235-007E

Access PLC password dialog

Navigate to MOD function → Software → PLC → Password and verify the current password entry field is displayed.

Password is case-sensitive and may include special characters

Re-enter correct password

Clear the current password field and carefully re-enter the correct PLCE partition password, ensuring proper case and character entry.

Multiple incorrect attempts may lock the partition temporarily

Restart PLC system

Execute PLC STOP followed by PLC START from the PLC operating mode to reinitialize the encrypted partition access.

Monitor machine status display for successful partition integration

Check partition status

Navigate to MOD function → System → Storage → Partition Info and verify PLCE partition shows as 'Formatted' and 'Encrypted' status.

Unformatted partitions will show 'Not Ready' status

Format PLCE partition

Access MOD function → System → Storage → Format and select PLCE partition, then choose 'Format with Encryption' option.

Formatting will erase all existing data on the partition

Set new encryption password

Enter a new encryption password when prompted during formatting process, ensuring it meets TNC security requirements (minimum 8 characters).

Document the password securely for future reference

Verify partition integration

Restart the control and confirm PLCE partition appears in file manager under PLC directory structure without alarm.

Check PLC status in operating mode for successful integration

Run partition diagnostics

Execute MOD function → Diagnosis → Storage → Check Partition and select PLCE partition to scan for file system errors.

Look for 'Encryption Header Error' or 'File System Corrupt' messages

Attempt partition repair

If diagnostics show repairable errors, select 'Repair Partition' option and allow the TNC to attempt automatic correction.

Repair process may result in data loss if corruption is severe

Restore from backup

If repair fails, restore PLCE partition from most recent backup using MOD function → Data → Backup → Restore → Select PLCE backup file.

Always maintain regular encrypted partition backups

Check software version compatibility

Navigate to MOD function → System → Version and compare current TNC software version with the version used to create the PLCE partition.

Check release notes for encryption compatibility changes

Update partition format

Access MOD function → System → Storage → Convert Partition and select PLCE partition for format conversion to current software version.

Create backup before conversion process

Re-enter encryption credentials

After conversion, re-enter the original encryption password when prompted to complete the partition integration process.

Conversion may take several minutes depending on partition size

Check storage device health

Execute MOD function → Diagnosis → Hardware → Storage Device and review health status and error counters for the storage device.

High error counts indicate imminent device failure

Backup critical data immediately

If device shows errors, immediately backup all accessible data using MOD function → Data → Backup → Complete System Backup.

Use external storage device for backup to avoid further stress on failing drive

Replace storage device

Contact Heidenhain service for storage device replacement and system restoration from backup files.

Only qualified technicians should replace internal storage devices