Code 140-000B: Unknown code word '%1' in cycle ini file.
Issue Description & Safety Warning
The Heidenhain TNC Series CNC has triggered a critical Unknown code word '%1' in cycle ini file. 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] An unknown keyword was found in a cycle file. - Incorrect cycle file - Incorrect version of CycleDesign - Incomplete or incorrect cycle definition [Error correction] - Use the correct cycle file. - Use the correct version of CycleDesign. - Use CycleDesign to correct the cycle definition.
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 140-000B 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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