Code 280-05DD: Error in pocket table
Issue Description & Safety Warning
The Heidenhain TNC Series CNC has triggered a critical Error in pocket table 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] Error in pocket table: - Pockets or tools appear twice. - There is no value in column T for the spindle pocket. - The tool in the spindle is not in the tool table. - The TOOL_P symbol does not point to a pocket table or it is not set. - The pocket table is write-protected or it does not exist. [Error correction] - Correct the pocket table. - There is no value in column T for the spindle pocket. - The tool in the spindle is not in the tool table. - The TOOL_P symbol does not point to a pocket table or it is not set. - The pocket table is write-protected or it does not exist.
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 280-05DD 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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