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

Class3 tag communications (client)

By establishing a connection, data is read/written periodically.
• Read request
Originator
Execution result, data
(1) Connection open
(2) Read request
(3) Read response
(4) Connection close
• Write request
Originator
(1) Connection open
(2) Write request
(3) Write response
(4) Connection close
Tag communications request data preparation
The following describes the setting procedure necessary for executing tag communications.
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 tag communications, refer to the following.
Page 283 Sending/receiving data for the message communication function (client)
(1)
Request
(4)
(1)
Request, data
Execution result
(4)
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.
For the data size, an area of the size (Data Size)  (Data Type type) becomes valid.
(1 (word) when Data Type is [INT], and 2 (word) when Data Type is [DINT])
When UCMM/Class3 Read Originator is set for Service, the setting is not required.
Target
(2)
(3)
Target
(2)
(3)
12.3 Message Communication Function (Client)
EtherNet/IP
EtherNet/IP
12 FUNCTIONS
281
12