Code 280-0450: Plunging type is not possible
Issue Description & Safety Warning
The Heidenhain TNC Series CNC has triggered a critical Plunging type is not possible 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] In one of the cycles 251 to 254 you defined a plunging strategy that is not possible with the dimensions defined in the cycle. [Error correction] Use a smaller tool or another plunging strategy. Set the configuration datum suppressPlungeErr to "on" in order to suppress this monitoring, or use RCUTS in the tool table. Use a tool with a sufficiently large cutting width and define this width in the RCUTS column of the tool table.
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 280-0450 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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