Before changing a single bit, perform an SRAM backup via the FANUC boot screen or output all parameters ( ALL.PRM ) to a USB drive or memory card.
If the CNC rejects the write (alarm: PS0420), the parameter is locked by an S3C or S3U key (physical or software lock). You cannot bypass this legally.
Used on complex multi-axis machines or turn-mills where selecting a tool requires background math, geometry adjustments, or specific sub-spindle logic. fanuc 9000 parameters list
G-code macro call. Maps custom G-codes (like G150 ) to programs O9010 through O9019 .
This guide applies generally to FANUC 0i, 16i, 18i, 21i, and 31i models, but individual machine builders (OEMs) may vary their implementations. What Are FANUC 9000 Parameters? Before changing a single bit, perform an SRAM
| Hazard | Potential Consequence | |---|---| | | The machine could crash into hard stops, causing broken ballscrews and spindle damage | | Modifying axis count or orientation (e.g., 9900) | The machine may lock up and refuse to move, or move in the wrong direction | | Deleting or corrupting O9000‑series programs | The automatic tool changer will stop working immediately, halting production | | Turning off stored pitch error compensation (e.g., 9922.5) | All axis movements will lose their calibrated accuracy, leading to out‑of‑tolerance parts | | Making unauthorized changes | FANUC may void your warranty and charge significant fees for restoration | | Modifying parameters without a backup | If the control loses memory (e.g., dead battery), the machine may never run again without complete restoration from a backup |
That said, "9000 parameters" is an umbrella term that can be applied to two very different, yet equally critical, parts of a FANUC CNC system. This article cuts through the confusion to provide a thorough and practical guide to both: Used on complex multi-axis machines or turn-mills where
Note: On older controls like the FANUC 0M or 10M, parameter lock mechanisms may reside directly within the 9000 series itself (e.g., parameter 9000 or 9001 bit settings), or require a physical toggle switch on the main circuit board. Core FANUC 9000 Parameter Reference List
The 9000-series programs (macros) are the "brain" of your tool changer and probing system. If you unlock them (via Parameter 3202) and accidentally delete a line of code, your machine may stop tool changing entirely. Always output a SRAM backup or a "Punch" of all parameters to a USB or CF card first. Summary Table for Quick Reference Typical Use Case 3202.4 (NE9) Lock/Unlock O9000-O9999 Editing Tool Change or Probing macros. 3202.0 (NE8) Lock/Unlock O8000-O8999 Editing user-defined sub-programs. 6050–6059 G-Code Call Assigning a custom G-code to a 9000 macro. 6071–6079 M-Code Call Assigning a custom M-code to a 9000 macro. Program Display Controlling if 9000 programs appear in the DIR list.