LED Status Displays

The status of the CANopen® Communication Module is displayed by means of status LEDs. After power ON, the Communication Module initializes a self-test. If this test was successful, the yellow RDY LED goes ON. Otherwise the LED starts flashing and aborts the further initialization. If the RDY LED remains OFF, the Communication Module is defective.

In the course of initialization, the RUN LED is OFF for the first time. The LED is only activated after configuration data has been sent to the Communication Module and the operating mode of the Communication Module was set. If the operating system of the Communication Module detects a parameterization or a configuration error, the green RUN LED flashes non-cyclically. If this LED flashes cyclically, the Communication Module is ready for communication, but the communication is not active yet. In case of an active communication, the RUN LED lights continuously.

During the initialization procedure and also if the Communication Module is configured (anew) - in particular if the operating mode was changed - it can occur that all or some LEDs light up for a short period of time, before reaching a defined condition.

The green PWR LED indicates, that the supply voltage is present.

The following figure shows the positions of the LEDs. The table after that shows the LED statuses and their meanings.

LED	Color	Status	Meaning
PWR	green	ON (light)	Voltage is present
		OFF (dark)	Voltage is missing
RDY	yellow	ON	Communication module is ready
		flashes cyclic	Bootstrap Loader is active
		flashes non-cyclic	Hardware or system error
		OFF	Defective hardware or no power supply
RUN	green	ON	Communication is running
		flashes cyclic	Ready for communication
		flashes non-cyclic	Parameterization error
		OFF	No communication or no power supply
STA	yellow	ON	CANopen® master: transmits data
		OFF	CANopen® master: no data
ERR	red	ON	CANopen® error
		OFF	No error