Code 230-0473: Fast input cannot be activated
Issue Description & Safety Warning
The Heidenhain TNC Series CNC has triggered a critical Fast input cannot be activated 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 fast input cannot be activated because the IO configuration does not match the actual hardware configuration. The affected input is shown in the additional information. - The control is operated in the simulation mode. - The IOC file does not match the hardware configuration. - The options in the configuration are incorrectly set. [Error correction] - Check the hardware configuration - Check the IO configuration - Check the options - 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 230-0473 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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