Code 270-0041: Data record %1 is protected by password
Issue Description & Safety Warning
The Heidenhain TNC Series CNC has triggered a critical Data record %1 is protected by password alarm. Immediate attention from a qualified operator or maintenance technician is required to prevent secondary damage to the equipment or spoiled parts during the manufacturing cycle. Always ensure standard safety and LOTO procedures are followed before accessing electrical cabinets.
Official Troubleshooting Steps
[Cause of error] You tried to delete, edit or cancel the password protection of a table's password-protected data record. [Error correction] - To change the data record, reenter the password in the password column or cancel the password protection. - Cancel the password protection before deleting the data record. - To cancel the password protection, enter the exclamation mark character "!" in the password column and immediately enter the password.
Source: HEIDENHAIN NC Error Messages — TNC7/640/620/320/128, CNC PILOT 640, MANUALplus 620 (10/2023)
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Heidenhain TNC Series CNC Alarms
Heidenhain controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code 270-0041 on the TNC Series CNC identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Heidenhain's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.
Complete Alarm List: 4497 Heidenhain TNC Series CNC codes.
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