Code 320-0017: Configuration and PLC program incompatible
Issue Description & Safety Warning
The Heidenhain TNC Series CNC has triggered a critical Configuration and PLC program incompatible 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] A PLC program has been selected that is not compatible with the configuration of the machine. Necessary prerequisites for the successful operation of the PLC program: - PLC programs that operate with the numerical memory interface API 1.0 (TNC flag interface) can only control one operating mode group, one NC channel, and one spindle. - PLC programs that use the symbolic memory interface API 3 must create the API data structures in the number suitable for the configuration. - The correct values for the system parameters AXIS_COUNT and SPINDLE_COUNT must be defined in the configuration file of the PLC compiler. - PLC programs must define a sufficiently large memory image. All permanently assigned, non-volatile, or absolutely addressed flags must fall within the memory image. - PLC programs have to define all markers to which configuration data are to be assigned at the start of the PLC program. - Pay attention to any other, previously issued warnings. [Error correction] - Check the machine configuration - Check the configuration file of the PLC compiler for correct values - Use a suitable PLC program - Inform your service agency
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 320-0017 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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