Code 160-00B5: Format file defective
Issue Description & Safety Warning
The Heidenhain TNC Series CNC has triggered a critical Format file defective 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 format file for FN16: F-PRINT (DIN/ISO: D16) has the wrong format: The Q parameters and other keywords in the specified lined do not fit to the replacement characters in the format string. Remember: - If an %% character in the format string is not to be understood as format information, you must write \%%. - Each line must begin with all keywords that generate an output (such as HOUR, Q14,...), only then followed by those that do not generate an output (such as M_CLOSE). [Error correction] Correct the format file. [86] 10/2023
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 160-00B5 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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