Delta DVP 14SS PLC Advanced Commands

Delta DVP 14 SS

Advanced Commandswww.nfiautomation.org

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BMOVUsed to move block of information between data registers.

In the following example:

D0 ~ D4 will move to D10 ~ D14 when M0 is TRUE

Command Syntax: BMOV

Exercise1. Device a ladder program that will continuously move Block of values

from D0 ~ D5 to D400 ~ D405 after every 15 minutes. This is similar to

back up of information for every 15 minutes in case of any data loss.

FMOVUsed to move information from one data register to the block of

data registers.


D0 will move to D10 ~ D14 when M0 is TRUE

Command Syntax: FMOV

CJ- Call JumpUsed to skip the ladder by calling the Pointer


When M2 is FALSE, program will behave normally.

When M2 is TRUE, the ladder from 6 to 11 will not be scanned by PLC

Command Syntax: CJ

ExerciseDevice a ladder program to skip the punching by Y0 if the object is

bigger. Use Call Jump command to skip the punching operation

INV- Inverse Used to invert the logic behind it

Command Syntax: INV

In ladder 0, if X0 is TRUE Y1 will be FALSE and vice versa

So ladder 2 represent NAND Gate where as ladder 7 and 11

represents NOR Gate

So basically INV is analogous NOT Gate in digital logics.

ExerciseDevice a ladder program for the following Boolean algebra: (^

represent bar (NOT) operation)

Y0 = (X0.X1)^ + (X2.X3)^

Ladder Program:

MC-MCRMaster Control – used to enable and disable the Zone of ladders

Command Syntax: MC N0

If X27 is TRUE, the zone from ladder 4 to ladder 14 will be enable and

instruction will work as per the logic

If X27 is FALSE, the zone from ladder 4 to ladder 14 will be disabled and all

OUT bits will get FALSE but the SET bit will retain it’s state.

ExerciseThere are 3 groups participating in the quiz game: pupils, high school students and professors. If

they want to get the chance of answering the question from the host, they must press the answer

button on their table first. Other groups’ pressing will be invalid if any group gets the chance

successfully

• There are 2 answer buttons for the

pupil group and professor group

and 1 answer button for the high

school student group. In order to

give preferential treatment to the

pupil group, Y0 will be ON if any

one of X0 or X1 is pressed.

However, in order to limit the

professor group,Y2 will be ON

when X3 and X4 are pressed at the

same time. For the high school

student group, Y1 will be ON when

X2 is pressed.

• If the host presses X5 (Reset NC

button), Y0, Y1 and Y2 will be OFF.

ExerciseLadder Program:

PWMUsed to generate train of Pulses

Command Syntax: PWM

When Y0 gets ON, Y1 will generate pulses with the ON time = 1 seconds

and OFF time = 0.5 sec. In other words duty cycle is 66% and cycle time is

1.5 seconds

ExerciseGenerate the train of 500 pulses for Y1. (On time 1 second

and Cycle time 1.5 seconds)

Ladder Program:

When X0 gets ON, Y1 will generate pulses with the ON time = 1

seconds and OFF time = 0.5 sec.

In ladder 9, the falling edge of Y1 will increment D1 everytime when

the pulse falling edge comes. When the number of pulses is

equivalent to 15, M0 gets TRUE and stops the train of pulses.

In ladder 21, falling edge of X0 is used to reset the M0

Retentive TimerWhich can hold the time on power failure

Command Syntax: TMR

Create a Timing application such that when X1 is pressed Y0 is ON for 10 seconds. In case

X1 is turned OFF in between or Power failure may occur. The timer should resume the time

from where it gets interrupted.

Exercise

SequencerUsed to make sequence of output by accessing word output

Command Syntax: MOV HXX K4Y0

Ladder Program:

In the ladder 0 & 6, using X0 we moved H5 and H10 to K4Y0., which

changes the states of output file and following table explains how:

Decimal Y3 Y2 Y1 Y0

5 0 1 0 1

10 1 0 1 0



Exercise 1Turn on the output in sequence

shown

Ladder Program:



Exercise 2Turn on the output in the

sequence shown

Ladder Program:

Step CommandUsed to perform the operation in a sequential way without

lose of steps even on power loss

Command Syntax: STL S0

ExerciseDesign a traffic light program for Y0 (Red- 5 Seconds), Y1 (Yellow- 2

seconds) and Y2 (Green- 10 seconds) using Step commands.

ExerciseDesign a traffic light program for Y0 (Red- 5 Seconds), Y1 (Yellow- 2

seconds) and Y2 (Green- 10 seconds) using Step commands.

Ladder Program:

Enabling the abnormal situation alarm and draining water from the reservoir when

the level is above the upper bound.

Enabling the abnormal situation alarm and pouring water into the reservoir when the

level is below the lower bound.

Enabling the mechanical failure alarm if the upper bound sensor X0 is still ON after

draining water for 10 minutes.

Enabling the mechanical failure alarm if the lower bound sensor X1 is still ON after

pouring water for 5 minutes.

Resetting all the alarms and valves when the level is in normal position.

Subroutine Used to perform a function multiple times by call instruction

Command Syntax: Call P0

Exercise

ExerciseLadder Program:

Compare

Command Syntax: CMP

Used to compare data (information) between two sources

First comparison value

Second comparison value

Comparison result

If K10 > D10 , Y0 = ON

If K10 = D10 , Y1 = ON

If K10 < D10 , Y2 = ON

You need to use ZRST command to reset the comparison result

When X1 is ON, CMP command is driven

and one of Y0, Y1 & Y2 is ON. When X1 is

OFF, Y0 ~ Y2 remain in previous state

Zone Compare

Command Syntax: ZCP

Used to compare data (information) between two sources

Minimum comparison

value

Max.

comparison valueComparison result

If C10 < K10 , M0 = ON

If K10 <= C10 <= K100 , M1 = ON

If C10 > K100 , M2 = ON

You need to use ZRST command to reset the comparison result

When X1 is ON, CMP command is driven

and one of Y0, Y1 & Y2 is ON. When X1 is

OFF, Y0 ~ Y2 remain in previous state

Comparison value

Exchange - XCH

Command Syntax: XCH

Used to exchange information between two data registers

When X0 is OFF--ON, content of D20 and

D40 exchange with each otherFirst Exchange data register

Second Exchange

data register

120

400

Before

Execution

D20

D40

After

Execution

120

400

Exchange - DXCH

Command Syntax: DXCH

Used to exchange double information between two data registers

When X0 is OFF--ON, content of D20 and

D40 exchange with each otherFirst Exchange data register

Second Exchange

data register

9

20

Before

Execution

D20

D21

After

Execution

8D40

4D41

8

4

9

20

Interrupts

Command Syntax: EI

Used to compare data register zone

Interrupt pointers I numbers for SS Models

External Interrupts:

I001 = X0

I101 = X1

I201 = X2

I301 = X3

Fire Alarm in the Office (Interruption Application)

Control Purpose:

Starting the alarm and sprayer when the temperature alarm

detects high temperature.

Stopping the alarm and sprayer when the alarm reset button

is pressed.

Exercise

Exercise

Exercise• In the program, the interruption pointers I001, I101 correspond to the external

input points X0, X1. When X0, X1 is ON, the subroutines corresponding to

I001, I101 will be executed.

• If the temperature in the office is normal, X0 = OFF. The temperature alarm will

not perform any action. No interruption signal is generated, and no

interruption subroutine will be executed in this case.

• If the temperature in the office is too high, X0 = ON, the temperature alarm

will be enabled. The PLC will stop the main program to execute the

interruption subroutine I001. In this case, sprayer valve Y0 and alarm Y1 will be

enabled. After the execution of I001, the program will return to the main

program and resume execution from the interruption point.

• Press the alarm reset button if the alarm situation is cleared. X1 = ON, the PLC

will stop the main program to execute the interruption subroutine I101. In this

case, sprayer Y0 and alarm Y1 will be shut down. After the execution of I101,

the program will return to the main program and resume execution from the

interruption point.

High Speed Counter Set

Command Syntax: DHSCS

Used to set the device by reading high speed input pulses typically from Encoder signal

Compare Value

High Speed Counter

NumberCompare result

When PLC RUNS, if M0 is ON, DHSCS command

starts to operate. Y0 will be ON immediately

when C235 present value stepped from 99 to 100

or 101 to 100 and be ON constantly

When C235 present value stepped from 999 to 1000, C235 will be active and Y1 will be SET.

In SS models, this instruction cannot be used more than 4 times.

Total counting frequency is 20 KHz.

High Speed Counter Set

Command Syntax: DHSCS

Used to read high speed input pulses typically from Encoder signal

U: Increasing Input

D: Decreasing Input

Memory Bit: M1235,

M1236…



Counting method is defined by D1022

Input

Type1- Phase 1 Input 1- Phase 2 Inputs 2- phase inputs

C235 C236 C237 C238 C241 C242 C244 C246 C247 C249 C251 C252 C254

X0 U/D U/D U/D U U U A A A

X1 U/D R R D D D B B B

X2 U/D U/D R R R R

X3 U/D R S S S

A: A phase Input

B: B phase Input

S: Start Input

R: Reset Input

Device No. Function

D1022 Use counting method of counter to

set double frequency

D1022= K1 Normal frequency mode

D1022= K2 Double frequency mode

D1022= K4 4 times frequency mode

High Speed Counter Reset

Command Syntax: DHSCR

Compare Value

High Speed Counter

NumberCompare result

When PLC RUNS, if M0 is ON, DHSCR command

starts to operate. Y0 will be OFF immediately

when C235 present value stepped from 99 to 100

or 101 to 100 and be ON constantly

When C235 present value stepped from 999 to 1000, C235 will be active and Y1 will be SET.



Used to reset the device by reading high speed input pulses typically from Encoder signal

Thanks

nfi

www.nfiautomation.org

Delta DVP 14SS PLC Advanced Commands

Engineering

Transcript of Delta DVP 14SS PLC Advanced Commands