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Sungrow Logger1000#

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.

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

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  1. Configure the following parameters and Save:

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

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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.

  2. In the Device List table, locate the following columns:

    • Device name / model
    • Port (COMx)
    • Device address
    • Communication address
    • Modbus forwarding address
    • Communication status

  3. The Device Communication ID is the value shown as Communication Address / Modbus Forwarding Address.

  4. Take a screenshot of the table with these fields visible, including the green communication status indicator.

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Verify inverter accepts remote power regulation#

  1. Go to Device monitoring.
  2. Select an inverter.

  3. Open Power regulation parameters.

  4. Confirm:

    • Power control parameters are enabled.
    • No local override blocks remote commands.

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Deliverable for onboarding passport#

Provide the screenshot from Device maintenance → Device list clearly showing:

  • Device Name
  • Device Model
  • COM Port
  • Communication Address / Modbus Address
  • Green communication status indicator

Notes#

  • This configuration enables Octave's EMS to send active power commands to the site via the SmartLogger.
  • If multiple inverters are connected, each inverter typically has a unique COM port and Modbus communication address.