Diagnostic LEDs

The Bus Terminal Controllers have status LEDs.

BC9050

BC9050 LEDs

LEDs for power supply diagnostics

LED (Power LEDs)

Meaning

Power LED Us off

Bus Coupler has no voltage 24 VDC

Power LED Up off

No power supply 24 VDC connected at the power contacts

LEDs for K-Bus diagnostics

LED (K-bus)

Meaning

K-bus RUN

on or flashing - K-bus running

K-bus ERR

flashing (see error code)

LEDs for Ethernet diagnosis

LED (Ethernet)

Meaning

LINK/ACT

on - LINK available, flashing - LINK available and communication

ERROR

flashing - DHCP or BootP active. Waiting for an IP address

COM

Communication with controller available

LEDs for PLC diagnostics

LED (Ethernet)

Meaning

PLC

on - PLC running, flashing - cycle time is exceeded, off - cycle time exceeded permanently or PLC stopped

TC/DC

on - TwinCAT configuration active, off - Default configuration active, flashing TwinCAT configuration faulty

BC9120

BC9120 LEDs

LEDs for power supply diagnostics

LED (Power LEDs)

Meaning

Power LED Us off

Bus Coupler has no voltage 24 VDC

Power LED Up off

No power supply 24 VDC connected at the power contacts

LEDs for K-Bus diagnostics

LED (K-bus)

Meaning

K-bus RUN

on or flashing - K-bus running

K-bus ERR

flashing (see error code)

LEDs for Ethernet diagnosis

LED (Ethernet)

Meaning

LINK/ACT

on - LINK available, flashing - LINK available and communication

10/100 Mbaud

on - 100 Mbaud, off - 10 Mbaud

ERROR

flashing - DHCP or BootP active. Waiting for an IP address

COM

Communication with controller available

LEDs for PLC diagnostics

LED (Ethernet)

Meaning

PLC

on - PLC running, flashing - cycle time is exceeded, off - cycle time exceeded permanently or PLC stopped

TC/DC

on - TwinCAT configuration active, off - Default configuration active, flashing TwinCAT configuration faulty

Error codes for K-Bus diagnosis

Error
code

Error

argument

Description

Remedy

-

flashing continuously

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. Too many entries in the table for the programmed configuration

2

Unknown data type

Software update required for the Bus Coupler

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 Coupler

Check whether the n+1 Bus Terminal is correctly connected; replace if necessary.

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 Coupler

1

Internal data error

Perform a hardware reset on the Bus Coupler (switch off and on again)

2

DIP switch changed after a software reset

Perform a hardware reset on the Bus Coupler (switch off and on again)

3

IP address already assigned

Check whether the IP address already exists in the network.

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 Coupler again.
Remedy: increase the cycle time

9 

0

Checksum error in Flash program

Transmit program to the BC again

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 Coupler 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 Coupler 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 Coupler again. If the error occurs again, restore the manufacturers setting using the KS2000 configuration software