I need to add a custom modbus function in Qt. It doesn't have any parameters and as a result I expect to get a constant data-length packet. ... <看更多>

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Modbus is intended as a request/reply protocol and delivers services specified by function codes. The function code in the request tells the addressed slave ... ... <看更多>

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The Schneider with SoMachine Basic or Unity series of PLCs use Modbus function. code 90 (0x5a) to perform administrative commands without authentication. ... <看更多>