4643

Address IO output structure

Beckhoff · TwinCAT 2 NC

What does 4643 mean?

The drive lacks a valid I/O output address in the process image. This means the NC system cannot correctly write output data (e.g., control commands, enable signals) to the drive because its process image address is either missing or invalid. This prevents the drive from receiving commands and acting upon them.

Additional Steps

Steps 1–2 are listed in Priority Fix.

  1. 3

    Check for consistency between the hardware's physical I/O and the software's process image mapping.

  2. 4

    Save configuration changes and restart the NC system.

Source: Beckhoff TwinCAT 2 NC
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