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Heidenhain Controller
Communication · Intermediate · 30-120 minutes
HEIDENHAIN 235-007D - PLCE partition has not yet been formatted
HEIDENHAIN alarm 235-007D occurs when the encrypted PLCE (PLC Encrypted) partition on the TNC control's hard drive has not been properly formatted or initialized. This typically happens after a hard drive replacement, system restoration, or when the encrypted partition becomes corrupted and requires reformatting.
235-007D
HEIDENHAIN 235-007D - PLCE partition has not yet been formatted
PLCE partition has not yet been formatted
This TNC7/TNC 640 system error indicates The encrypted PLCE partition has not yet been formatted. The control has detected an abnormal state that requires attention.
Root Cause Summary
HEIDENHAIN alarm 235-007D occurs when the encrypted PLCE (PLC Encrypted) partition on the TNC control's hard drive has not been properly formatted or initialized. This typically happens after a hard drive replacement, system restoration, or when the encrypted partition becomes corrupted and requires reformatting.
Safety
- Refer to Heidenhain service manual
- Ensure qualified technician performs repairs
Causes and Fixes
- 1
Access system administration menu
Press MOD key, select 'System' → 'Configuration' → 'General' → 'System Administration'
Ensure you have administrator privileges before proceeding
- 2
Navigate to partition management
Select 'Storage Management' → 'Partition Management' → 'PLCE Partition'
Document current partition status before making changes
- 3
Initialize PLCE partition
Select 'Format PLCE Partition' and confirm the operation. System will restart automatically after completion.
This operation will erase all existing encrypted PLC data
- 4
Verify partition status
After restart, check partition status shows 'Formatted' and alarm clears from diagnostic buffer
Call a technician if:
- ·Repeated formatting failures
- ·Hardware disk errors detected
- ·Encryption key cannot be regenerated
Prevention
- Perform regular system backups including PLC programs
- Use proper shutdown procedures to prevent file system corruption
- Monitor system event logs for early warning signs
Common Mistakes
- Formatting partition without backing up PLC programs first
- Ignoring disk check results before formatting
- Not verifying encryption key status before partition operations
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Always verify with your machine manual or a certified technician before performing service procedures.