Error Handling And Diagnosis; Diagnostic Leds; Fig. 23 Leds Of Bus Couplers Bk9053 And Bk9103 - Beckhoff BK9053 Documentation

Error handling and diagnosis

7 Error handling and diagnosis
7.1

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.
Fig. 23: LEDs of Bus Couplers BK9053 and BK9103
LEDs for power supply diagnostics
LED Meaning
LED Us off
on
LED Up off
on
LEDs at RJ45
LED Meaning
LED Link/Act off
on
flashing
LED 10/100 Mbaud off
(only BK9103)
on
40
the power supply voltage, Us, is not present
the power supply voltage, Us, is present
Supply voltage Up (for power contacts) not available
Supply voltage Up (for power contacts) available
No physical connection present
Physical connection present
Communication available
10 Mbaud (if LED Link/Act is lit or flashes)
100 Mbaud
Version: 2.3.0 BK9053, BK9103