Huawei UPS2000 Development Manual page 42

UPS2000-(6 kVA-20 kVA)
Modbus Protocol Development Guide
B. Query the status of UPSs 1–4 on a regular basis.
Take querying the status of UPS 1 as an example. The signal collecting register address of the
UPS 1 phase A input voltage is 11000, which is 0x2AF8 in hexadecimal format.
Query frame: 11 03 2A F8 00 01 0F 73
Response frame: 11 03 02 08 9D BF EE
When there is response data, it means that UPS 1 exists. If there is no response data, it means
that No. 1 does not connect to a UPS, or the connected UPS fails in communication.
Continue to query the registers of No. 2 (0x5208), No. 3 (0x7918), and No. 4 (0xA028) to
obtain the status of UPSs 2–4.
Next, according to the UPS number, you can query and set the corresponding semaphores.
C. Query the phase A input voltage of UPS 1:
Query frame: 11 03 2A F8 00 01 0F 73
Response frame: 11 03 02 08 9D BF EE
According to section
input voltage is 11000, which is 0x2AF8 in hexadecimal format. The response data is 0x089D,
which is 2205 in decimal format. Divided by the gain 10, the value is 220.5, which indicates
the phase A input voltage of UPS 1 is 220.5 V.
D. Control UPS 2 to switch from manual charging to equalized charging:
Set frame: 11 06 55 FC 00 01 9B 66
Response frame: 11 06 55 FC 00 01 9B 66
E. Query UPS 3 battery undervoltage alarm state:
Query frame: 11 03 A8 E4 00 01 E6 CD
Response frame: 11 03 02 00 08 78 41
The basic register address of the battery undervoltage alarm is 40164. Add the UPS 3 offset
address to get:
40164 + 3 x 1024 = 43236 = 0xA8E4
The response data is 0x0008, and the bit3 value is 1, indicating the battery undervoltage alarm
exists.
Issue 02 (2016-03-10)
2.1.2 Collection Signal
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3 Examples for the Host Communication Process
List, the register address of the UPS 1 phase A
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