Rate and give feedback:
Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document.
Note: Even the most advanced machine translation cannot match the quality of professional translators.
Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Connecting the SmartLogger to an EMI That Supports Standard Modbus-RTU
Context
The SmartLogger can connect to an EMI that supports the standard Modbus-RTU protocol. One SmartLogger can connect to and manage only one EMI.
Devices from different vendors may support different protocols. To normally obtain information from the connected EMI, correctly configure the protocol on the SmartLogger WebUI based on the document delivered by the vendor.
For the definition of the RS485 communications cable for the EMI, see the instructions delivered with the EMI.
There are three RS485 ports in the SmartLogger. For the port descriptions, see Context in Connecting the SmartLogger to the SUN2000.
Figure 4-22 shows how to connect the SmartLogger to the EMI.
Procedure
- Connect one end of the cable delivered with the EMI to the RS485 port of the EMI.
- Connect the other end of the cable to
a Surge port of the RS485 signal SPD. For details, see 2–4 in Procedure in Connecting the SmartLogger to the SUN2000.
Verify that the RS485+ port on the EMI is connected to Surge port 1 or 7 on the RS485 signal SPD, and that the RS485- port on the EMI is connected to Surge port 5 or 11 on the RS485 signal SPD.
- The EMI cannot be detected automatically. You need to add this device manually on the LCD or WebUI. For details about this operation, see Managing Devices or Connecting Devices.
- After the EMI is connected, log in to the embedded WebUI and set relevant parameters for the EMI. For details, see Setting EMI Parameters. Select the specific model of EMI.
- When the SmartLogger is connected to an EMI and multiple inverters at the same time, connect the EMI to the end of the daisy chain. For details, see Connecting Multiple Inverters to the SmartLogger.
