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short RTU_writeCoil(u8 comCh, u8 slaveAdr, u16 targetAdr, u8 value)

comCh: The RS-232 channel to use
slaveAdr: The Modbus slave address of the device to read from
targetAdr: The address of the data to read
value: Bit value (0 or 1) to write
returns the status of this function call (-1=Success, 0=Timeout, 1=Data Error)

Writes a bit value value to slave device slaveAdr, at address targetAdr, on RS-232 channel comCh. Returns a number indicating whether or not the function call was successful.

res = RTU_writeCoil(0,1,0x0000,1);    //Write a 1 to slave device 1,
                                      //address 0x0000


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moacon/rtu_writecoil/index.txt · Last modified: 2016/04/14 11:07 (external edit)