Code 236-A006: ProfiNet: Error during assignment of drives
Issue Description & Safety Warning
The Heidenhain TNC Series CNC has triggered a critical ProfiNet: Error during assignment of drives 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 TNC cannot assign an axis to a drive connected over ProfiNet. Possible causes: - The configuration data under ProfiNet/ParameterSets are incorrect. - There is a fault in a drive. [Error correction] Remove the cause of error and acknowledge the error message
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 236-A006 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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