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YASKAWA MP920 - Connecting 218 IF Modules; 218 IF Communications Protocols

YASKAWA MP920
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7 218IF Module
7.6.1 218IF Communications Protocols
7-28
7.6 Connecting 218IF Modules
This section explains the internal operations with the 218IF communications protocol and pro-
vides some programming examples.
7.6.1 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.
All messages between MP900-Series CPU Modules and 218IF Modules are transferred
using the Extended MEMOBUS protocol.
Protocol Remarks
Extended MEMO-
BUS Protocol
The MEMOBUS mode and general-purpose message mode are available.
Standard MEMO-
BUS Protocol
Yaskawa standard MEMOBUS protocol.
(Slave function only)
MELSEC-A Protocol A subset of Mitsubishi Electric’s general-purpose sequencer protocol.
No protocol Used for general-purpose message communications.
CPU Module
MSG-SND/MSG-RCV
Extended MEMOBUS protocol
(MEMOBUS or general-purpose)
Standard MEMOBUS
Extended MEMOBUS
(MEMOBUS or
general-purpose)
MELSEC-A No protocol
TCP
SOCKET
UDP
IP, ARP, ICMP
CSMA/CD
218IF
Module
stack
Application Protocols

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