Diagnostic LEDs

BK9000, BK9100, BC9000, BC9100

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.

LEDs for power supply diagnostics

LED	Meaning
Left LED off	Bus Coupler has no power
Right LED off	No power supply 24 V_DC connected at the power contacts

LEDs for fieldbus diagnostics

LED	on	off
LINK (BK9000/BC9000 only)	Physical connection present	No physical connection present
ACT (BK9000/BC9000 only)	Flashing: Bus traffic present	No bus traffic (bus idle)
COM (BK9100/BC9100 only)	Flashing: data received at the controller	no data are received
ERROR	LED flashes slowly if DHCP or BootP is enabled and the Bus Coupler has not yet been allocated an IP address LED flashes quickly (5 times, only when switching on): the Bus Coupler was addressed with ARP. The settings on the DIP SWITCH are not valid. LED permanently on (only in RT-Ethernet mode) Note: task time set too fast	No error
PLC (BC9000/BC9100 only)	PLC program is in RUN mode LED flashes while the boot project is being saved.	PLC program is in stop mode
WDG (BK9000 only)	Watchdog is triggered: - No error	Watchdog expired or not triggered: - Start communication - Reset watchdog error

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	Enter factory 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 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)
	2	DIP switch changed after software reset from firmware BC9000 BB and BC9100 B0: from firmware BK9000 BA and BK9100 B0: IP address already exists in the network	Hardware reset of the Bus Coupler (switch off and back on again) Assign another IP address
	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)
7 pulses (BC9000/BC9100 only)	0	Note: Cycle time was exceeded (see Table 1 Register 17)	Warning: the set cycle time was exceeded. This note (flashing of the LED) can only be reset by rebooting the BC. Remedy: increase the cycle time
9 pulses (BC9000/BC9100 only)	0	Checksum error in Flash program	Transmit program to the BC again
9 pulses (BC9000/BC9100 only)	1	Incorrect or faulty library implemented	Remove the faulty library
10 pulses (BC9000/BC9100 only)	n	Bus Terminal n is not consistent with the configuration that existed when the boot project was created	Check the nth Bus Terminal. The boot project must be deleted if the insertion of an nth Bus Terminal is intentional.
14 pulses	n	nth 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

LEDs for switch diagnosis (BK9100/BC9100 only)

LED	on	Flashes	off
LINK/ACT	Physical connection present	Communication available	No physical connection present
10 / 100 Mbit/s	100 Mbit/s	-	10 Mbit/s