Code 322-0017: Access to pocket table denied
Issue Description & Safety Warning
The Heidenhain TNC Series CNC has triggered a critical Access to pocket table denied 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] Access to the pocket table is locked by another application. The control could therefore no longer update the pocket table after tool change. The contents of the pocket table might no longer correspond to the tool configuration in the tool memory. [Error correction] Check the contents of the pocket table and correct them if required. Conclude editing of the pocket table, or contact your machine tool builder.
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 322-0017 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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