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Changes for page 5.2 Modbus protocol

Last modified by Admin on 2026/04/24 10:30
From version 7.2
edited by Admin
on 2024/12/11 11:21
Change comment: Update document after refactoring.
To version 5.2
edited by Admin
on 2024/12/04 10:49
Change comment: Update document after refactoring.

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Title
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1 -5.2 Modbus protocol
1 +4.2 Modbus protocol
Parent
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1 -Battery management systems.BMS Main 2\.1.5\. Communication protocols.WebHome
1 +drafts.BMS Main 2\.1.5\. Communication protocols.WebHome
Content
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1 -(% data-numbered-headings-start="5" style="--numbered-headings-start: 4;font-size: 0px;color: rgba(0, 0, 0, 0.0);margin-bottom: 0px; margin-top: 0px;" %)
2 -= Communication protocols =
1 +== 4.2.1 General information ==
3 3  
4 -(% data-numbered-headings-start="2" style="--numbered-headings-start: 1;font-size: 0px;color: rgba(0, 0, 0, 0.0);margin-bottom: 0px; margin-top: 0px;" %)
5 -== Modbus protocol ==
6 -
7 -=== General information ===
8 -
9 9  The BMS Main 2.x device provides the information about the battery system using Modbus protocol. The BMS is a Modbus-server and it responds to the Modbus-client’s commands.
10 10  
11 11  Interaction with the device is performed over the RS-485 bus (Modbus RTU) or the Ethernet network (Modbus TCP).
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34 34  
35 35  Words are in the **little endian**.
36 36  
37 -=== Input registers ===
31 +== 4.2.2 Input registers ==
38 38  
39 39  (% style="width:651px" %)
40 40  |(% style="width:92px" %)**Register address**|(% style="width:94px" %)**Number of registers**|(% style="width:368px" %)**Content**|(% style="width:96px" %)**Type**
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486 486  |(% style="width:92px" %)**0x2426**|(% style="width:94px" %)2|(% style="width:368px" %)Maximum charge current, A|(% style="width:96px" %)REAL32
487 487  |(% style="width:92px" %)**0x2428**|(% style="width:94px" %)2|(% style="width:368px" %)Maximum discharge current, A|(% style="width:96px" %)REAL32
488 488  
489 -=== Holding registers ===
483 +== 4.2.3 Holding registers ==
490 490  
491 491  (% style="width:653px" %)
492 492  |(% style="width:92px" %)**Register address**|(% style="width:94px" %)**Number of registers**|(% style="width:368px" %)**Content**|(% style="width:96px" %)**Type**