Code 235-007E: Encryption password for PLCE partition incorrect
Issue Description & Safety Warning
The Heidenhain TNC Series CNC has triggered a critical Encryption password for PLCE partition incorrect 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] The PLCE partition could not be integrated because the encryption password is incorrect or the partition is not yet formatted. [Error correction] - Start the PLCE setup dialog. - Enter the correct encryption password. - Include the partition. or - Enter a new encryption password. - Format the PLCE partition. - Include the partition.
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 235-007E 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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