Message Communication Function (Server) - Mitsubishi Electric MELSEC iQ-R Series User Manual

12.4

Message Communication Function (Server)

Function overview
This function executes the service specified by a command request sent by the client and returns a response.
Command acceptance
Service execution
Creating response data
(1) Command
(2) Response data
The available functions include the general message communications server function for accepting a command request sent
from a client and the tag communications server function for accepting a Read/Write request for data for the tag set to the
server.
To use the message communication function (server), set Not 0 (start request) for 'EtherNet/IP communication
start request' (Un\G7340096) so that EtherNet/IP communications can be used.
The message communication function (server) has the following communication methods.
Communication method
UCMM message
communications
Class3 message
communications
UCMM tag communications
Class3 tag communications
■Message communications
UCMM (Unconnected) and Class3 (Connected) message communications are supported. Messages are processed
according to the request from the client.
The services the CC-Link IE TSN Plus module can process differs depending on the class ID specified by a command request
for the message communication support command. For details on the services available for each class ID, refer to the
following.
Page 349 MESSAGE COMMUNICATION SUPPORT COMMANDS
When the CC-Link IE TSN Plus module operates as a server, it automatically processes the command when receiving a
command request from the external device and returns a command response to the external device. No special setting and
operation are required.
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12.4 Message Communication Function (Server)
Server
Connection Description
No Without establishing a connection between the CC-Link IE TSN Plus module and the external device
(client), the command request accepted from the client is processed and response data is sent.
Yes By establishing a connection between the CC-Link IE TSN Plus module and the external device (client),
the command request accepted from the client is processed and response data is sent.
No Without establishing a connection between the CC-Link IE TSN Plus module and the external device
(client), data is read and written for the set tag.
Yes By establishing a connection between the CC-Link IE TSN Plus module and the external device (client),
data is read and written for the set tag.
Client
(1)
(2)
EtherNet/IP