Diagnostic LEDs

After switching on, the Bus Coupler immediately checks the connected configuration. Error-free start-up is indicated when the red I/O ERR LED goes out. If the I/O ERR LED blinks, an error in the area of the terminals is indicated. The error code can be determined from the frequency and number of blinks. This permits rapid rectification of the error.

The Bus Coupler has two groups of LEDs for the display of status. The upper group with four LEDs indicates the status of the respective fieldbus. The significance of the fieldbus status LEDs is explained in the appropriate sections of this manual. It corresponds to the usual fieldbus display.

On the upper right hand side of the Bus Couplers are two more green LEDs that indicate the supply voltage. The left hand LED indicates the presence of the 24 V supply for the Bus Coupler. The right hand LED indicates the presence of the supply to the power contacts.

Diagnostic LEDs 1: — LEDs of Bus Couplers BK9053 and BK9103

LEDs for power supply diagnostics

LED	Meaning
LED Us	off	the power supply voltage, Us, is not present
LED Us	on	the power supply voltage, Us, is present
LED Up	off	Supply voltage Up (for power contacts) not available
LED Up	on	Supply voltage Up (for power contacts) available

LEDs at RJ45

LED	Meaning
LED Link/Act	off	No physical connection present
	on	Physical connection present
	flashing	Communication available
LED 10/100 Mbaud (only BK9103)	off	10 Mbaud (if LED Link/Act is lit or flashes)
LED 10/100 Mbaud (only BK9103)	on	100 Mbaud

LEDs for PROFINET diagnostics

PROFINET diagnosis	PN Err (red)	PN Run (green)	DIAG E (red)	DIAG R (green)
IP Address OK	off	0,5 s	x	x
No IP valid Address (Dip Switch 9,10 -> on)	0,1 sec	off	x	x
Online	off	on	x	x
Offline PLC Stop	off	0,1 s	x	x
TimeOut	0,5 s	off	x	x
IP address configuration fault	on	off	x	x
Alternate flashing (triggered by a Profinet tool)	0.5 sec	0.5 sec	x	x

Configuration Diagnose	PN Err (red)	PN Run (green)	DIAG E (red)	DIAG R (green)
OK	x	x	off	on
Wrong module	x	x	Slot number	1
Missing module (physical)	x	x	Slot number	2
Missing module (in the configuration)	x	x	Slot number	3
No PROFINET name assigned	x	x	0	4
Substitute	x	x	Slot number	5

x: The status of the LED is not relevant for this diagnosis.

Note:

In the event of several errors the last faulty module is displayed.
Substitute is set for incorrectly configured modules that are nevertheless executable (example: KL2xx2 was configured but KL2xx4 was inserted in the slot)

Sample

You have configured a KL2xx4 for the fifth slot, but in fact only four modules are inserted.

Start Error Code: Red DIAG E LED flickers rapidly, green DIAG R LED is off
Red DIAG E LED is on, green LED shows the error code and flashes twice (0.5 sec)
Red and green LED off
Red DIAG E LED shows the error argument and flashes 5 times (0.5 sec, in this case the slot number), green LED is off

Diagnostic LEDs 2: — Example for Error Code and Error Argument

LEDs for K-bus diagnostics

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)
1 pulse	0	EEPROM checksum error	Set manufacturer's settings with the KS2000 configuration software
	1	Code buffer overflow	Insert fewer Bus Terminals. Too many entries in the table for the programmed configuration
	2	Unknown data type	Software update required for the Bus Coupler
2 pulses	0	Programmed configuration has an incorrect table entry	Check programmed configuration for correctness
2 pulses	n (n > 0)	Table comparison (Bus Terminal n)	Incorrect table entry
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 n^th 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)
	4	DIP switch incorrect for BootP	Set 1-8 to on or off, see BootP
	8	Internal data error	Perform a hardware reset on the Bus Coupler (switch off and on again)
	16	Error in IP socket	Perform a hardware reset on the Bus Coupler (switch off and on again)
14 pulses	n	n^th Bus Terminal has the wrong format	Start the Bus Coupler again, and if the error occurs again then exchange the Bus Terminal
15 pulses	n	Number of Bus Terminals is no longer correct	Start the Bus Coupler again. If the error occurs again, restore the manufacturers setting using the KS2000 configuration software
16 pulses	n	Length of the K-bus data is no longer correct	Start the Bus Coupler again. If the error occurs again, restore the manufacturers setting using the KS2000 configuration software