Connect Huawei SmartLogger to SUN2000 and Reduxi (LAN/Mobile) via TCP/IP – English

1. Introduction

Reduxi system enables communication and control of the Huawei SUN2000 inverter. Communication is enabled through Modbus TCP/IP protocol. Reduxi Controller and SmartLogger must be connected to the same local area network (LAN) so Controller can access the SmartLogger and consequently to Inverters, which are linked to SmartLogger with RS485 serial connection.

Symbolic image of communication between Reduxi Controller and Huawei SUN2000 inverter.

2. Reduxi Controller Network settings

Information on how to connect Reduxi Controller to the network (LAN or WLAN) is available on the URL: Reduxi Controller.

Once connected to the network, it is recommended that static IP is set so the Redux Controller. When the static IP is set, the exact information about the subnet in which Reduxi Controller is available.

3. Huawei SmartLogger Access/Network/Configuration settings via cable (LAN/WAN)

Once the Redxui Controller side of the network setting is complete, the same process needs to be done for the SmartLogger.

To access the software SmartLogge interface, please check the instructions of SmartLogger user manual or simply if you know the local IP address of SmartLogger use this IP address, and open it in your browser.

When you will be logged in the SmartLogger:

Set the IP and Mask of the SmartLogger, an example is given for the Wired connection. Under Ethernet2 set the IP and Subnet mask, image below:

image (3).png

Modbus TCP/IP settings, where Link settings must be set to Enable(unlimited) like on the image below:

Modbus TCP/IP settings, where you set:
- Link settings. Enable,
- Address mode: Logical address (must be set to logical!)
- Logger address: set the SmartLogger logic address,
- Fast scheduling: Disable.

Additional information (Important!!!) --> Logger address should not be the same as the logical address of one device connected to the logger!.

Image below:

image (2).png

Maintenance settings have the role of overviewing which devices are connected and showing the status and parameters belonging to each device, the image below:

image (1).png

3.1 Huawei SmartLogger Access/Network/Configuration settings via mobile phone (SUN2000 app)

Before starting, ensure the following:

The SmartLogger S3000 is powered on.
The Wi‑Fi access point is active.

If the Wi‑Fi network is not visible:

Press the RST button for 1–3 seconds to enable the access point.

On your mobile device:

Open Wi‑Fi settings.
Connect to the SmartLogger access point:
- Network name: Logger_SN
  (SN = device serial number)
- Password:
  - Printed on the device label, or
  - Default: Changeme

Open one of the supported applications:

SUN2000 App (available in Huawei AppGallery), or
FusionSolar App

Then choose:

Device Commissioning (FusionSolar), or
Direct Login (SUN2000)

Enter the default login credentials:

Username: installer
Password: 00000a (default)

4. Testing communication between the Reduxi Controller and SmartLogger

A few criteria conditions need to be met for successful communication between the Reduxi Controller and SmartLogger.

Criteria:

Reduxi Controller and SmartLogger need to be the same subnet, for example, IP of Reduxi Controller is: 192.168.1.100, and SmartLogger IP is: 192.168.1.101
The Controller and SmartLogge don't need to be in the same subnet, this case is much more complex and is usually not in use. Here firewalls between the Controller subnet and SmartLogger subnet need to be open at least for the set IP of both devices. Also, firewall exception rules for ports need to be enabled properly. This option is not recommended.
Port 502 on the SmartLogger side needs to be enabled for Modbus TCP/IP communication, which is done with Modbus TCP/IP enabled in the SmartLogger application.
In case there is another firewall between Controller and SmartLogger port 502 needs to open on the firewall as well.

The connection is checked with Test communication when you add the device (see 5.4).

5. Adding a new device (Huawei SmartLogger 3000/5000)

With a Huawei SmartLogger 3000 or 5000, you add the SmartLogger once. You do not need to add individual Huawei SUN2000 inverters. All data is obtained from the SmartLogger itself, and PV is controlled with the combined PV power.