Code 235-009F: Hardware setup does not match configuration
Issue Description & Safety Warning
The Heidenhain TNC Series CNC has triggered a critical Hardware setup does not match configuration 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 hardware expansion in the HSCI chain does not match the configuration. The deviation is so large that the control cannot provided relevant information. Configuration [Device type (name)]: %1 Hardware [Device type (HSCI address, serial number)]: %2 Possible causes: - Incorrect IOCP file loaded - Option for configuring the hardware expansion was set incorrectly [Error correction] - Check the IOCP file - Check configuration and the options in effect - Check cabling of the HSCI chain You can use the diagnostics functions of the control for this.
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 235-009F 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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