Late

Hi,

Please see the examples that are delivered with the software, I don't know which Registers you want to Read and/or Write. So first off all you have to decide what you want to do...

When you know that then you must program the master for write Registers so that the Send is sending the header of the FC-code + the amount of Registers (bytes !!). If you want to Read Registers then there must send a FC-code with the "question" and you have to program a Receive where you would receive the asked data.

 I want to establish communication between 3WL breaker with COM16 module as Modbus slave & S7-1500 CPU 1511-1pn with 1SI MODBUS MASTER 6ES7 138-4DF11-0AB0.
 i need the status address and to start and stop the ACB through modbus COM16.

Thanks

karthick

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Split from Communication between S7-300-CP-341(Modbus-RTU Master) & 3WL breaker-Slave(COM16) .