AS-i Modbus Gateway
Table of Contents
Subject to reasonable modifications due to technical advances.
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Operation via Modbus ........................................................................... 37
7.1
Configuring the Interface ..................................................................................... 37
7.2
Message Structure ................................................................................................ 37
7.3
Modbus Functions ................................................................................................ 38
7.3.1
Function 1: “Read Coil Status” ................................................................................ 38
7.3.2
Function 2: “Read Input Status” .............................................................................. 38
7.3.3
Function 3: “Read Holding Registers” ..................................................................... 38
7.3.4
Function 4: “Read Input Registers” ......................................................................... 39
7.3.5
Function 5: “Force Single Coil” ............................................................................... 39
7.3.6
Function 6: “Preset Single Register” ....................................................................... 39
7.3.7
Function 15: “Force Multiple Coils” ......................................................................... 39
7.3.8
Function 16: “Preset Multiple Registers” ................................................................. 40
7.3.9
Function 17: “Report Slave ID” ............................................................................... 40
7.3.10 Function 7: “Read Exception Status” ...................................................................... 40
7.3.11 Function 8: “Diagnostics” ........................................................................................ 41
7.3.12 Function 65: user defined function #1 ..................................................................... 42
7.3.13 Function 66: user defined function #2 ..................................................................... 43
7.3.14 Function 67: user defined function #3 ..................................................................... 44
8
Address-Table of the Modbus Interfaces ............................................ 45
8.1
Discrete Outputs (“Coils”) ................................................................................... 45
8.2
Discrete Inputs (“nputs”) ..................................................................................... 47
8.3
Read/Write-Registers (“Holding Registers”) ...................................................... 48
8.4
Read-Only-Registers (“Input Registers”) ........................................................... 54
9
Appendix: Displays of the Figure Display ........................................... 57
10
Appendix: The First Commissioning of AS-i ...................................... 59
Summary of Contents for AS-i/Modbus Gateway
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