Configure Modbus TCP or Modbus RTU - SMART System

Before Modbus clients on a SCADA network or other control system can poll the SMART's Modbus registers, and before a OPC Unified Architecture (OPC UA) client can interact with the SMART's OPC UA server, you must enable Modbus functionality in the SMART Control Panel.

1. Connect to the SMART Control Panel and go to SCADA.
2. Select a Modbus Port.
   • Select TCP if you will connect the SMART to a control system via Ethernet or Wi-Fi.

     This option is required for OPC UA functionality.

   • Select ttyS0 or ttyS1 if you will connect the SMART to a control system via a serial port.

     ttyS0 corresponds to the serial port nearest to the SMART Controller's power supply input.

3. If you are using a serial port, set the serial communication options to match your control system requirements:

   Parameter	Possible Values	Default Value
   Baud Rate	50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800, 9600, 19200, 38400, 57600, 115200, 230400	9600
   Data Bits	5-8	8
   Server ID	1-247	1
   Parity	None, Even, Odd	None
   Stop Bits	1, 2	1

4. Select Apply Changes.