77

Transmission Error: Data Inconsistent (CRC2 error) (V2 CPU)

ABB · PB610 Panel Builder 600 Programming Software

What does 77 mean?

A transmission error indicating inconsistent data due to a CRC2 error has occurred in an AC500 V2 non-safety CPU PM5xx system. This signifies a loss of data integrity during PROFIsafe communication.

Repair Steps

  1. 1

    Check communication lines for physical damage or interference.

  2. 2

    Review the PROFIsafe configuration for consistency.

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