231-A097

Drive lock on spindle, SS2 reaction active

Heidenhain · TNC CNC Controllers

What does 231-A097 mean?

This error indicates that a spindle drive was locked. This occurs when an attempt was made to switch on a spindle drive while the guard door was open, AND a Stop 2 (SS2) reaction was active for the spindle, or due to an internal software error.

Common Causes

  • Attempt to switch on a spindle drive while the guard door was open and a Stop 2 (SS2) reaction was active for the spindle.
  • Safety function SS2 is still active or in an abnormal state for the spindle.
  • Internal software error.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Ensure the guard door is closed before attempting to switch on the spindle drive.

  2. 2

    Verify that the Stop 2 (SS2) reaction for the spindle has fully completed and reset before attempting to enable the drive.

  3. 3

    Check the software version of the controller and update it if a known issue related to SS2 management exists.

  4. 4

    Review the safety program logic to ensure proper handling of spindle drive enable requests during and after an SS2 condition.

Browse all codes in this manual (47)
Verified technical data. Last updated: March 2026

Related Faults

Source: Heidenhain TNC CNC Controllers