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This guide is for installers configuring a Sungrow Logger 1000 (EU) so Octave’s EMS can perform solar curtailment (and other active power services) via Modbus TCP.

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Prerequisites

• SmartLogger 1000 is powered on and connected to the network.
• Your laptop/PC is on the same network as the SmartLogger.
• Web browser (Chrome / Edge / Firefox).
• Installer / O&M credentials.
• Network access to Modbus TCP port 502.

Configure SmartLogger for remote active power control

1. Open a browser and go to the SmartLogger WebUI:

   http://<SmartLogger-IP>
   

2. Log in with an installer / administrator account.

3. In the left menu, navigate to Power control → Active power.

4. Under Active power control mode, set:

   Remote power control
   

1. Configure the following parameters and Save:

   Parameter	Value
   Control strategy	Open-loop control
   Query recovery time	1 s
   Frame delay	18 ms

Verify Modbus TCP connectivity (port 502)

• Sungrow SmartLogger uses Modbus TCP on port 502 by default.
• Ensure:
  • Port 502 is open on the network path between Octave / site network and the SmartLogger.
  • No firewall blocks inbound Modbus TCP requests.

Find the Device Communication ID (required)

1. In the left menu, open Device maintenance → Device list.