SolarLog Data Reading via Modbus TCP

Installation

1. 1Verify that the SolarLog firmware is version 2.8.1 Build 49 or higher, and update via the SolarLog website if needed.
2. 2Enable the Modbus TCP server in the SolarLog configuration menu and note the device IP address.
3. 3Connect the ModbusCloud gateway (MCG or MLP series) to the same local network as the SolarLog.
4. 4In the ModbusCloud platform, create a new Modbus TCP connection using the SolarLog IP address, port 502, and Slave ID 1.
5. 5Import the SolarLog Data Reading template from the ModbusCloud template library and assign it to the configured connection.
6. 6Confirm that register values such as AC Power and Daily Yield appear correctly on the ModbusCloud dashboard.

Things to watch for

01

No data appears after importing the template. What should I check?

Confirm that the SolarLog firmware is at least version 2.8.1 Build 49. Older firmware does not expose the Modbus TCP interface. Also verify that the gateway and the SolarLog are on the same subnet and that port 502 is not blocked by a firewall.

02

Do I need a Modbus license from SolarLog to use this template?

No. All registers used in this template are freely available without an additional Modbus license from SolarLog.

03

Which Slave ID should I use?

Use Slave ID 1. This is the default Modbus TCP slave address for SolarLog data loggers.

04

The yield values look too high or too low. What could be wrong?

Check that the register data types are set to uint16 or uint32 as specified in the template. Mismatched data types or incorrect byte order can cause scaling errors. The registers start at address 3500.

Registers (17)

17 read / 0 write

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