LED Status Display

The LEDs are located at the front of module. There are 2 different groups:

• The 5 system LEDs (PWR, CN-RUN, CN-ERR, S-ERR and I/O-Bus) show the operation status of the module and display possible errors.
• The 27 process LEDs (UP, UP3, inputs, outputs, CH-ERR1 to CH-ERR3) show the process supply voltage and the statuses of the inputs and outputs and display possible errors.

Status of the 5 System-LEDs:

LED	Color	OFF	ON	Flashing
PWR/RUN	green	Process supply voltage missing	Internal supply voltage OK, module ready for communication with IO Controller	Start-up / preparing communication
	yellow	—	—	—
CN-RUN	green	—	Device configured, CANopen® Bus in OPERATIONAL state and cyclic data exchange running	Flashing: CANopen® Bus in PRE-OPERATIONAL state and slave is being configured Single flash: CANopen® Bus in STOPPED state. Flickering: Auto-detect is active
CN-ERR	red	No system error	CANopen® Bus is OFF	Flashing: Configuration error Single flash: Error counter overflow due to too many error frames Double flash: A Node-Guard or a Heartbeat event occurred Flickering: Auto-detect is active
S-ERR	red	No error	Internal error	–
I/O-Bus	green	No expansion modules connected or communication error	Expansion modules connected and operational	—

Status of the 27 process LEDs:

LED	Color	OFF	ON	Flashing
AI0 to AI3	yellow	Input is OFF	Input is ON (brightness depends on the value of the analog signal)	–
AO0 to AO1	yellow	Output is OFF	Output is ON (brightness depends on the value of the analog signal)	–
DI0 to DI7	yellow	Input is OFF	Input is ON (the input voltage is even displayed if the supply voltage is OFF)	–
DO0 toDO7	yellow	Output is OFF	Output is ON	–
UP	green	Process supply voltage missing	Process supply voltage OK and initialization finished	–
UP3	green	Process supply voltage missing	Process supply voltage OK	–
CH-ERR1 to CH-ERR3	red	No error or process supply voltage missing	Internal error	Error on one channel of the corresponding group