I need to implement a comunication between a s7-300 and a MESR9xx (Industrial MODBUS Ethernet to Serial Gateway), i try to comunicate s7-300 to modbus with a CP 343-1, but i need another CP 343-1 to comunicate the MESR9xx (in the other side of the line) with a IM 153-1 (ET200S distributed i/o)??
and what software aditional i need to implement it??
and what software aditional i need to implement it??