deviating from the practice fol-

lowed with other settings, the settings relating to registration are placed under thissame item. These settings are taken into use immediately when modified. Theexecution of the command 6,7 Confirm settings is not required. Selection ( 8)Statistics provides the following display:

8,1 Event registrationBy this function, the event register can be viewed, registration settings can bechanged and the register can be erased. The selection provides the following dis-play:

8,1,1 Registration settingsBy this function, the operation of the registration can be affected. The selectionprovides the following display:

By means of the registration settings only the registration of command events canbe affected. Battery voltage breaks, counter resets and changes of time are alwaysregistered.

By selection 8,1,1,1 Both directions , the registration is set to function so that thestate changes of both command outputs and command inputs are registered.

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By selection 8,1,1,2 Command outputs only the TPS 64 is set to register the statechanges at command outputs only.

By selection 8,1,1,3 Command inputs only the TPS 64 is set to register the statechanges at command inputs only.

By selection 8,1,1,4 No registration the command registration is inhibited in bothtransmission directions. This mode of operation may be desirable e.g. in applica-tions where commands are transmitted extremely frequently. This is possible forexample in conjunction with experimental installations.

The changes of the registration settings are taken into use immediately. They donot require the command 6,7 Confirm settings . Registration settings are notaffected by command 6,6 Default settings Delivery settings: Both

8,1,3/4 Viewing of event register

By these selections, the event register can be viewed. By selection 8,1,3 Startviewing with newest event the viewing of the event register is started from thenewest event in the register. By selection 8,1,4 Start viewing with oldest event ,viewing is started from the oldest event in the beginning of the register.

Irrespective of the way the viewing is started, the viewing itself always takes placein the same way. Each of the selections described above first gives the viewinginstructions display:

Viewing is started by writing 0 RET. Then the newest or the oldest event is dis-played depending on the way viewing was earlier started. When viewing has beenstarted, it is possible to move events by specifying the jump length. This is doneby writing RET to move events forward and by writing RET to moveevents backward. Here is an integer within the range . If the specified

jump length would lead beyond the beginning or the end of the register, the oldestor the newest event is displayed, respectively. The following is a sample displaythat is obtained if the viewing has been started by selection 8,1,3,0 Start viewingwith newest event .

Here, a state change has occurred simultaneously at the command outputs 1, 3 and4 from the state no command into the state command . The topmost line shows thatthis is the newest event in the register. The time of occurrence is displayed withone ms resolution for command events. Other events are registered and displayedwith a resolution of one second.

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If the EC summertime practice has been selected, the equipment will automati-cally change from summertime to wintertime and vice versa. The change fromsummertime to wintertime means that the time is decremented by one hour. Thefollowing pair of events is then stored into the register:

and

Now, if command events should occur during the two-hour time period from02:00:00 summer time to 03:00:00 winter time, the events belonging to the firsthour of this period can be distinguished from the events belonging to the secondhour because they are separated by these two events. The corresponding events arealso stored in conjunction with skipping from wintertime to summertime even if the problem described above is then not present.

If the codeword counters are reset, the following register entry will be stored:

The corresponding events are stored when the other statistical counters are reset.The event labels are then: Second counters reset and Octet dist ounter reset

A battery voltage outage causes the following pair of events to be stored into theregister:

If the moment of skipping from summertime to wintertime coincides with a bat-tery voltage outage, it is done immediately after the battery voltage has been

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restored. If the user changes time or date so that the border between summertimeand wintertime is crossed, the equipment evaluates whether the new point of timebelongs to summertime or to wintertime and sets an internal flag to match theresult of the evaluation. The automatic skipping is ignored in this case.

Some important Service Terminal commands executed by the user are also regis-tered. This makes it possible to verify afterwards when the settings were changedor the main function of the TPS 64 was inhibited. The following is a list of thesecommands:

6,6 Settings : Default settings6,7 Settings Confirm settings5,2,2 Controls 64 kbit/s looping: Loop to equipment5,2,1 Controls 64 kbit/s looping: To normal state5,6,2 Controls Secure state: To secure state5,6,1 Controls: Secure state: To normal state5,7,2 Controls: Command output locking: Lock outputs5,7,1 Controls: Command output locking: To normal state5,8,2 Controls: Transmitter locking: Lock transmitter

If the registration-related settings are changed, the change is registered. Forexample, if the old setting is Both and the user executes the command 8,1,1,2 Com-mand outputs only , the following event is registered:

8,1,6 Showing free space in registerBy selection 8,1,6 Show free memory , a display is obtained that shows how muchfree space is available in the event register. The amount of free space is displayedas a number of command events and as a relative proportion of free space in theEEPROM reserved for the register.

In the sample display the register is practically empty and contains only one eventwhich indicates the time and date of the register erasure.

8,1,7 Erasing of registerBy selection 8,1,7 Erase register completely the EEPROM reserved for the eventregister can be erased.

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