PW0017

INEXECUTION OF SAFETY FUNCTIONS

Fanuc · Alpha i Series Servo Amplifier

What does PW0017 mean?

The CNC detected an abnormal condition in the execution of CNC safety functions. This indicates that critical safety routines within the CNC software are not functioning as expected, creating an unsafe operating environment. A power cycle is required.

Common Causes

  • Abnormal execution flow or delay in CNC safety function subroutines.
  • Internal CNC logic error affecting safety function monitoring.
  • Interference from other CNC processes impacting safety function timing.
  • Faulty sensor input critical to safety function execution.
  • Corruption of safety function firmware or data.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Review CNC logs for recent program changes or specific G-code commands.

  2. 2

    Perform a CNC system reset to clear temporary states.

  3. 3

    Test critical safety input signals (e.g., emergency stop button) for proper function.

  4. 4

    Verify CNC parameters related to safety function timeouts (e.g., P1-23).

  5. 5

    Ensure CNC firmware is up-to-date and uncorrupted.

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Verified technical data. Last updated: March 2026

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Source: Fanuc Alpha i Series Servo Amplifier