210-001C

Access file management

Press MOD key, select 'File management' and navigate to the problematic system file location.

Check file size - corrupted files often show unusual byte counts

Verify backup source

Compare original backup file on external media with transferred file using 'File info' function in TNC file manager.

Do not overwrite working system files without verified backup

Re-transfer system file

Delete corrupted file and re-transfer from known good backup source, ensuring proper file extension (.SYS) is maintained.

Use TNC's built-in checksum verification when available

Restart control system

Perform controlled restart via MOD > System > Restart to reload system files and clear alarm condition.

Check network connection

Verify Ethernet cable integrity and connection status in MOD > System > Network configuration menu.

Look for intermittent connection indicators in network status display

Verify DNC settings

Check DNC parameters in MOD > DNC > Configuration, particularly baud rate, data bits, and protocol settings match host system.

Incorrect protocol settings can cause silent data corruption

Test communication

Perform test file transfer of small known file to verify communication integrity before transferring critical data.

Use TNC's communication log to identify specific transmission errors

Reset communication interface

Restart DNC interface through MOD > System > Interface reset to clear any buffered corrupted data.

Check storage device

Remove and inspect CF card/USB device for physical damage, then test on external PC for file system errors.

Use Windows CHKDSK or similar utility to scan for bad sectors

Verify file integrity

Compare file checksums between storage device and known good copies using PC-based verification tools.

Corrupted storage can damage files during write operations

Format storage device

Perform full format (not quick format) of storage device using FAT32 file system compatible with TNC control.

Use TNC's built-in format function when possible for optimal compatibility

Restore files from backup

Copy verified system files back to formatted storage device and test file access through TNC file manager.

Access machine parameters

Press MOD key, enter machine parameter mode, and navigate to MP table to identify corrupted parameter entries.

Look for parameters showing unusual values or format errors

Compare with backup MP table

Load known good MP backup file and compare critical parameters, particularly communication and system-related MPs.

Incorrect MP values can cause machine malfunction or damage

Restore affected parameters

Manually correct corrupted MP values or restore entire MP table from verified backup source.

Document changes for future reference and validation

Validate parameter integrity

Save MP table and restart control to verify parameter acceptance and alarm clearance.

Perform memory diagnostic

Access MOD > System > Diagnostics > Memory test to check internal memory integrity and identify failing sectors.

Memory diagnostics may take significant time and require system downtime

Backup critical data

Immediately backup all programs, parameters, and system files to external storage before memory degradation worsens.

Use multiple backup methods and verify data integrity on external systems

Perform system recovery

Execute TNC system recovery procedure from MOD > System > Recovery menu using factory defaults and restored backups.

System recovery will erase all current data - ensure backups are complete

Contact Heidenhain service

If memory errors persist after recovery, contact authorized Heidenhain service for hardware replacement evaluation.