Diagnostic LEDs

Diagnostic LEDs 1:

Ethernet interface X001

Interface X001	Ethernet (CX8090)	Meaning
LED green	on	Link present
LED yellow	flashing	Activity

LED coupler

Labelling	Meaning	Color	Meaning
TC	Displays the TwinCAT mode	red	TwinCAT in Stop
		Green	TwinCAT in Running Mode
		Blue	TwinCAT in Config Mode
WD*	no function	-	-
ERR*	Error or Boot Diagnosis LED	red when switching on	Software is being loaded
ERR*	Error or Boot Diagnosis LED	off	Everything OK

*) The WD and ERR LED can be set and used by function block.

LED power supply terminal

Diagnostic LEDs 2: Diagnostic LEDs 3:

Operation with K-bus terminals Operation with E-bus terminals

Display LED	Description	Meaning
1 Us 24 V (top left, 1st row)	CX80xx supply voltage	connected to -24 V
2 Up 24 V (top right, 1st row)	Power contacts supply voltage	connected to -24 V
3 L/A (left center, 2nd row)	EtherCAT LED	flashing green: EtherCAT communication active connected to E-bus / no data traffic not connected to E-bus
4 K-BUS RUN (right center, 2nd row)	K-bus LED RUN	Lights up green: K-bus running, everything OK
6 K-BUS ERR (bottom right, 3rd row)	K-bus LED ERR	Lights up red: K-bus error - see K-bus error code

K-bus error code

Error code	Error code argument	Description	Remedy
Persistent, continuous flashing		EMC problems	Check power supply for undervoltage or overvoltage peaks Implement EMC measures If a K-bus error is present, it can be localized by a restart of the coupler (by switching it off and then on again)
3 pulses	0	K-bus command error	- No Bus Terminal inserted - One of the Bus Terminals is defective; halve the number of Bus Terminals attached and check whether the error is still present with the remaining Bus Terminals. Repeat until the defective Bus Terminal is located.
4 pulses	0	K-Bus data error, break behind the Bus Coupler	Check whether the n+1 Bus Terminal is correctly connected; replace if necessary.
4 pulses	n	Break behind Bus Terminal n	Check whether the bus end terminal 9010 is connected.
5 pulses	n	K-bus error in register communication with Bus Terminal n	Exchange the nth bus terminal
6 pulses	0	Error at initialization	Exchange Bus Coupler
	1	Internal data error	Perform a hardware reset on the Bus Coupler (switch off and on again)
	8	Internal data error	Perform a hardware reset on the Bus Coupler (switch off and on again)
7 pulses	0	Process data lengths do not correspond to the configuration	Check the Bus Terminals for the configured Bus Terminals
7 pulses	1..n	K-bus reset failed	Check the Bus Terminals