Code 280-043B: Contradictory plunge type!
Issue Description & Safety Warning
The Heidenhain TNC Series CNC has triggered a critical Contradictory plunge type! 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 plunging strategy defined in Cycles 251 to 254 contradicts the defined plunging angle of the active tool. [Error correction] Change parameter Q366 in one of the Cycles 251 to 254 or the plunging angle ANGLE of the tool in the tool table. Permissible combinations of parameter Q366 and the plunging ANGLE are: For perpendicular plunging: Q366 = 0 and ANGLE = 90 For helical plunging: Q366 = 1 and ANGLE > 0 For inactive tool table, define Q366 with 0 (only perpendicular plunging allowed).
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 280-043B 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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