Modbus TCP

All gateways equipped with ethernet port support Modbus TCP in master mode.

Features

• Supports communication with multiple Modbus TCP slave devices.
• Enables remote monitoring and control of devices over an IP network.
• Compatible with all features supported for Modbus RTU.

Configuration

1. Ensure the gateway is connected to the local network via Ethernet.
2. Assign a static IP address or configure DHCP for the gateway.
3. Use the rayleighconnect™ cloud platform to configure Modbus TCP settings:
   • Select the device model from the dropdown list of supported models.
   • Provide the IP address of the Modbus TCP slave device.
   • The default Modbus TCP port is 502.
   • The platform automatically configures the registers based on the selected model.

For a list of supported models, see Meters and Sensors.

Use Cases

• Monitoring industrial equipment such as PLCs, sensors, and actuators.
• Collecting data from energy meters and other Modbus-enabled devices.
• Integrating Modbus TCP devices into centralized energy management systems.

Limitations

• The number of slave devices is shared between Modbus RTU and Modbus TCP.
• Network latency may affect real-time data acquisition.

For more information on configuring Ethernet settings, see Ethernet.