GE Fanuc 90-30 connection

Hi Everybody

We have one station where 1 No. GE FANUC 90-30 linked to the SCADA (remote) by a leased line at each end with a leased line modem. At the SCADA station also, we have a GE FANUC 90-30.The SCADA is alraedy connected

I want to know how can we access the station PLC to view and diagnostic. The PLC have CMM communication card configured as RTU only.

Thanks

You can view data using RTU, and only the diagnostic information that is located in data registers within the 90-30.
Set the remote 90-30 to a known RTU Node number and match the serial parameters at each end then use standard Modbus RTU commands to Read & Write data using the remote's documentation for the address of the information you need.