Connect to a Modbus Device Tutorial

Connect to a Modbus Device and addresses to tags.

Tutorials → Devices | Tutorial | How-to Guide | Reference

1. Create Device Channel

1. Navigate to Devices → Protocols
2. Select Modbus
3. Click on New channel:
   • Channel Name: ModbusChannel
   • Protocol: Modbus Master Protocol
   • Interface: TCP/IP

2. Add Device Node

1. Go to Devices → Nodes
2. Create node:
   • Name: PLC1
   • Channel: ModbusChannel
   • Station: IP Address (use 127.0.0.1 for simulator)
   • Port 502
   • Device ID: 1

3. Create Device Points

1. Navigate to Devices → Points
2. Add points:

Digital Input:

• Tag Name: TankFarm/Tank1/Level
• Node: PLC1
• Address: 40001 
• Data Type: Native
• AccessType: ReadWrite

Analog Input:

• Name: TankFarm/Tank2/Level
• Node: PLC1
• Address: 40002 
• Data Type: Native
• AccessType: ReadWrite

4. Starting Modbus Device Simulator

1. Devices → Channels
2. Select ModbusChannel
3. Run Modbus Simulator

5. Test Communication

1. Start Runtime
2. Open Devices → Monitor
3. Check status (if the ActivityCounter is increasing and LastErrorCode stays fixed, it means everything is running properly)