What is a computer bus error

K-bus interruption

  1. BK3xx0 - Bus Coupler for PROFIBUS-DP
  2. Diagnosis and troubleshooting
  3. K-bus diagnosis
  4. K-bus interruption

In the event of an interruption or longer malfunction of the K-bus, the coupler goes into the state K-bus error. Depending on the setting Response to K-bus errors in the UserPrmData, the coupler leaves the DP data exchange and sets the Stat_Diag bit in the diagnostic data when the DP boots up again (which means that no DP data exchange is carried out), sets the DP inputs to 0 or leaves the DP -Inputs unchanged.

byte

bit

value

description

10

2-3

00am

Reaction to K-bus error: DP data exchange is exited (default)

01am

Reaction to K-bus error: DP inputs become 0

10am

Reaction to K-bus error: DP inputs remain unchanged

When the interruption or malfunction of the K-bus has been eliminated, the setting is decisive Behavior in the event of a K-bus error in the UserPrmData about whether the state K-bus error exited manually (via K-bus reset) or automatically:

byte

bit

value

description

7

0

0am

Behavior in the event of a K-bus error: manual K-bus reset (default)

1am

Behavior in the event of a K-bus error: automatic K-bus reset

Reporting the K-bus error

A K-Bus error will appear on both the LED I / O ERR as well as in the DPV1 status message of the DP diagnostic data (bytes 11-13).

byte

bit

description

11

0

too many K-bus command errors

11

1

too many K-bus timeouts

11

2

too many K-bus reception errors

11

3

too many K-bus send errors

11

4

K-bus reset error

11

5

general K-bus error

12

0-7

K-bus error code

13

0-7

K-bus error argument

K-bus reset

A K-bus reset can be carried out manually with DPV1-Write:

Slot number

index

byte

Value

0

99

0

2

1

1

2

0

3

0

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