Diagnostic LEDs

The Bus Terminal Controllers have status LEDs. The row of LEDs on the left describes the status of the fieldbus and of the PLC. The row of LEDs on the right indicates the supply voltage and the K-Bus state.

Diagnostic LEDs 1: — LEDs

LEDs for power supply diagnostics

LED (Power LEDs)	Meaning
LED Us	LED off: Bus Terminal Controller does not have 24 V_DCvoltage
LED Up	LED off: No power supply 24 V_DC connected at the power contacts

LEDs for K-Bus diagnostics

LED (Power LEDs)	Meaning
LED RUN	LED off: No K-Bus Update LED on, flashing: K-bus running
LED ERR	LED off: No error LED flashing: see K-Bus error code

K-Bus error code diagnostics

Error code	Error  argument	Description	Remedy
0	-	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	0	EEPROM checksum error	Enter factory settings with the KS2000 configuration software
	1	Code buffer overflow	Insert fewer Bus Terminals. The programmed configuration has too many entries in the table
	2	Unknown data type	Software update required for the Bus Terminal Controller
2	-	Reserve	-
3	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	0	K-bus data error, break behind the Bus Terminal Controller	Check whether the n+1 Bus Terminal is correctly connected; replace if necessary.
4	n	Break behind Bus Terminal n	Check whether the KL9010 Bus End Terminal is connected
5	n	K-bus error in register communication with Bus Terminal n	Exchange the nth Bus Terminal
6	0	Error at initialization	Exchange Bus Terminal Controller
	1	Internal data error	Perform a hardware reset on the Bus Terminal Controller (switch off and on again)
	2	DIP switch changed after a software reset	Perform a hardware reset on the Bus Terminal Controller (switch off and on again)
7	0	Note: cycle time was exceeded	Warning: the set cycle time was exceeded. This indication (flashing LEDs) can only be cleared by booting the Bus Terminal Controller again. Remedy: increase the cycle time
9	0	Checksum error in Flash program	Transmit program to the BX again
9	1	Incorrect or faulty library implemented	Remove the faulty library
10	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	n	nth Bus Terminal has the wrong format	Start the Bus Terminal Controller again, and if the error occurs again then exchange the Bus Terminal.
15	n	Number of Bus Terminals is no longer correct	Start the Bus Terminal Controller again. If the error occurs again, restore the manufacturers setting using the KS2000 configuration software
16	n	Length of the K-bus data is no longer correct	Start the Bus Terminal Controller again. If the error occurs again, restore the manufacturers setting using the KS2000 configuration software

LED bus - fieldbus diagnostics

LED RUN	LED BF CAN ERR	LED DIA CAN RxTx Overflow	Meaning
off	off	off	no fieldbus connected, Bus Terminal Controller searches for baud rate
on	on	off	Stopped, pre-operational, no error
on	off	off	Operational, no error
off	flashes	off	Bus-Off
off	on	on	Warning Level
on	on	Flashes quickly, then 1 x slowly	Guarding error
on	on	Flashes quickly, then 2 x slowly	Sync error
on	on	Flashes quickly, then 3 x slowly	Event-Timeout

LED PLC - PLC diagnostics

LED	Meaning
PLC LED	LED on: PLC is running LED off: PLC stopped