See also: https://wiki.eniris.be/wiki/publicinformation/view/Integraties/Huawei%20Remote%20Output%20Control/#

• IEC104 is a universal standard protocol used to connect to a third-party management system. Because there is no security authentication mechanism, data transmitted by IEC104 is not encrypted. To reduce network security risks, the function of connecting to a third-party management system using IEC104 is disabled by default. This protocol can transmit the running data and control commands of PV plants, which may cause user data breach and control permission theft. Therefore, exercise caution when using this protocol. Users are liable for any loss caused by the use of this protocol to connect to a third-party management system (non-secure protocol). Users are advised to take measures at the PV plant level to reduce security risks, or use Huawei management system to mitigate the risks.
• The SmartLogger can connect to a maximum of five third-party NMSs.
• If the SmartLogger connects to a third-party NMS over the IEC104 protocol, IEC104 parameters must be correctly set to enable the third-party NMS to monitor the running status of devices connected to the SmartLogger.

Because of permission restriction, log in as Advanced User. Choose Settings > IEC104 to access the target page.