28691

F-device CRC1-Fault (V3 CPU)

ABB · PB610 Panel Builder 600 Programming Software

What does 28691 mean?

A CRC1-Fault has occurred in F-device instance <n> for AC500 V3 non-safety CPU PM56xx. This indicates a data integrity error during PROFIsafe communication, suggesting corruption of safety-critical data telegrams.

Repair Steps

  1. 1

    Check the Safety PLC configuration for the F-device instance <n>.

  2. 2

    Restart the Safety PLC module.

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Verified technical data. Last updated: March 2026
Source: ABB PB610 Panel Builder 600 Programming Software
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