SM_Close SM_ConfigureSerialConnection SM_ConfigureSerialTimeouts SM_CustomMessage SM_GetAnalogConfig SM_GetAnalogInputConfig SM_GetAnalogInputRanges SM_GetAnalogOutputRanges SM_GetDeviceConfig SM_GetFirmwareVersion SM_GetLastError SM_GetLastFTDIError SM_GetLastWin32Error SM_GetPIODirection SM_GetPIOPresets SM_GlobalCommsReset SM_NotifyInputState SM_NotifyOnInputChange SM_Open SM_OpenSecure SM_ReadAnalogInputs SM_ReadAnalogOutputs SM_ReadDigitalInputs SM_ReadDigitalOutputs SM_ReadPIO SM_SelectDevice SM_SetAnalogConfig SM_SetAnalogInputConfig SM_SetAnalogInputRanges SM_SetCommunications SM_SetPIODirection SM_SetPIOPresets SM_SetPolarity SM_SetSoftwareAddress SM_Version SM_WriteAnalogOutputs SM_WriteDigitalOutputs SM_WritePIO

int __stdcall SM_SelectDevice ( SM_HANDLE  handle, int  slaveID  ) Targets a new Modbus device. Parameters [in] handle Valid handle returned by SM_Open(). [in] slaveID New Modbus slave ID to be used in future SeaMAX operations. Valid values are 0 - 247. Return values 0 Success. -1 Invalid SeaMAX handle. -2 Invalid slave ID. After calling SM_SelectDevice, all future SeaMAX operations will be directed at the indicated slave ID parameter. For instance, if COM3 has been opened with SM_Open() the default slave ID is 247, all reads and writes through SM_ReadDigitalInputs() and SM_WriteDigitalOutputs() will be directed at the SeaI/O module with slave ID 247. However, if there is another module chained to the first module, and it has a slave ID of 4, that module can be read from and written to by calling SelectDevice with a value of 4. Afterward, all operations will directed at the second module (slave ID 4) until the port is closed or SelectDevice is called again. Note Calling this function will terminate any outstanding notify on input change requests. References SM_NotifyInputState(). Referenced by CSeaMaxW32::Ioctl(), CSeaMaxW32::Read(), and CSeaMaxW32::Write().