Daitsu MONOBLOC LOGIK II Series Heat Pump Manuals

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Daitsu MONOBLOC LOGIK II Series Installation, Service And User Manual

Daitsu MONOBLOC LOGIK II Series Installation, Service And User Manual (30 pages)

Modbus Protocol (V2.2) for the Heat Pump Water Heater

Brand: Daitsu | Category: Heat Pump | Size: 4.1 MB

Table of Contents

Table of Contents
2
1 Terms and Definitions

3
- Preface
  3
2 Brief Introduction to the BMS System

4
3 Network Topology

4
- General
  4
- Topological Structure
  5
  - Topological Strcutre (＜255)
    5
  - Topological Strucuture (＞255)
    5
4 MODBUS Protocol Format

5
- General
  5
- Protocol Interface
  5
- Hardware Interface
  5
- Universal Communication Frame Format of Modbus under RTU Mode
  8
- Modbus Standard Protocol Format
  8
  - Coil (Bit)
    8
  - Register (Word, 16 Bit)
    9
  - Read Multiple Coils
    9
  - Write Multiple Coils
    9
  - Read Multiple Registers
    10
  - Write Multiple Registers (Word)
    10
  - Alarm Response
    10
5 Communication Protocol for the Versati Heat Pump Water Heater

11
- General
  11
- Precautions before Designing the BMS Interface
  11
- Valid Data for Modbus Communication
  12
- Precautions Befor the Use
  29
  - CRC Calculation Method
    29
  - How to Calculate the CRC
    29
  - CRC Example
    29

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