I need to connect by Siemens S7-300 PLC (CPU315-2 DP) to fetch data from GE Fanuc VersaMax Micro PLC (IC200UDD110) through Modbus RTU. But i have no idea how to do it.
Below are links from another groups that hope can be your starting point :
Please learn them first and back with more specific question if any,
hope these helps
A starting point is to decide if the GE Fanuc VersaMax Micro PLC is acting as Modbus RTU master or Slave. There are Siemens solutions for Modbus RTU, but I would suggest using a gateway as it is more cost effective.
As the S7-300 is normally a Profibus master, you will need:
If the GE Fanuc VersaMax Micro PLC is acting as Modbus RTU Slave.
And you will need:
If the GE Fanuc VersaMax Micro PLC is acting as Modbus RTU master.
My 2 cents