DCS CPU-366 Instrukcja Użytkownika Pobierz pdf (Strona 82)

GFK-2334A A-1

COMMREQ Operation

The Communication Request function (COMMREQ) allows the program to communicate

with a GE Fanuc intelligent module, such as a PROFIBUS master or slave.

The COMMREQ function uses a command block that contains the data to be

communicated to the device, plus information related to the execution of the COMMREQ.

The command block must be placed in the designated memory area using data move

instructions, such as MOVE or BLKMOV (Block Move).

The CPU reports the result of the COMMREQ in the status word, which is a single

location in PLC data memory. The status word address is specified in the command block.

For a list of status codes reported in the status word, see “COMMREQ Status Word” on

page A-5.

For details on the COMMREQ tasks supported by the PROFIBUS CPUs, see:

 CPU366 with PROFIBUS Master, chapter 5

 CPU367 with PROFIBUS Slave, chapter 6

This appendix provides an overview of the COMMREQ instruction. For details of the

COMMREQ ladder instruction, refer to the online help provided with the programming

software.

Appendix

1 2 ... 77 78 79 80 81 82 83 84 85 86 87 88

Brak uwag

DCS CPU-366 Instrukcja Użytkownika Strona 82