Fanuc Ot 900 Parameter List [ 95% POPULAR ]

Editing these parameters is a high-risk operation. Improper changes can lead to system instability or hardware crashes.

| Parameter | Bit(s) | Commonly Associated Function | | :--- | :--- | :--- | | | #5 | Inch/Metric Conversion (1 = Metric, 0 = Inch) | | | #4 | Spindle Analog/Serial Output | | | #3 | Manual Pulse Generator (Handwheel) Enable (1 = Enabled) | | 901 | #7 | Multiple Repetitive Cycles (G70-G76) Enable | | | #5 | Chamfering/Corner R Enable (1 = Enabled) | | 902 | #6 | Custom Macro A (1 = Enabled) | | | #5 | Leadscrew Pitch Error Compensation (1 = Enabled) | | | #2 | Constant Surface Speed Control (1 = Enabled) | | 903 | #7 | Background Editing (1 = Enabled) | | | #3 | Direct Input of Offset Measurement B | | 904 | #2 | Chinese Language Display | | 906 | #7 | External Tool Compensation | | | #6 | Automatic Tool Compensation | | 907 | #6 | Tool Nose Radius Compensation (1 = Enabled) | | | #4 | Machining Time / Parts Count Display | | 909 | #1 | External Message Display | | | #0 | Graphic Display (1 = Enabled) | | 911 | #3 | Time Function (Clock) | | 932 | #7 | MDI-B Operation Panel | | | #6 | Constant Surface Speed | | | #3 | Custom Macro B (1 = Enabled, mutually exclusive with Macro A) | | 934 | #4 | Special G-Code Input (e.g., G05, G08) | | 935 | #2 | Multiple Repetitive Cycles for Machining |

Navigate to the 900s, input the new binary value, and press INPUT . Detailed Fanuc 0-T 900 Parameter List (Common Options)

| Bit | Function | |------|-----------| | 7 | Spindle orientation function (M19) available | | 6 | Orientation stop position setting (by parameter vs. auto) | | 5 | High-speed orientation response | | 4 | Encoder type: 0 = separate encoder, 1 = built-in motor encoder | | 3-0 | Orientation deceleration constant | fanuc ot 900 parameter list

PARAMETER NO. 901 901 0 0 1 0 1 0 0 0 │ │ │ │ │ │ │ └─ Bit 0 │ │ │ │ │ │ └─── Bit 1 │ │ │ │ │ └───── Bit 2 │ │ │ │ └─────── Bit 3 │ │ │ └───────── Bit 4 │ │ └─────────── Bit 5 │ └───────────── Bit 6 └─────────────── Bit 7 Use code with caution.

Never change the 900 parameters arbitrarily. If you enter an invalid combination, the control may display "ROM PARITY ERROR" or fail to boot.

The you are trying to activate?

Activates the C-axis control function for live tooling.

The second category, and the focus of this article, is the (also known as "confidential parameters" or "secret parameters"). Fanuc historically treated these parameters as proprietary information, intentionally withholding their documentation from public manuals. These 8‑bit parameters function as software switches that enable or disable specific CNC features—from basic functions like metric/inch conversion to advanced capabilities like custom macro programming.

Example:

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| Bit | Name | Function | | :--- | :--- | :--- | | 0 | RMT | Remote buffer (high-speed DNC via RS-232) | | 1 | IPR | Index table control (for sub-spindle or turret indexing) | | 2 | MUL | Multiple PLC control | | 3 | DRL | Drill cycle customizations | | 4 | S4D | 4-speed spindle control | | 5 | AI | AI advanced preview (high precision) | | 6 | PRO2 | Program protect (key-lock override) | | 7 | ATB | Automatic tool compensation (G36/G37) |

Setting a 900 bit to 1 enables the software recognition of a feature, but the machine must also have the corresponding hardware installed (e.g., a fourth‑axis drive or spindle encoder). If you enable a feature that lacks the necessary hardware, the control may generate alarms or fail to boot properly. Editing these parameters is a high-risk operation