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Heidenhain Controller
Servo/Axis · Intermediate · 30-120 minutes
HEIDENHAIN 230-001D - Control loop of axis was opened
Alarm 230-001D occurs when the position control loop is intentionally opened during axis optimization procedures or when TNCopt is running. This is typically an informational alarm indicating the servo loop has been disabled for tuning purposes.
230-001D
HEIDENHAIN 230-001D - Control loop of axis was opened
Control loop of axis was opened
The position control loop was deliberately opened, most likely for axis optimization with TNCopt. This is a service mode and not an error condition.
Root Cause Summary
Alarm 230-001D occurs when the position control loop is intentionally opened during axis optimization procedures or when TNCopt is running. This is typically an informational alarm indicating the servo loop has been disabled for tuning purposes.
Safety
- Refer to Heidenhain service manual
- Ensure qualified technician performs repairs
Causes and Fixes
- 1
Check TNCopt status
Access MOD function and verify if TNCopt optimization is currently running in the background.
TNCopt typically runs during machine idle time - check the optimization schedule
- 2
Monitor optimization progress
Navigate to Machine Parameters MP7500-MP7599 range to view current TNCopt status and completion percentage.
Do not interrupt TNCopt process as this can corrupt servo tuning parameters
- 3
Wait for completion
Allow TNCopt to complete its cycle. The alarm will clear automatically when optimization finishes and control loop closes.
Optimization time varies by axis complexity, typically 15-45 minutes per axis
Call a technician if:
- ·Control loop remains open after optimization completion
- ·Servo parameters require modification
- ·Encoder calibration fails repeatedly
Prevention
- Schedule TNCopt during planned maintenance windows
- Monitor servo parameter changes carefully
- Maintain proper encoder cable connections
Common Mistakes
- Interrupting TNCopt optimization process
- Manually closing loop during active calibration
- Modifying servo parameters without understanding consequences
Seeing Multiple Alarms?
Seeing another alarm with this one? Enter the code.
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Always verify with your machine manual or a certified technician before performing service procedures.