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Heidenhain Controller
Parameter · Intermediate · 30-120 minutes
HEIDENHAIN 230-01A0 - Axis index on CC too large
HEIDENHAIN alarm 230-01A0 occurs when the selEncoderIn parameter references an axis index that exceeds the number of axes physically configured on the CC (Compact Controller). This typically happens after hardware changes or incorrect parameter configuration during system setup.
230-01A0
HEIDENHAIN 230-01A0 - Axis index on CC too large
Axis index on CC too large
The axis index assigned by selEncoderIn points to a CC that has fewer axes than the configuration claims. The encoder input is out of range for the chosen controller.
Root Cause Summary
HEIDENHAIN alarm 230-01A0 occurs when the selEncoderIn parameter references an axis index that exceeds the number of axes physically configured on the CC (Compact Controller). This typically happens after hardware changes or incorrect parameter configuration during system setup.
Safety
- Refer to Heidenhain service manual
- Ensure qualified technician performs repairs
Causes and Fixes
- 1
Access CC configuration parameters
Navigate to MOD > Configuration > Machine Parameters > CC Parameters and locate the selEncoderIn parameter settings.
Document current parameter values before making changes
- 2
Verify axis count on CC module
Check the physical CC module specifications and count the actual number of axis connections available on the hardware.
Ensure machine is in safe state before accessing hardware
- 3
Correct selEncoderIn parameter
Modify the selEncoderIn parameter to reference only valid axis indices (typically 0-based counting, so for 3 axes use 0,1,2).
Cross-reference with MP7500 series parameters for axis assignment
- 4
Restart CC module
Perform a controlled restart of the CC module through MOD > Reset > CC Reset to apply parameter changes.
Call a technician if:
- ·Parameter corruption persists after default reload
- ·Hardware replacement required
- ·Firmware downgrade needed
Prevention
- Always backup parameters before hardware changes
- Verify CC module specifications before replacement
- Document encoder-to-axis mapping for future reference
- Implement regular parameter backup schedule
Common Mistakes
- Assuming axis indexing starts at 1 instead of 0
- Not checking CC module axis count after replacement
- Modifying selEncoderIn without understanding hardware limits
- Forgetting to restart CC module after parameter changes
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