Code 160-0125: Demo version
Issue Description & Safety Warning
The Heidenhain TNC Series CNC has triggered a critical Demo version 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] This software is a demo version. With the demo version you can edit and run NC programs with a maximum length of 100 lines. With the demo version you are not entitled to service support from HEIDENHAIN. [Error correction] - If you would like to purchase the licensed version of the product, please contact the service agency for the control. - Check whether the keyboard of the programming station (or the dongle) is connected.
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 160-0125 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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