Connecting 218If Modules; 218If Communications Protocols - YASKAWA MP920 User Manual

7 218IF Module

7.6.1 218IF Communications Protocols

7.6

Connecting 218IF Modules

7.6.1
This section explains the internal operations with the 218IF communications protocol and pro-
vides some programming examples.

218IF Communications Protocols

Overview of the Communications Protocols
With the 218IF Module, the four protocols shown in the following table are implemented in
the application layer of the TCP/IP protocol.
Protocol
Extended MEMO-
BUS Protocol
Standard MEMO-
BUS Protocol
MELSEC-A Protocol
No protocol
All messages between MP900-Series CPU Modules and 218IF Modules are transferred
using the Extended MEMOBUS protocol.
Extended MEMOBUS
(MEMOBUS or
general-purpose)
218IF
Module
stack
The MEMOBUS mode and general-purpose message mode are available.
Yaskawa standard MEMOBUS protocol.
(Slave function only)
A subset of Mitsubishi Electric's general-purpose sequencer protocol.
Used for general-purpose message communications.
CPU Module
MSG-SND/MSG-RCV
Extended MEMOBUS protocol
(MEMOBUS or general-purpose)
Standard MEMOBUS
SOCKET
TCP
IP, ARP, ICMP
CSMA/CD
Application Protocols
7-28
Remarks
MELSEC-A No protocol
UDP