Fanuc Ot 900 Parameter List Free Jun 2026
Looking for a specific 900 parameter function not listed? Leave your machine model and Fanuc ROM version in the comments below (or consult your local service manual for ROM-specific bit mapping).
FANUC, a renowned Japanese multinational company, has been a pioneer in the field of industrial automation and robotics for decades. One of its most popular and widely used CNC (Computer Numerical Control) systems is the FANUC OT 900. This advanced CNC system is designed to provide high-speed and high-precision machining capabilities, making it an ideal choice for various industries, including aerospace, automotive, and medical devices.
The on the Fanuc 0-T control are "option parameters" that enable or disable specific hardware and software features. Each parameter number (e.g., 900, 901) consists of 8 bits (labeled 0 through 7), where setting a bit to "1" activates a function and "0" deactivates it. Key 900-Series Parameter Bit Definitions
The Fanuc OT 900 parameter list represents a powerful yet dangerous tool. When used correctly, these parameters unlock the full potential of your CNC machine, activating everything from tool life management and graphic displays to custom macro programming and spindle orientation. When used carelessly, they can render an expensive piece of manufacturing equipment completely unusable until proper settings are restored. fanuc ot 900 parameter list
Return to the setting page and change back to PWE = 0 . Press the RESET key to clear the P/S 100 alarm.
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: Some models require a physical switch inside the cabinet or a service password (often "9000") entered on the Diagnostics screen. Looking for a specific 900 parameter function not listed
| Bit | Name | Function | | :--- | :--- | :--- | | 0 | MA2 | (G65 with expressions, DO/WHILE loops) – Highly valuable | | 1 | GRA | Graphic display (tool path simulation on CRT) | | 2 | SPM | Spindle error detection (load meter, speed arrival check) | | 3 | PMV | Program mirror image (for dual turrets) | | 4 | PLF | Polygon turning (G77, G78) | | 5 | PS1 | Punch special codes 1 | | 6 | PS2 | Punch special codes 2 | | 7 | SHP | Shop floor programming (conversational) |
“Diego, find the machine’s original parameter list. It should be in the electrical cabinet door.”
The Fanuc 0T series (0T-A, 0T-B, 0T-C), commonly referred to as the Fanuc 0T or "Fanuc Zero-T," is one of the most reliable and prolific CNC control systems for lathes ever produced. These controls, found on machines from the late 1980s through the 1990s, rely on a specific set of parameters to define machine behavior, axis movement, and special features. One of its most popular and widely used
Colloquially known as the "900 Parameters," or the this list holds the keys to your machine’s capabilities. Unlike standard settings that control axis tuning or I/O configuration, the 900 parameters enable or disable purchased options —features like rigid tapping, macro programming, AI contour control, and additional axes.
Some 900 parameters enable more "Programs Registered" or "Memory Length." Be careful not to exceed the physical RAM installed on your Master Board.
To ensure safe and efficient machining operations, follow these best practices:
FANUC protects these critical parameters behind a parameter write lock. Follow this exact sequence to safely modify them: Step 1: Prepare the Control Turn on the CNC machine. Put the machine into (Manual Data Input). Press the DGNOS/PARAM key to view the settings screen. Step 2: Enable Parameter Write (PWE)
