Code 280-04BF: Status of transformations for simultaneous turning is not
Issue Description & Safety Warning
The Heidenhain TNC Series CNC has triggered a critical Status of transformations for simultaneous turning is not 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
correct [Cause of error] The status of the transformations is not correct for the requested simultaneous turning operation with a FreeTurn tool. TCPM must be activated before the cycle can run. Before the cycle was run, a transformation was activated that is not possible with this type of operating mode. [Error correction] Activate TCPM before calling the cycle. Check your corrections in the WPL-CS, such as: FUNCTION CORRDATA WPL.
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 280-04BF 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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