Code 140-0060: Unit of measure “%1” not defined
Issue Description & Safety Warning
The Heidenhain TNC Series CNC has triggered a critical Unit of measure “%1” not defined 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] - Unknown unit of measure given in the attribute information. [Error correction] - Check the unit for mass and change it if necessary. Use only the default units of math. Only the measuring unit’s name can be entered, not the measuring unit itself. - Note that, depending on the unit of measure, the displayed value is converted to the unit of measure used by the control. - With machine parameters CfgOemInt and CfgOemPosition, no units of measure can be used that require conversion.
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 140-0060 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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