RS485 schematic for the card, Sub-D | Schneider Electric VW3 A3 303

Schematic diagram:

9. Appendix

9. 7. RS485 schematic for the card

The RS485 interface on the Modbus card is electricallyisolated from the drive.

Polarization switch

Female

9-way

Pull-up polarization resistor

SUB-D

Pull-down polarization resistor

Enable

Polarization switch

The polarization switches are used to connect or disconnect the pull-up and pull-down resistors, which implement either Modbus (no slave polarization) or Uni-Telway (4.7 kΩ polarization for each station) type polarization.

9. 8. Card connector pinout

Contact no. Signal

1Reserved

2RXD0 = RD(A)

3D0 = A/A’ = D(A)

4Common = C/C’ = 0VL

5RxD1 = RD(B)

6RxD1 = RD(B)

7D1 = B/B’ = D(B)

8Not connected

9Not connected

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Schneider Electric VW3 A3 303 user manual RS485 schematic for the card, Card connector pinout, Sub-D, Contact no. Signal

Contents

Altivar Contents Before you begin Electric shock will result in death or serious injury Programming Manual Installation ManualDocumentation structure Communication Parameters Manual Presentation IntroductionNotation Receipt Hardware setupInstalling the card in the drive Hardware description Choosing polarization Switch codingCoding the address Address 1234 Wiring recommendations Connecting to the busModbus RS485 standard Connection accessories Connection via RJ45 wiring systemConnection cables TWD XCA RJ030 Connection cables for the masterType of master Master interface Description Catalog number TSX SCP CM RS485 double shielded twisted pair Connection via junction boxesDescription Catalog Number Subscriber socket Cables TSX CSA500 TSX P ACC Configuration Communication parameters Control via Modbus or the terminals in I/O profile Control CommandControl via Modbus in I/O profile Parameter Value Comment Control via Modbus in Drivecom profile Control via Modbus or the terminals in Drivecom profile Configuration RDY NET Example of configuration via the graphic display terminalCommunication scanner COM. Scanner Input Communication faults COM. Fault Management Format CONFIG. COMM. MAPMonitored parameters Format Range Terminal display LEDs DiagnosticsChecking the address Green RUN Red ERR Meaning Corrective action COM. Scanner Input MAP RUN NETCommunication MAP COM Scan Output MAP CMD. Word Image Output variable Scanner parameter Input variable Scanner parameterCOM Scan Output MAP Communication fault Card fault Principle Modbus protocolSlave Slave j Slave k Modes RTU modeAscii mode Slave address Function code Data Read Holding/Input Registers 3/4 Modbus functions availableCode Modbus name Description Broadcast Size of data Write Single Register Diagnostics Get Comm Event Counter 11 = 16#0B Write Multiple Registers 16 = 16#10 Read/Write Multiple Registers 23 = 16#17 Read Device Identification 43 = 16#2B Machine Example of positive response MEI Input variables Logic address Default assignment Output variables Logic address Default assignmentCode Modbus name Description Size of data Parameter Logic Read Input variable address Logic address Default valueParameter Logic Input monitoring Output controlParameter assigned Value Parameter assigned Exception responses Code Error codeResponse Read non-existent or protected parameters Logic address Parameter Value Appendix RS485 standard Modbus 2-wire standard schematic Master Modbus 4-wire standard schematic Uni-Telway schematic Wire Jbus schematic Type of trunk cable Cable with 1 shielded twisted pair Different scenarios Creating a Modbus bus using non-standard equipmentRecommendations Calculating the polarization Example Contact no. Signal RS485 schematic for the cardCard connector pinout SUB-D Atv71ModbusJbusENV1 2005-05

Schneider Electric VW3 A3 303 RS485 schematic for the card, Card connector pinout, Sub-D

Models: VW3 A3 303

9. Appendix

9. 7. RS485 schematic for the card

SUB-D

9. 8. Card connector pinout

Contact no. Signal