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Heidenhain Controller
Parameter · Intermediate · 30-120 minutes
HEIDENHAIN 230-01AE - Hardware description for axis has changed Position might not be valid
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.
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
Causes and Fixes
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
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
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
Validate Position Accuracy
Use position display (POS key) to verify axis positions match physical machine position after reference run completion.
Call a technician if:
Prevention
Common Mistakes
Seeing Multiple Alarms?
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Always verify with your machine manual or a certified technician before performing service procedures.