IPC@CHIP Modbus library – API Documentation

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int mbRTU_mst_wr_single_coil ( MbHandle  handle,
u8  slaveAddr,
u16  startAddress,
u16  coil,
u8 exception,
u32  timeoutMs 
)

Send a "write single coil" request 5 and receive reply from the slave.

Parameters:
[in] handle : Handle returned by mbRTU_mst_init()
[in] slaveAddr : Slave address
[in] startAddress : Address of the first register
[in] coil : Bit value to write (coil==0x0000: value OFF, 0xFF00 == ON)
[out] exception : Exception code (see ModbusExceptionCodes).
[in] timeoutMs : Wait max. timeout in [ms] for a reply from the slave
Returns:

0 : Execution successful, check *exception for possible exception code.
-1 : Communication timeout receive
-2 : Received garbage (CRC error)
-3 : Unable to send request
-8 : Illegal parameter





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