Schneider Electric VW3 A3 303 user manual Diagnostics, Checking the address, LEDs

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7. Diagnostics

7. 1. Checking the address

On the graphic display terminal or integrated display terminal, check the address that has been coded on the switches using the [Address] (AdrC) parameter in the [1.9 COMMUNICATION] (COM-)menu, [Uni-Telway / Modbus] (UtL-)submenu.

This parameter cannot be modified.

7. 2. LEDs

The Modbus card has 2 LEDs, RUN and ERR, which are visible through the drive cover.

1.1

1.2

1.3

1.4

1.5

2.1 RUN (green)

2.2 ERR (red)

2.3

2.4

2.5

	Green RUN	Red ERR	Meaning		Corrective action
	LED	LED
	Off	Off	Drive not operating	Check the power supply.
	Off	Off	or turned off
			or turned off
	On	On	Drive starting
	On	Off	Normal operation

			Communication fault	• Check the environment (electromagnetic compatibility).
	Off	On	Communication fault	•	Check the wiring.
	Off	On	on the bus	•	Check that the master is communicating within the time out period
			on the bus	•
					(= 10 s).

				• Check the environment (electromagnetic compatibility).
				•	Check the communication parameter configuration (protocol, speed,
	Off	Flashing	Error on character received		format).
	Off	Flashing	Error on character received	• Do not forget that the communication parameter configuration is only

					taken into account by the drive following a power break.
				•	Check that the slave address is unique.
				• Check the environment (electromagnetic compatibility).
			Card fault	• Check the card/drive connection.
	Flashing	Off	Card fault	•	Check that only one communication card has been installed.
	Flashing	Off	[internal com. link] (ILF)	•	Check that no more than two option cards have been installed.
			[internal com. link] (ILF)	•
				•	Replace the communication card.
				• Inspect or repair the drive.

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Contents Altivar Contents Electric shock will result in death or serious injury Before you beginDocumentation structure Installation ManualProgramming Manual Communication Parameters ManualIntroduction PresentationNotation Installing the card in the drive Hardware setupReceipt Hardware descriptionSwitch coding Choosing polarizationCoding the address 1234 AddressConnecting to the bus Wiring recommendationsModbus RS485 standard Connection via RJ45 wiring system Connection accessoriesConnection cables Type of master Master interface Description Catalog number Connection cables for the masterTWD XCA RJ030 TSX SCP CMDescription Catalog Number Subscriber socket Connection via junction boxesRS485 double shielded twisted pair CablesTSX P ACC TSX CSA500Communication parameters ConfigurationControl via Modbus in I/O profile Control CommandControl via Modbus or the terminals in I/O profile Parameter Value CommentControl via Modbus or the terminals in Drivecom profile Control via Modbus in Drivecom profileConfiguration Communication scanner Example of configuration via the graphic display terminalRDY NET COM. Scanner InputCOM. Fault Management Communication faultsMonitored parameters CONFIG. COMM. MAPFormat Format Range Terminal displayChecking the address DiagnosticsLEDs Green RUN Red ERR Meaning Corrective actionCommunication MAP RUN NETCOM. Scanner Input MAP COM Scan Output MAP CMD. Word ImageInput variable Scanner parameter Output variable Scanner parameterCOM Scan Output MAP Card fault Communication faultModbus protocol PrincipleSlave Slave j Slave k Ascii mode RTU modeModes Slave address Function code DataModbus functions available Read Holding/Input Registers 3/4Code Modbus name Description Broadcast Size of data Write Single Register Diagnostics Write Multiple Registers 16 = 16#10 Get Comm Event Counter 11 = 16#0BRead/Write Multiple Registers 23 = 16#17 Machine Read Device Identification 43 = 16#2BMEI Example of positive responseOutput variables Logic address Default assignment Input variables Logic address Default assignmentCode Modbus name Description Size of data Input variable address Logic address Default value Parameter Logic ReadParameter Logic Parameter assigned Output controlInput monitoring Value Parameter assignedCode Error code Exception responsesResponse Logic address Parameter Value Read non-existent or protected parametersRS485 standard AppendixMaster Modbus 2-wire standard schematicModbus 4-wire standard schematic Uni-Telway schematic Type of trunk cable Cable with 1 shielded twisted pair Wire Jbus schematicCreating a Modbus bus using non-standard equipment Different scenariosRecommendations Example Calculating the polarizationCard connector pinout RS485 schematic for the cardContact no. Signal SUB-DAtv71ModbusJbusENV1 2005-05