Modbus 4-wire standard schematic | Schneider Electric VW3 A3 303

9. Appendix

9. 3. Modbus 4-wire standard schematic

Master

G

	TXD1
LT	Slave pair
	TXD0
	RXD1
LT	Master pair
	RXD0

R

5 V

Rp

LT

Rp	5 V

Rp

LT

Rp

Common

G	R	G	R
G		G
Slave 1		Slave n

41

Image 41

Schneider Electric VW3 A3 303 user manual Modbus 4-wire standard schematic

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