Introduction, Presentation | Schneider Electric VW3 A3 303 manual

3. Introduction

3. 1. Presentation

The communication card (catalog number VW3 A8 303) is used to connect an Altivar 71 drive to a Uni-Telway or Modbus bus.

This manual only describes how to use the Modbus protocol. For Uni-Telway, please refer to the Uni-Telway protocol manual.

The data exchanges permit access to all Altivar 71 functions:

•Configuration

•Adjustment

•Control and command

•Monitoring

•Diagnostics

The card has a female 9-way SUB-D connector for connection to the Modbus bus.

The connection cables and accessories should be ordered separately.

The drive address should be configured using the switches on the card.

The graphic display terminal or the integrated display terminal offer numerous functions for communication diagnostics.

Note: The Modbus card supports the following services in addition to those provided by the drive’s integrated ports:

-2-wire and 4-wire RS485

-Choice of line polarization

-RTU and ASCII modes

-More diagnostic subcodes

-More Modbus functions (04: Read Input Registers and 11: Get Comm Event Counter)

3.2. Notation

Drive terminal displays

The graphic display terminal menus are shown in square brackets.

Example: [1.9 COMMUNICATION]

The integrated 7-segment display terminal menus are shown in round brackets.

Example: (COM-)

Parameter names displayed on the graphic display terminal are shown in square brackets.

Example: [Fallback speed]

Parameter codes displayed on the integrated 7-segment display terminal are shown in round brackets. Example: (LFF)

Formats

Hexadecimal values are written as follows: 16#

Binary values are written as follows: 2#

Abbreviations

Hi: High order

Lo: Low order

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Schneider Electric VW3 A3 303 user manual Introduction, Presentation, Notation

Contents

Altivar Contents Electric shock will result in death or serious injury Before you begin Documentation structure Installation ManualProgramming Manual Communication Parameters Manual Notation IntroductionPresentation Installing the card in the drive Hardware setupReceipt Hardware description Coding the address Switch codingChoosing polarization 1234 Address Modbus RS485 standard Connecting to the busWiring recommendations Connection cables Connection via RJ45 wiring systemConnection accessories Type of master Master interface Description Catalog number Connection cables for the masterTWD XCA RJ030 TSX SCP CM Description Catalog Number Subscriber socket Connection via junction boxesRS485 double shielded twisted pair Cables TSX P ACC TSX CSA500 Communication parameters Configuration Control via Modbus in I/O profile Control CommandControl via Modbus or the terminals in I/O profile Parameter Value Comment Control via Modbus or the terminals in Drivecom profile Control via Modbus in Drivecom profile Configuration Communication scanner Example of configuration via the graphic display terminalRDY NET COM. Scanner Input COM. Fault Management Communication faults Monitored parameters CONFIG. COMM. MAPFormat Format Range Terminal display Checking the address DiagnosticsLEDs Green RUN Red ERR Meaning Corrective action Communication MAP RUN NETCOM. Scanner Input MAP COM Scan Output MAP CMD. Word Image COM Scan Output MAP Input variable Scanner parameterOutput variable Scanner parameter Card fault Communication fault Slave Slave j Slave k Modbus protocolPrinciple Ascii mode RTU modeModes Slave address Function code Data Code Modbus name Description Broadcast Size of data Modbus functions availableRead Holding/Input Registers 3/4 Write Single Register Diagnostics Write Multiple Registers 16 = 16#10 Get Comm Event Counter 11 = 16#0B Read/Write Multiple Registers 23 = 16#17 Machine Read Device Identification 43 = 16#2B MEI Example of positive response Code Modbus name Description Size of data Output variables Logic address Default assignmentInput variables Logic address Default assignment Parameter Logic Input variable address Logic address Default valueParameter Logic Read Parameter assigned Output controlInput monitoring Value Parameter assigned Response Code Error codeException responses Logic address Parameter Value Read non-existent or protected parameters RS485 standard Appendix Master Modbus 2-wire standard schematic Modbus 4-wire standard schematic Uni-Telway schematic Type of trunk cable Cable with 1 shielded twisted pair Wire Jbus schematic Recommendations Creating a Modbus bus using non-standard equipmentDifferent scenarios Example Calculating the polarization Card connector pinout RS485 schematic for the cardContact no. Signal SUB-D Atv71ModbusJbusENV1 2005-05