Diagnostic LEDs

The Bus Coupler has two groups of LEDs for the display of status. The "DIAG LEDs" on the left indicate the fieldbus, PLC and K-Bus state. Two green LEDs (Power LEDs) are located in the top right corner of the Bus Coupler. They are used for displaying the supply voltage of the BX Controller and the 24 VDC supply of the power contacts.

LEDs for power supply diagnostics

LED (Power LEDs)

Meaning

Left LED off

Bus Coupler has no voltage 24 VDC

Right LED off

No power supply 24 VDC connected at the power contacts

Diagnostic LEDs 1:
Diagnostic LEDs for the PLC, the K-bus and the power supply.

The DIAG LEDs are sub-divided as follows:

The LEDs can be off, green, orange or red.

Diagnostic LEDs 2:
Diagnostic LEDs for the PLC and the K-bus.

After switching on, the Bus Coupler immediately checks the connected configuration. The I/O LED goes out if the start-up was successful. A red I/O LED indicates a Bus Terminal error. The error type is shown in the display. This permits rapid rectification of the error.

LED bus - fieldbus diagnostics

No meaning in the case of the BX8000, since no fieldbus interface exists. The LED can be operated from the PLC by ADS.

LED PLC - PLC diagnostics

LED

Meaning

LED off

PLC stop or no program available

LED red

Flashing - the set task time is exceeded from time to time
On - the set task time is always exceeded
Disable the red LED

LED orange

PLC running without boot project (only during the on cycle), LED flashes orange during creating of the boot project

LED green

Boot project - PLC running (only during the on cycle)

LED I/O - K-Bus diagnostics

LED

Meaning

LED off

No data are exchanged via the K-bus

LED red

error flashing - error type - display

LED orange

Register or KS2000 online access

LED green

K-bus OK and running

Error code for K-bus 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. 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)

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 BX 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