# Huawei Smartlogger 3000

> Enable Modbus TCP on the Huawei SmartLogger 3000 so the Voltmasters EMS can read it, including the limited and unlimited link settings.

Source: https://voltmasters.io/en/docs/device-integrations/pv-inverters/huawei/huawei-smartlogger-3000/

### Enable Modbus TCP

To activate Modbus, log in to the web interface as **Installer** and navigate to:

**Settings → Comm. Param → Modbus TCP**

Then set **Link Setting** to **Enable (Limited)** or **Enable (Unlimited)**.

-   **Enable (Limited):** you must add the specific IP addresses that are allowed to access the system via Modbus. Only these IPs will be permitted.
-   **Enable (Unlimited):** any IP address can access the system via Modbus.

![Limited setting view Huawei Smartlogger 3000](https://voltmasters.io/assets/docs/unknown-8.webp)

*Limited setting view for the Huawei Smartlogger 3000*

![Unlimitted view for the Huawei Smartlogger 3000](https://voltmasters.io/assets/docs/unknown-9.webp)

*Unlimited setting view for the Huawei Smartlogger 3000*