CALL PLCWRITE Statement. Emerson Electronic Motion Control T-60

PLC Interface Commands CALL PLCWRITE Statement

CALL PLCWRITE Statement

Purpose:

This command is used to write value(s) to a PLC’s register(s), memory location(s), or to force one or more output bits in a PLC. Refer to the -PL5 and -SL5 for information on how to use this command with the

Allen-Bradley PLC-5 and SLC-500 processors.

Syntax:

CALL PLCWRITE(id,cmd,start address,# of registers/bits,expression/variable/array )

Comments:

id specifies the address of the PLC to which you wish to write. This number is usually 1 when interfacing to one PLC.

cmd specifies the write operation you wish to perform. See the table below for the write operation possibilities:

•

•

•

Table 6

Write Operation Options

MOD GE9 TI5

•

•

•

TI3

•

•

•

•

•

•

•

• •

•

• start address is the starting address of the bit(s) or register(s) you are interested in writing. In the case of the Modbus, this does not include a data type specifier (%, $, !, etc.)

OM1

•

•

•

•

•

PL2

•

•

•

•

•

Cmd

7

8

5

6

3

4

1

2

9

10

11

Function

Clear Status

Write Input Bit(s)

Write Output Bit(s)

Write to a Register

N/A

N/A

N/A

Write to Analog Output(s)

Write to Discrete

Internals/Coils/Relays

Write to Holding Relays (bits)

Write to Auxilary Relays (bits)

Typical Data*

Any 5 words

16 bit words

16 bit words

1 word per register

N/A

N/A

N/A

1 word per output

16 bit words

16 bit words

16 bit words

65