6 pulses (arg 0)

K-bus Initialization Error

Beckhoff · CX2100-0914 Embedded PC

What does 6 pulses (arg 0) mean?

The K-bus ERR LED flashes 6 times, with '0' in the argument sequence, indicating a general error during the initialization process of the K-bus. This suggests an internal issue with the Embedded PC responsible for K-bus communication.

Common Causes

  • K-bus initialization sequence failed.
  • Bus terminals not detected or responding during startup.
  • Incorrect K-bus configuration preventing initialization.
  • Hardware fault in the K-bus controller.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Replace the Embedded PC, as the error points to a fault in its K-bus initialization hardware or firmware.

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Verified technical data. Last updated: March 2026

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Source: Beckhoff CX2100-0914 Embedded PC