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ErrorLib — Industrial Fault Code Library

Disclaimer: ErrorLib is an independent technical reference tool. While we aim for accuracy, always verify with the manufacturer’s official service manuals before performing maintenance on industrial equipment. ErrorLib is not affiliated with the brands listed.

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.

Common Causes

  • Cyclic Redundancy Check (CRC) error detected during F-device data transmission (CRC1).
  • Data corruption during PROFIsafe communication.
  • Faulty communication hardware or cable integrity issue.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

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

  2. 2

    Restart the Safety PLC module.

Browse all codes in this manual (58)
Verified technical data. Last updated: April 2026

Related Faults

1Safety Destination Address Not Valid (V2 CPU)10Parameter F_SIL Exceeds Specific Application SIL (V2 CPU)11Safety Watchdog Time Zero (V2 CPU)
Source: ABB PB610 Panel Builder 600 Programming Software
Open Manual (Page 459)Search more codes in this manual