Format For The Write Single Register Command; Request Frame Format; Response Frame Format - Huawei UPS2000 Development Manual

UPS2000-(6 kVA-20 kVA)
Modbus Protocol Development Guide

1.5.5.2 Format for the Write Single Register Command

1.5.5.2.1 Request Frame Format

Byte
Field
Descri
ption

1.5.5.2.2 Response Frame Format

Byte
Field
Descri
ption
Issue 02 (2016-03-10)
0 1
ADDR CMD
Control Comma
ler nd type
address
For example, the request frame is 11 06 2B 15 00 01 52 BA.
11 is the slave device address. 06 is the write single register command. 2B15 is the register address.
0001 is the setting value. 52BA is the CRC checking value.
0 1
ADDR CMD
Control Comma
ler nd type
address
The format of the request and response frames is the same for the write single device command.
For example, the response frame is 11 06 2B 15 00 01 52 BA.
11 is the slave device address. 06 is the write single register command. 2B15 is the register address.
0001 is the setting value. 52BA is the CRC checking value.
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2 3 4
MSB LSB MSB
Register address Data
2 3 4
MSB LSB MSB
Register address Data
1 Communication Protocol
5 6 7
LSB LSB MSB
CRC checking
5 6 7
LSB LSB MSB
CRC checking
17