Vacon 20 - Table of Contents

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Table of Contents
Document: DPD01925A
Version release date: 30.5.17
1. Safety................................................................................................................2
1.1 Danger.................................................................................................................................2
1.2 Warnings .............................................................................................................................3
1.3 Earthing and earth fault protection ....................................................................................4
2. Modbus - general info.......................................................................................5
2.1 Restrictions .........................................................................................................................6
3. Modbus technical data ......................................................................................7
3.1 Modbus RTU protocol .........................................................................................................7
3.2 Connections and wiring ......................................................................................................7
4. Installation........................................................................................................8
4.1 Installation in VACON® 20 family AC drives ......................................................................8
4.1.1 Preparation for use through RS485....................................................................................8
5. Fieldbus parametrization ...............................................................................10
5.1 Fieldbus control and basic reference selection...............................................................10
5.2 Modbus RTU parameters and monitoring values ............................................................10
5.2.1 Fieldbus protocol ..............................................................................................................11
5.2.2 Slave address ....................................................................................................................11
5.2.3 Baud rate...........................................................................................................................11
5.2.4 Parity type .........................................................................................................................12
5.2.5 Communication timeout ...................................................................................................12
5.2.6 Reset communication status ............................................................................................12
5.2.7 Communication status......................................................................................................12
6. Communications .............................................................................................13
6.1 Modbus address area .......................................................................................................13
6.2 Supported Modbus Functions...........................................................................................13
6.3 Modbus data mapping.......................................................................................................14
6.3.1 Modbus process data in VACON® 20 Application ACCN1004..........................................14
6.3.2 Modbus process data in VACON® 20X and VACON® CP Application ACIT1075 .............17
6.4 Example messages ...........................................................................................................20
6.4.1 Example 1 - Write Process Data.......................................................................................20
6.4.2 Example 2 - Read process data ........................................................................................21
7. Fault tracing ...................................................................................................22
7.1 Typical fault conditions .....................................................................................................22
7.2 RS-485 bus biasing ...........................................................................................................22
7.3 Other fault conditions .......................................................................................................23
8. Quick setup .....................................................................................................24
9. APPENDIX 1 - PROCESS DATA ........................................................................25