Omron Protocol - YASKAWA MP920 User Manual

3 Communications Protocols

3.2.4 OMRON Protocol

3.2.4

OMRON Protocol

The OMRON protocol is used for communications between SYSMAC Programmable Logic
Controllers (PLCs) manufactured by OMRON. There is no need to be aware of the commu-
nications protocol.
Communications Using the OMRON Protocol
The OMRON protocol is used for communications between a Controller and an OMRON
PLC.
That is to say, the Master (Controller) transmits an OMRON format command to the Slave
(SYSMAC PLC), and receives a response message from the Slave.
When communicating with a SYSMAC PLC, the protocol is automatically converted inside
the 217IF Module. Therefore, the MSG-SND and MSG-RCV system functions can be used
in the same way as when the Extended MEMOBUS protocol is used by a user program.
MP900-Series Machine Controller
(Master)
CPU
MSG-RCV
MSG-SND
217IF
Fig. 3.4 OMRON Format Message Flow
Between a Controller and OMRON PLC
SYSMAC PLC (Slave)
OMRON format
3-10
RS-232C