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short RTU_writeCoils(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 an array of bits, 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. Although function code 15 is for writing several bits, this function can write at most 8 bits.

res = RTU_writeCoils(0,1,0x0000,0x12);   //Write bit array 0x12 to slave
                                         //device 1, address 0x0000


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