eGauge Energy Meter

Installation

1. 1Connect your ModbusCloud gateway (MCG or MLP series) to the same local network as the eGauge meter, ensuring both devices can communicate over Modbus TCP on port 502.
2. 2Log in to the eGauge web interface and open the Modbus Map page to verify the register addresses assigned to each measurement point.
3. 3Import the eGauge Energy Meter template into your ModbusCloud project and set the IP address of the eGauge device in the gateway configuration.
4. 4Cross-check the register addresses in the template against the Modbus Map and adjust any addresses that differ due to the order of register creation on the eGauge.
5. 5If using an eGauge Pro (MG4030 / EM4030) with more measurement channels, add extra Modbus inputs in the template to cover the additional registers.
6. 6Verify that live readings on the ModbusCloud dashboard match the values shown in the eGauge web interface before finalizing the installation.

Things to watch for

01

Why do my register addresses not match the template defaults?

The eGauge assigns Modbus register addresses dynamically based on the order measurement points are created in its web interface. Always consult the Modbus Map in the eGauge web interface and update the template registers accordingly.

02

Why are energy values incorrect or extremely large?

Energy registers use int64 encoding, which spans four Modbus registers per value. Make sure the data type in ModbusCloud is set to int64 and that the register start address is correct. A wrong data type or offset will produce nonsensical readings.

03

Do I need to modify the template for the eGauge Pro (MG4030)?

Yes. The eGauge Pro supports more measurement channels than the Core model. The base template includes 15 cumulative and 15 power registers, but you may need to add extra Modbus inputs to cover all configured channels on the Pro.

04

What TCP port does the eGauge use for Modbus?

The eGauge typically uses the standard Modbus TCP port 502. Ensure no firewall rules on the local network block traffic between the gateway and the eGauge on this port.

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