Vacon 20 User Manual
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Vacon 20 User Manual

Ac drives
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modbus rtu
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Summary of Contents for Vacon 20

  • Page 1 ® vacon 20 x ® vacon 20 cp ® ac drives modbus rtu user manual...

  • Page 3: Table Of Contents

    Supported Modbus Functions ...................13 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 Example messages ......................20 6.4.1 Example 1 - Write Process Data..................20 6.4.2 Example 2 - Read process data ..................21 Fault tracing ....................22...

  • Page 4: Safety

    • 2 Safety AFETY This manual contains clearly marked cautions and warnings which are intended for your personal safety and to avoid any unintentional damage to the product or connected appliances. Please read the information included in cautions and warnings carefully.

  • Page 5: Warnings

    (EN 60204-1). 13006.emf ® Only spare parts delivered by VACON can be used. 13006.emf At power-up, power break or fault reset the motor will start immediately if the start signal is active, unless the pulse control for Start/Stop logic has been selected.

  • Page 6: Earthing And Earth Fault Protection

    • 4 Safety Earthing and earth fault protection CAUTION! 13006.emf The AC drive must always be earthed with an earthing conductor connected to the earthing terminal marked with The earth leakage current of the drive exceeds 3.5mA AC. According to EN61800-5-1, one or more...

  • Page 7: Modbus - General Info

    ® Your VACON 20 family AC drive is equipped with Modbus support as standard. If you need to con- ® tact VACON service in problems related to Modbus, send a description of the problem together ®...

  • Page 8: Restrictions

    • 6 Modbus - general info Ethernet Modbus TCP Switch Modbus master Modbus RTU 11781_uk Figure 2.Principal example diagram of Modbus Restrictions When a fieldbus option board or an OPTBH option board has been installed, Modbus is not working.

  • Page 9: Modbus Technical Data

    Modbus technical data vacon • 7 ODBUS TECHNICAL DATA Modbus RTU protocol Modbus RTU is the only supported transmission mode. Modbus ASCII mode is not supported. Table 2. Interface RS-485 Data transfer method RS-485 MS/TP, half-duplex Transfer cable STP (Shielded Twisted Pair) Connector 2.5 mm...

  • Page 10: Installation

    Installation in VACON 20 family AC drives ® ® The connection for RS485 is on the standard I/O terminals (A and B). See VACON 20 or VACON X /CP Installation Manual depending on the drive you are using. 4.1.1 Preparation for use through RS485 Strip about 15 mm of the RS485 cable and cut off the grey cable shield.
  • Page 11 ® ends. VACON 20 has a built-in termination resistor which is switched off as a default (presented below). The termination resistor can be switched on and off with the right hand dip switch located above IO-terminals in the front of the drive (see below).

  • Page 12: Fieldbus Parametrization

    NOTE! The motor control mode should be selected to support the used process and profile. The navigation path to the fieldbus parameters may differ from application to application. The ® exemplary paths below apply to the VACON 20 family AC drive. Fieldbus control and basic reference selection The following tables list some of the parameters related to fieldbus control.

  • Page 13: Fieldbus Protocol

    - 1-bit with parity type “Even” and “Odd”. Communication time P2.7 Reset communication P2.8 status ® (*) Only on VACON 20CP/X. 5.2.1 Fieldbus protocol Use this parameter to activate the Modbus protocol. 5.2.2 Slave address Each slave must have a unique address (from 1 to 247) so that it can be addressed independently from other nodes.

  • Page 14: Parity Type

    • 12 Fieldbus parametrization 5.2.4 Parity type You can select the parity type for the network. Modbus RTU specifies the stop bit configuration shown in table below. You can modify this stop bit configuration manually using parameter. Table 5. Parity type and stop bits...

  • Page 15: Communications

    Modbus address area ® The Modbus interface of VACON 20/X uses the ID numbers of the application parameters as addresses. The ID numbers can be found in the parameter tables described in specific Application Manual. When several parameters / monitoring values are read at a time, they must be consecutive.

  • Page 16: Modbus Data Mapping

    Process data is an address area for fieldbus control. Fieldbus control is active when the value of parameter 2.1 (Control place) is 1 (= fieldbus). The content of the process data can be programmed ® in the application.The following tables present the process data contents in VACON 20 Application. ®...
  • Page 17 Communications vacon • 15 Table 9. Input process data Modbus register Name Scale Type 2001 32001, 42001 FB Control Word Binary coded 2002 32002, 42002 FB General Control Word Binary coded 2003 32003, 42003 Actual speed 0.01 2004 32004, 42004 Programmable by P10.9...
  • Page 18 • 16 Communications General status word (output process data) Information about the status of the device and messages is indicated in the General status word. The General status word is composed of 16 bits the meanings of which are described in the table below: Table 11.

  • Page 19: Modbus Process Data In Vacon® 20X And Vacon® Cp Application Acit1075

    Process data is an address area for fieldbus control. Fieldbus control is active when the value of parameter 1.11 (Control place) is 2 (= fieldbus). The content of the process data can be programmed ® in the application.The following tables present the process data contents in VACON ACIT1075 ®...
  • Page 20 • 18 Communications Fieldbus data input mapping Fieldbus Data inputs from 1 to 5 can be configured, with parameters P11.9 - P11.12, as: Table 14. Process Data IN Description Note • b0 Enable is considered only when control place is the Fieldbus. It is computed in AND with a possible enable from digital input.
  • Page 21 Communications vacon • 19 6.3.2.2 Fieldbus Data OUT: Slave -> Master Table 15. Modbus Name Description Range Register Binary coded: b0: Ready b1: Run b2: Reverse 2101 Status word Drive state b3: Fault b4: Warning b5: Freq. reference reached b6: Zero speed...

  • Page 22: Example Messages

    • 20 Communications Example messages 6.4.1 Example 1 - Write Process Data Write the process data 42001…42003 with command 16 (Preset Multiple Registers). Command Master - Slave: Table 16. ADDRESS 01 hex Slave address 1 hex (= 1) FUNCTION...

  • Page 23: Example 2 - Read Process Data

    Communications vacon • 21 Reply frame: Table 19. 01 10 07 D0 00 03 80 85 6.4.2 Example 2 - Read process data Read the Process Data 42103…42104 with command 4 (Read Input Registers): for this example when using ACCN1004 set P10.1=1, when using ACIT1075 set P11.1=0.

  • Page 24: Fault Tracing

    • 22 Fault tracing AULT TRACING When an unusual operating condition is detected by the AC drive control diagnostics, the drive ini- tiates a notification visible, for example, on the keypad. The keypad will show the ordinal number of the fault, the fault code.

  • Page 25: Other Fault Conditions

    Fault tracing vacon • 23 Other fault conditions The following fault tracing diagram will help you to locate and fix some of the most usual problems. If the problem persists contact your local distributor. 9330A.emf Figure 3. Fault tracing diagram for Modbus RTU...

  • Page 26: Quick Setup

    • P2.1 in VACON ® ® • P1.11 in VACON 20 X and VACON 20 CP Make these settings in the master software A. Set Control Word to '0' by writing the data 0000h to the register 2001 B. Set Control Word to '1' by writing the data 0001h to the register 2001 C.

  • Page 27: Appendix 1 - Process Data

    APPENDIX 1 - PROCESS DATA vacon • 25 APPENDIX 1 - PROCESS DATA Process Data IN (Master to Slave) Use of Process Data In variables depends on the used application. The configuration of the data is free. Process Data OUT (Slave to Master) Use of Process Data Out variables depends on the used application.
  • Page 28 Document ID: Vacon Ltd DPD01925A Member of the Danfoss Group Rev. A Runsorintie 7 65380 Vaasa Sales code: DOC-INSV20MODBUS+DLUK Finland...

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