Diagnostic LEDs

Diagnostic LEDs 1: Diagnostic LEDs 2:

Ethernet interface X001

Interface X001	Ethernet (CX8090, CX8091)	Meaning
LED green	on	Link present
LED yellow	flashing	Activity

Ethernet interface X101 and X102

Interface X101-102	Ethernet (CX8090, CX8091)	Meaning
LED green	flashing	Activity
LED yellow	is not used	-

LED coupler

Labelling	Meaning	Colour	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 3: Diagnostic LEDs 4:

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 centre, 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 centre, 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 length is not correct	Check the configuration and the K-Bus terminals
7 pulses	1..n	K-Bus Reset error	Check the K-Bus terminals