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Multiple write functions Modbus single request problem


  • Hello everybody,

    I have configured Modbus IP type data source with "Use multiple write commands only" check active, I can use the function FC15 Write Multiple Coils and FC16 Write Multiple Register, but I cannot write several outputs/ registers at the same time in the same request. According to the Modbus protocol it should be possible to do it.

    I use a meta data and change at the same time the outputs/registers but then the communication driver separates FC15 / FC16 in several requests.

    Is there a way using these types of functions in which several outputs or registers are written in a single Modbus request in mango? I am doing something wrong?

    Thanks in advance!