Yaskawa MP920 Communications Module - Manual (Page 175)

7.6 Connecting 218IF Modules
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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