8449

Wrong User Data

ABB · AC500 Function Block Libraries

What does 8449 mean?

The user-defined program or configuration data stored in the Safety PLC is incorrect, corrupted, or incompatible. This prevents the PLC from executing its intended safety logic or loading its correct parameters, posing a direct risk to machine operation and safety functions. The PLC cannot operate as programmed.

Additional Steps

Steps 1–2 are listed in Priority Fix.

  1. 3

    Download or write the correct and verified user data (program and configuration) to the Safety PLC again.

Source: ABB AC500 Function Block Libraries
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