Class3 Message Communications (Client) - Mitsubishi Electric MELSEC iQ-R Series User Manual

Class3 message communications (client)

By establishing a connection between the CC-Link IE TSN Plus module and the external device (server), message
communications are performed periodically.
A command request set for the external device registered in "EtherNet/IP Configuration" is sent as Class3 communications
parameters for the CC-Link IE TSN Plus module. The command response from the external device is stored in the response
area of 'Class3/UCMM communication area' (Un\G7751680 to Un\G8275967).
Message communications request data preparation
The following describes the setting procedure necessary for sending message communications command requests.
1.
In "EtherNet/IP Configuration", set Class3 communications parameters. ( Page 117 "EtherNet/IP Configuration"
window)
2.
If necessary, set the following in the request area of 'Class3/UCMM communication area' (Un\G7751680 to
Un\G8275967).
Match the connection number in the Class3/UCMM communication area with the connection number in the Class3
communications parameters set in "EtherNet/IP Configuration".
Name Address (when Connection
No. is 1)
Request data Un\G7751846 to Un\G7752552
Data sending/receiving
For details on sending and receiving data for Class3 message communications, refer to the following.
Page 283 Sending/receiving data for the message communication function (client)
Description
Request data to be sent to the external device. (Specified in a little-endian format byte string)
A valid area is judged based on the data size set in the Class3 communications parameters.
Since the data size is set in byte units, an area with the data size  2 (rounded up) is valid.
This setting is not required when 0 is set for Data Size.
12 FUNCTIONS
12.3 Message Communication Function (Client)
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