Mitsubishi Electric MELSEC iQ-R Series User Manual page 288

The following describes the operations when the trigger specification is changed during the time between the
bit of 'Class3/UCMM communication execution request acceptance' (Un\G7749648 to Un\G7749663) turning
off and on and the bit of 'Class3/UCMM communication execution request' (Un\G7749632 to Un\G7749647)
turning on and off. (Including during the time of periodic transmission by Cyclic)
• When the trigger specification is changed from Application Trigger to Cyclic, periodic transmission is not
performed. To enable periodic transmission, turn on and off the bit of 'Class3/UCMM communication
execution request' (Un\G7749632 to Un\G7749647) once, check that the bit of 'Class3/UCMM
communication execution request acceptance' (Un\G7749648 to Un\G7749663) and the bit of 'Class3/
UCMM communication execution completion' (Un\G7749664 to Un\G7749679) are turned off, and turn off
and on the bit of 'Class3/UCMM communication execution request' (Un\G7749632 to Un\G7749647).
• When the trigger specification is changed from Cyclic to Application Trigger, periodical transmission is
performed the RPI time after transmission immediately before the change of the trigger specification, and
then periodic transmission stops. To execute periodic transmission again, refer to the case where the trigger
specification is changed from Application Trigger to Cyclic.
Sending/receiving data for message communications using module function blocks
Execute data sending/receiving for message communications using module function blocks.
Determine the module function blocks to be used based on the communication type for executing message communications,
communications method, and service to be used (when the communication method is tag communications).
For details on module function blocks, refer to the following.
MELSEC iQ-R EtherNet/IP Function Block Reference
Communication type Communication
UCMM
Class3
■Request number
Determine the request number as follows according to the communication type to be executed.
Communication type Method
Class3
UCMM
12 FUNCTIONS
286
12.3 Message Communication Function (Client)
Service
method

Message
communications
Tag communications Read
Write

Message
communications
Tag communications Read
Write
After the required parameters such as the tag name, class, instance, and attribute ID for Class3 communications to be used are set
in "EtherNet/IP Configuration", the number of the connection number for which these Class3 communications parameters were set
becomes a request number.
The same number as a connection number for which the Class3 communications parameters are not set in "EtherNet/IP
Configuration" can be used as a request number.
However, a request number used by another module function block or the number of an area used in 'Class3/UCMM
communication area' (Un\G7751680 to Un\G8275967) cannot be used. Be careful about duplication.
(Identical numbers can be used as long as they are not requested at the same time. In that case, however, mutual exclusion is
required. Managing request numbers based on different numbers is therefore recommended.)
Module FB
M+RJ71GN11_SE_EIP_UCMMOriginator_MessageSend
M+RJ71GN11_SE_EIP_UCMMOriginator_ReadTagData
M+RJ71GN11_SE_EIP_UCMMOriginator_WriteTagData
M+RJ71GN11_SE_EIP_Class3Originator_MessageSend
M+RJ71GN11_SE_EIP_Class3Originator_ReadTagData
M+RJ71GN11_SE_EIP_Class3Originator_WriteTagData