Despatch Protocol Plus Modbus Communications User Manual Page 6
- Page / 53
- Table of contents
- BOOKMARKS
- Despatch Protocol 1
- Revision History 2
- Approvals 2
- Table of Contents 3
- A-51643 Rev. 6 10/06/03 iii 4
- List of Figures and Tables 5
- A-51643 Rev. 6 10/06/03 v 6
- 1 Overview 7
- 2.1 Support Specifications 8
- 2.2 Timing Specifications 8
- 2.3 Wiring 8
- RS232 Jumper Settings 11
- RS422 Jumper Settings 11
- RS485 Jumper Settings 11
- 3 Register and I/O Mapping 12
- Control Loop Input Registers 14
- Global Input Registers 14
- A-51643 Rev. 6 10/06/03 9 15
- Global Holding Registers 16
- A-51643 Rev. 6 10/06/03 11 17
- A-51643 Rev. 6 10/06/03 12 18
- A-51643 Rev. 6 10/06/03 13 19
- A-51643 Rev. 6 10/06/03 14 20
- 4 Application Operations 21
- Inputs, and Discrete Outputs 23
- 5 Function Set Details 26
- 6.1 Protocol Format 43
- 6.2 RTU Transmission Mode 43
- 6.3 Address Field 44
- 6.4 Function Field 44
- 6.5 Data Field 45
- 6.6 Error Checking Field 45
- A-51643 Rev. 6 10/06/03 40 46
- Figure 6 CRC Flowchart 46
- 7.1 Code Example 48
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