Mitsubishi Electric MELSEC iQ-R Series User Manual page 291

■Tag communications
The available functions include the message communications server function by which the CC-Link IE TSN Plus module
processes a request for the service, and the tag communications server function for processing a Read/Write request for data
for the tag set to the CC-Link IE TSN Plus module.
In tag communications, the request-sending side is called "Originator" and the request-receiving side is called "Target".
To use tag communications, a tag must be registered in "EtherNet/IP Configuration".
When registering a tag in the CC-Link IE TSN Plus module, existing tag names cannot be used.
*1 Tag names are not case-sensitive.
*2 Tag names used for Class1 tag communications are treated separately. Therefore, it is possible to use the same name as a tag used in
Class1 tag communications. However, in such a case, it is not possible to read/write message communications for that tag.
A command request is received for the target tag from the originator, the following operations are performed.
Type
Target (server) Read
Write
Description
Receive a Read request from the external device and send data in the 'Class3/UCMM data area (tag
communications)' (Un\G8278016 to Un\G8462847) associated with the specified tag to the client.
Receive a Write request from the external device and write data to the 'Class3/UCMM data area (tag
communications)' (Un\G8278016 to Un\G8462847) associated with the specified tag.
*1*2
12.4 Message Communication Function (Server)
12
12 FUNCTIONS
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