I want to establish communication via RF between the PLCs. One of these PLCs will take the data from the other 3 PLCs. I have GE-Fanuc 90-30 and CPU 350. How can this system be established and what should I use?

Does "GE-Fanuc 90-30 with CPU 350" have Modbus serial communication? Does it need to be Modbus master/slave module at the racks?

Thanks.

 

Hi
First aff all you need one Modbus-Master card like Horner's RTM705 and then 3 GE Fanuc CMM311 cards acting as Modbus-Slaves (RTU). CPU350 doesn't have itself Modbus capabilities.

Another possibility is to use the SNP protocol (already built in the "Power Supply serial port"). In this case you will only need one CMM311 card acting as SNP master.

I didn't mention the RF modems that is another big stuff .. left to you.