Danfoss Modbus RTU Manual

Option card for vlt 5000/6000 adjustable frequency drive

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Modbus RTU Option

Card

for

VLT 5000/6000

Adjustable Frequency Drive

VLT is a registered Danfoss trade mark

MG.10.P2.22

Table of Contents

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Summary of Contents for Danfoss Modbus RTU

Page 1 Modbus RTU Option Card VLT 5000/6000 Adjustable Frequency Drive VLT is a registered Danfoss trade mark MG.10.P2.22...
Page 2 AC line. To be sure that capacitors have fully discharged, wait 14 minutes for 220 and 500 V units, wait 30 minutes for 550-600 V units after power has been removed before touching any internal component. MG.10.P2.22 VLT is a registered Danfoss trade mark...
Page 3: Table Of Contents
What You Should Already Know ............. 4 Modbus Overview ..................5 Pre-installation Option Card and Drive Settings Modbus RTU Option Card Baud Rate and Parity Settings ....7 Modbus RTU Option Card Address Settings.......... 8 VLT Parameter Settings ................8 Installation of Modbus Option Card Modbus RTU Option Card Environmental Requirements ......
Page 4: Introduction
Introduction instructions on the installation and set up of operation of the adjustable frequency drive, the Modbus RTU option card for the VLT 5000 refer to the VLT Operating Instructions. and VLT 6000 Adjustable Frequency Drives to communicate over a Modbus network.
Page 5: Modbus Overview
Modbus The common language used by all Modicon ‘queries’). The other devices (slaves) respond controllers is the Modbus RTU protocol. This by supplying the requested data to the protocol defines a message structure that master, or by taking the action requested in...
Page 6 1 Address and Termination 9-Input Dip Switch pin 1 pin 1 Baud Rate and Parity 8-Input Dip Switch pin 1 pin 1 6-Pin Connector to VLT Terminals VLT Modbus RTU Option Card MG.10.P2.22 VLT is a registered Danfoss trade mark...
Page 7: Modbus Rtu Option Card Baud Rate And Parity Settings
Modbus The Modbus communication protocol accesses • Ensure that inputs 1-3 are set to ON (default the internal VLT Danfoss FC protocol to control setting) to select the 9600 baud rate. RTU Option the drive through serial communications. The • Ensure that inputs 4 and 5 are set to ON...
Page 8: Modbus Rtu Option Card Address Settings
The Modbus RTU option card has an address • Set the Modbus address for the VLT in Modbus and termination 9-input dip switch. The Modbus accordance with the table below. The RTU Option network address for the VLT is set by dip switch...
Page 9: Modbus Rtu Option Card Environmental Requirements
Humidity 5% to 95% relative, non-condensing Installation The following section describes the installation procedures for the Modbus RTU option card. Electronic components of VLT For additional information on installation and adjustable frequency drive and operation of the VLT, refer to the VLT Operating Modbus option card are sensitive Instructions.
Page 10 • Unplug two ribbon cables (A) and (B) from Cassette VLT control board. and Ribbon • Unhinge cassette at top to remove. Cables NOTE Ribbon cables will need to be reconnected to same connec- tions from which removed. MG.10.P2.22 VLT is a registered Danfoss trade mark...
Page 11 4. Secure • On back of cassette, insert edge of Modbus RTU option card into slot at side Modbus of cassette (A). RTU Option • Secure opposite side of card with 2 Card self-tapping screws provided (B). 5. Wire NOTE Modbus Use 0.5 to 1.00mm...
Page 12 3 of RS-485 terminal block. Pin 1 • Plug RS-485 terminal block into connector at right side of Modbus option card. RS-485 Connector IP54/NEMA 12 Drives • Close front cover panel and fasten with captive screws. MG.10.P2.22 VLT is a registered Danfoss trade mark...
Page 13: Status Leds
• Solid Red: Major fault, communications halted Modbus LED VLT LED Option Card A loop back test to confirm Modbus RTU option with the table below. card operability can be performed. The option • Remove all wiring from both the 6-pin Operability...
Page 14: Remote Terminal Unit
CRC field is not valid for the combined messages. The entire message frame must be transmitted as a continuous stream. If a silent interval of more than 1.5 character times MG.10.P2.22 VLT is a registered Danfoss trade mark...
Page 15 This can include items like discrete and register addresses, the quantity of items to be handled, and the count of actual data bytes in the field. The data field can have a length of zero. VLT is a registered Danfoss trade mark MG.10.P2.22...
Page 16: Translation From Modbus Rtu Protocol To Fc Protocol
2 2 2 2 2 in the VLT Operating Instructions for details on PCD contains the process word block. The from the Danfoss FC protocol used for Modbus serial parameter value block consists of 2 words (4 Modbus communication within the VLT 5000/VLT 6000 bytes).
Page 17: Memory Mapping
0400 (read) or Valid sizes to read are 1 register (16 bits) and 0500 (write) prior to reading or writing a text 2 registers (32 bits). string. VLT is a registered Danfoss trade mark MG.10.P2.22...
Page 18 Parameter 631, Nameplate: Communication Option Ordering No. 06310 06320 – 06999 Reserved 07000 Parameter 700, Relay 6, Output Function ↓ ↓ 07090 Parameter 709, Relay 9, Off Delay 07100 – 65536 Reserved MG.10.P2.22 VLT is a registered Danfoss trade mark...
Page 19 Parameter 631, Nameplate: Communication Option Ordering No. 06310 06320 – 06999 Reserved Parameter 700, Relay 6, Output Function 07000 ↓ ↓ Parameter 711, Relay 9, Off Delay 07110 07120 – 65536 Reserved VLT is a registered Danfoss trade mark MG.10.P2.22...
Page 20: Message Translation Examples
Examples Modbus function 0F (Force Multiple Coils). Message sent to Modbus RTU option card from Modbus master Message sent to Modbus RTU option card from Modbus master Message sent to Modbus RTU option card from Modbus master Message sent to Modbus RTU option card from Modbus master...
Page 21 Message EXAMPLE TWO: Ramp Stop Motor Translation Message sent to Modbus RTU option card from Modbus master Message sent to Modbus RTU option card from Modbus master Message sent to Modbus RTU option card from Modbus master Message sent to Modbus RTU option card from Modbus master...
Page 22 (continued) Modbus Function 06 Preset Single Register Message sent to Modbus RTU option card from Modbus master Message sent to Modbus RTU option card from Modbus master Message sent to Modbus RTU option card from Modbus master Message sent to Modbus RTU option card from Modbus master...
Page 23 Modbus Function 06 Preset Single Register Message sent to Modbus RTU option card from Modbus master Message sent to Modbus RTU option card from Modbus master Message sent to Modbus RTU option card from Modbus master Message sent to Modbus RTU option card from Modbus master...
Page 24: Exception Codes
Data Change is not possible because factory setup is selected Message Timeout VLT Errors Modbus Code Meaning (decimal) Invalid Data Address Invalid Message Length Invalid Data Length Invalid Function Code Modbus Errors MG.10.P2.22 VLT is a registered Danfoss trade mark...
Page 25: Supported Modbus Function Codes
APPENDIX A Supported Appendix A describes the following functions supported by the Modbus RTU option card. Modbus Function Read Coil Status (01 Read Holding Registers (03 Codes Force Single Coil (05 Preset Single Register (06 Force Multiple Coils (0F Preset Multiple Registers (10...
Page 26 Field Name Example (HEX) Slave Address Function Force Data HI Force Data LO Quantity of Coils HI Quantity of Coils LO Error Check (CRC) – APPENDIX A MG.10.P2.22 VLT is a registered Danfoss trade mark...
Page 27 Field Name Example (HEX) Slave Address Function Coil Address HI Coil Address LO Quantity of Coils HI Quantity of Coils LO Error Check (CRC) – APPENDIX A VLT is a registered Danfoss trade mark MG.10.P2.22...
Page 28 Byte Count Data HI (Register 40001) Data LO (Register 40001) Data HI (Register 40002) Data LO (Register 40002) Data HI (Register 40003) Data LO (Register 40003) Error Check (CRC) – APPENDIX A MG.10.P2.22 VLT is a registered Danfoss trade mark...
Page 29 Field Name Example (HEX) Slave Address Function Register Address HI Register Address LO Preset Data HI Preset Data LO Error Check (CRC) APPENDIX A VLT is a registered Danfoss trade mark MG.10.P2.22...
Page 30 Field Name Example (HEX) Slave Address Function Starting Address HI Starting Address LO No. of Registers HI No. of Registers LO Error Check (CRC) – APPENDIX A MG.10.P2.22 VLT is a registered Danfoss trade mark...