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Heidenhain Controller
Servo/Axis · Intermediate · 30-120 minutes
HEIDENHAIN 2A0-0016 - Caution: Prepos. height defined!
Alarm 2A0-0016 occurs when a point in the TNC's point table has been hidden or disabled while still having an active pre-positioning height (PREPOS) value defined. This creates a potential collision risk as the control cannot properly execute the pre-positioning movement to the hidden point.
2A0-0016
HEIDENHAIN 2A0-0016 - Caution: Prepos. height defined!
Caution: Prepos. height defined!
A point with pre-positioning height has been hidden or disabled. This may cause collision risk during subsequent moves.
Root Cause Summary
Alarm 2A0-0016 occurs when a point in the TNC's point table has been hidden or disabled while still having an active pre-positioning height (PREPOS) value defined. This creates a potential collision risk as the control cannot properly execute the pre-positioning movement to the hidden point.
Safety
- Refer to Heidenhain service manual
- Ensure qualified technician performs repairs
Causes and Fixes
- 1
Access point table management
Press TOOL key, then select 'Point Table' from the TNC menu structure.
Use softkey 'SHOW ALL' to display hidden points temporarily
- 2
Identify hidden points with PREPOS
Scroll through point table and look for points with status 'H' (hidden) that have values in the PREPOS column.
Do not unhide points without verifying tool clearance paths
- 3
Clear PREPOS value or unhide point
Either delete the PREPOS height value for the hidden point or change point status from 'H' to active if point is still needed.
Document original PREPOS values before clearing in case restoration is needed
Call a technician if:
- ·Machine parameter access restricted
- ·Point table corruption suspected
- ·Alarm persists after all corrections
Prevention
- Always clear PREPOS values before hiding points
- Use point table validation before program execution
- Maintain consistent point table documentation
Common Mistakes
- Hiding points without clearing PREPOS values
- Ignoring point table status indicators
- Not refreshing point table after program edits
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