Code 126-0110: NC software not released for FS applications
Issue Description & Safety Warning
The Heidenhain TNC Series CNC has triggered a critical NC software not released for FS applications 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 control system (hardware) was detected as a system with functional safety (FS) from HEIDENHAIN. However, the installed NC software has not been approved for applications that use integrated functional safety (FS) from - The installed software is a test software or an NC software that has not been released for the application of integrated functional safety (FS) [Error correction] - Install an NC software version of your control that has been approved for applications with integrated functional safety (FS) from HEIDENHAIN. - Inform your service agency.
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 126-0110 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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