Heidenhain codes
HeidenhainParameterIntermediate30-120 minutes

230-01AE

HEIDENHAIN 230-01AE - Hardware description for axis has changed Position might not be valid

Hardware description for axis has changed Position might not be valid

Hardware-description parameters for this axis have been modified since positions were last saved. Stored reference positions may no longer be valid.

Root Cause Summary

Alarm 230-01AE occurs when hardware configuration parameters for an axis have been modified in the TNC control, invalidating previously saved position data. This typically happens after encoder parameter changes, axis configuration modifications, or hardware replacements that alter the axis scaling or reference system.

Safety

  • Refer to Heidenhain service manual
  • Ensure qualified technician performs repairs

Causes and Fixes

  1. 1

    Access Machine Parameters

    Press MOD key, select 'Machine Parameters' menu, navigate to axis-specific encoder parameters (typically MP1000-1099 series for axis configurations).

    Always document original parameter values before making changes

  2. 2

    Verify Encoder Configuration

    Check MP1003 (encoder type), MP1006 (encoder resolution), and MP1008 (reference mark evaluation) for the affected axis against machine documentation.

    Incorrect encoder parameters can cause position errors or axis runaway

  3. 3

    Perform Reference Run

    Execute manual reference run for the affected axis using the REF key or automatic reference cycle to re-establish valid position data.

    Clear alarm first, then perform reference run in manual mode for safety

  4. 4

    Validate Position Accuracy

    Use position display (POS key) to verify axis positions match physical machine position after reference run completion.

DIY Feasiblehigh confidence

Call a technician if:

  • ·Parameter changes don't resolve alarm
  • ·Axis exhibits erratic movement after parameter correction
  • ·Multiple axes affected simultaneously
  • ·Hardware replacement required

Prevention

  • Always backup parameters before making changes
  • Document all hardware modifications with parameter updates
  • Perform regular parameter backup to external storage
  • Verify parameter compatibility before restoration

Common Mistakes

  • Ignoring the need for reference run after parameter changes
  • Restoring complete parameter sets without verification
  • Changing multiple parameters simultaneously without testing
  • Not documenting original parameter values before modifications

Seeing Multiple Alarms?

Seeing another alarm with this one? Enter the code.

Get machine-aware diagnosis

AxisMD logs alarms against your actual machines, tracks patterns, and gives AI context your manual doesn't have.

Start free

Was this guide helpful?

Always verify with your machine manual or a certified technician before performing service procedures.