Table Of Contents - Huawei UPS2000 Development Manual

Modbus protocol

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User manual (39 pages)

Table of Contents

UPS2000-(6 kVA-20 kVA)

Modbus Protocol Development Guide

About This Document .................................................................................................................... ii

1 Communication Protocol ............................................................................................................. 1

1.1 Protocol Description ..................................................................................................................................................... 1

1.2 Glossary ........................................................................................................................................................................ 1

1.3 Physical Interface .......................................................................................................................................................... 2

1.3.1 Serial Communication Electrical Standards............................................................................................................... 2

1.3.2 Data Transmission Speed ........................................................................................................................................... 2

1.3.3 Cable Connection ....................................................................................................................................................... 2

1.4 Communication Mode at the Physical Layer ................................................................................................................ 8

1.5 Command Type and Format at the Application Layer .................................................................................................. 9

1.5.1 Function Code List .................................................................................................................................................... 9

1.5.2 CRC Checking Algorithm .......................................................................................................................................... 9

1.5.3 Definition and Format for the Read Device Identifier Command ........................................................................... 10

1.5.3.1 Frame Format........................................................................................................................................................ 10

1.5.3.2 Command Definition ............................................................................................................................................ 10

1.5.3.3 Frame Format Examples ....................................................................................................................................... 13

1.5.3.4 Query Device Identification Information Command ............................................................................................ 15

1.5.3.4.1 Request Frame Format ....................................................................................................................................... 15

1.5.3.4.2 Response Frame Format .................................................................................................................................... 15

1.5.4 Definition and Format of Read Command ............................................................................................................... 16

1.5.4.1 Read Command Definition ................................................................................................................................... 16

1.5.4.2 Read Command Format ........................................................................................................................................ 16

1.5.4.2.1 Request Frame Format ....................................................................................................................................... 16

1.5.4.2.2 Response Frame Format .................................................................................................................................... 16

1.5.5 Definition and Format for the Write Single Register Command ............................................................................. 16

1.5.5.1 Definition for the Write Single Register Command .............................................................................................. 16

1.5.5.2 Format for the Write Single Register Command ................................................................................................... 17

1.5.5.2.1 Request Frame Format ....................................................................................................................................... 17

1.5.5.2.2 Response Frame Format .................................................................................................................................... 17

2 Modbus Card Signal List ........................................................................................................... 18

2.1 Collection and Configuration ...................................................................................................................................... 18

2.1.1 Signal List Description ............................................................................................................................................ 18

Issue 02 (2016-03-10)

Huawei Proprietary and Confidential

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