Mitsubishi Electric MELSEC iQ-R Series User Manual page 116

I/O communication with the master node
Perform the I/O communication between the RJ71DN91 slave node and the master node without the refresh setting.
■Without data consistency
Set "Data consistency setting" of "Master/Slave Function Common Parameters" to "Disable".
[Navigation window]  [Parameter]  [Module Information]  [RJ71DN91]  [Module Parameter]  [Basic Setting]
To secure the consistency of transmit/receive data of multiple words, check the data communication by providing the area for
handshake at the end of the transmit/receive data.
Classification
Module label
Label to be defined
(0) The transmit data default value is set.
'I/O communication request' (Y11) is turned on.
(24) (30) The receive data is read from 'Slave function receive data' (U2\G2816).
(35) The transmit data is created.
(45) The transmit data is written to 'Slave function transmit data' (U2\G3072).
APPX
114
Appendix 5 Setting the Parameter with a Program
Label name
RDN91_1.bSts_IO_Communicating
RDN91_1.bSet_IO_Communication_Request
RDN91_1.uBFM_Control_Direct.uSlave_Function_Transmit_Data_D[0]
RDN91_1.uBFM_Monitor_Direct.uSlave_Function_Receive_Data_D[0]
Define global labels as shown below.
Description
I/O communicating
I/O communication request
Slave function transmit data
Slave function receive data
Device
X21
Y31
U2\G3072
U2\2816