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

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.
		or turned off
On	On	Drive starting
On	Off	Normal operation
		Communication fault	• Check the environment (electromagnetic compatibility).
Off	On		•	Check the wiring.
		on the bus	•	Check that the master is communicating within the time out period
				(= 10 s).
			• Check the environment (electromagnetic compatibility).
			•	Check the communication parameter configuration (protocol, speed,
Off	Flashing	Error on character received		format).
			• 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		•	Check that only one communication card has been installed.
		[internal com. link] (ILF)	•	Check that no more than two option cards have been installed.
			•	Replace the communication card.
			• Inspect or repair the drive.

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