Cp1h communications issue

Hi good day,

we have 4 omron cp1h and one pt connected through modbus rs485. Now we try to add some of the inputs to one plc and transfer to other plcs. And i checked there is no send, receive instruction. So pleae guide me how to transfer the bits and data from one plc to others.
Thanks in advance...

Perhaps look at this:
https://www.myomron.com/index.php?action=kb&article=1243