Connections With Melsec; System Configuration; Message Flow - YASKAWA MP920 User Manual

7 218IF Module

7.8.1 System Configuration

7.8

Connections with MELSEC

7.8.1
7.8.2
INFO
This section gives an example of a system configuration in which an MP900-Series 218IFA
Module and MELSEC are connected by Ethernet.

System Configuration

218IF Master communications
218IFA Module
Note: Make the 218IFA Module the Master, and make the MELSEC Con-
troller the Slave.

Message Flow

PS-01 MP920 218IFA
CPU-01
Protocol
conversion
Standard
MEMOBUS
command
Messages
Extended MEMOBUS messages are exchanged between the MP920 and the 218IFA, and
MELSEC messages are exchanged between the 218IFA and MELSEC.
For MELSEC communications, check the operation when the A2U CPU and AJ71E71 are used in
combination.
MELSEC
A2U CPU
AJ71E71
MELSEC
messages
Local
station
7-38
Ethernet
Ethernet
MELSEC
Remote
station