In the Fanuc 0-T (OT) control series, the 900 series parameters (900–999) are classified as "option parameters". These bit-level settings enable or disable major software features, memory expansions, and machine interface capabilities. Critical Access and Safety
Before modifying any 900-series parameters, you must enable Parameter Write Enable (PWE). Step 1: Enter MDI Mode on the control. Step 2: Press the SETTING function key.
Step 3: Set PWE = 1. The control will typically trigger a "P/S 100" alarm, which is normal during editing.
Step 4: Navigate to the SYSTEM page and press the PARAM soft key.
Warning: Modifying option parameters without proper backup or factory authorization can disable critical machine functions or cause system instability. Always record your current values before making changes. Fanuc 0-T 900-Series Parameter List
Each parameter consists of 8 bits (labeled 7 to 0 from left to right).
Below are key 900-series options (bits 0–7) for the Fanuc 0-T control, enabling essential functions: Fanuc Ot 900 Parameter List - Google Groups
The 900 series parameters 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
Below is a breakdown of common 900-series options for the Fanuc 0-T system: Parameter 900 Bit 0: Canned Cycles (G-codes like G73, G81) Bit 1: G10 (Programmable Data Input) Bit 5: Inch/Metric Conversion Parameter 901 Bit 0-4: Tape Memory Additions (ranges from 20M to 320M) Bit 5: Chamfering and Corner Radius Bit 7: Multiple Repetitive Canned Cycles (G70-G76) Parameter 902 Bit 2: Constant Surface Speed Control (G96/G97) Bit 5: Stored Pitch Error Compensation Bit 6: Custom Macro A Parameter 903 Bit 4: MDI Execution B Bit 5: Number of Programs (Set to 125) Bit 7: Soft Keys below CRT display Parameter 910/911 910 Bit 1: Work Offsets (G54-G59) 911 Bit 2: Rigid Tapping 911 Bit 3: Clock and Part Counters display How to Access and Edit
Because these parameters are critical to machine functionality, they are typically protected. Fanuc O-T Parameter List Overview | PDF - Scribd
The Fanuc 0-T "900" parameters are option parameters used to enable or disable specific software features and hardware upgrades on the CNC controller
. Unlike standard configuration parameters, these are stored in a binary format where each 8-bit parameter (numbered 900 to 999) represents eight distinct features. Key 900-Series Parameters fanuc ot 900 parameter list
Below is a list of common option parameters for the Fanuc 0-T system: | Parameter | Bit | Description | | :--- | :--- | :--- | | 0 | Canned Cycle (Drilling, Tapping, etc.) | | | 1 | G10 Program Input of Offset | | | 5 | Inch/Metric Conversion | | 0–4 | Tape Memory Addition (20M to 320M) | | | 5 | Chamfering and Corner Radius | | | 7 | Multiple Repetitive Canned Cycles (G70-G76) | | 2 | Constant Surface Speed Control (G96) | | 1 | X-axis Mirror Image | | | 2 | Actual Spindle Speed Output | | 1 | Work Offsets (G54–G59) | | 2 | Rigid Tapping | | | 3 | Clock and Part Counters Display | | 1 | G50/G51 Scaling | | | 2 | G68 Coordinate System Rotation | How to Access and Edit
Modifying these parameters is sensitive and typically requires a specific procedure to unlock the control: Enable PWE Parameter Write Enable (PWE) to 1 on the "Setting" screen. Enter EDIT Mode
: The machine must be in "EDIT" or "MDI" mode to accept changes. Password/Switch
: Some models require a physical switch inside the cabinet or a service password (often "9000") entered on the Diagnostics screen.
: Most changes to 900-series parameters require a full power cycle (Cold Start) to take effect. Google Groups Critical Precautions Fanuc O-T Parameter List Overview | PDF - Scribd
The Fanuc 0T Series (including 0T-A, 0T-B, and 0T-C) uses the 900 series parameters to enable specific software options and machine features. These are binary bit-level parameters where each number (900, 901, etc.) contains 8 individual bits (numbered 0 to 7) that function as on/off switches for features like canned cycles, additional memory, and macro programming. Critical Preparation & Safety
Warning: Changing 900-series parameters can disable your machine or cause severe damage if done incorrectly.
Backup Everything: Always perform a full SRAM backup or manually record every existing parameter before making changes.
PWE (Parameter Write Enable): You must enable PWE to make changes. Switch to MDI Mode. Press the SETTING function key.
Find PARAMETER WRITE and change it from 0 to 1. An "ALM 100" (PWE enabled) will appear; this is normal. Fanuc 0T 900-Series Parameter List
Below are the most common bit settings found in 900-series parameters for the 0T control. | Parameter | Bit | Description | In the Fanuc 0-T (OT) control series, the
| :--- | :--- | :--- || 900 | 0 | Canned Cycle (G70-G76) || | 1 | G10 Program Input of Offset || | 3 | Manual Pulse Generator (Handle) || | 5 | Inch / Metric Conversion || 901 | 1 | Tape Memory Addition (120M) || | 5 | Chamfering and Corner Radius || | 7 | Multiple Repetitive Canned Cycles || 902 | 2 | Constant Surface Speed (G96/G97) || | 6 | Custom Macro A || 903 | 1 | X-Axis Mirror Image || | 7 | Soft Keys (Below CRT) || 910 | 1 | Work Offsets (G54–G59) || 911 | 2 | Rigid Tapping || 912 | 0 | 3rd / 4th Reference Point Return | How to Edit 900-Series Parameters Fanuc 900 Parameter List Overview | PDF - Scribd
Fanuc OT 900 Parameter List: A Comprehensive Guide
The Fanuc OT 900 is a popular CNC (Computer Numerical Control) system used in various industries, including machining, fabrication, and manufacturing. The system's parameters play a crucial role in determining its performance, accuracy, and overall functionality. In this write-up, we will provide an overview of the Fanuc OT 900 parameter list, its importance, and a detailed breakdown of the various parameters.
What are Fanuc OT 900 Parameters?
Parameters in the Fanuc OT 900 system are numerical values that define the behavior of the CNC system. They control various aspects, such as:
These parameters are used to customize the system's behavior, optimize performance, and ensure accurate machining operations.
Importance of Fanuc OT 900 Parameter List
The Fanuc OT 900 parameter list is essential for several reasons:
Fanuc OT 900 Parameter List: Categories and Descriptions
The Fanuc OT 900 parameter list is extensive, with over 1,000 parameters. Here are some key categories and descriptions:
Some specific examples of Fanuc OT 900 parameters include: Axis movements and coordinates Spindle speed and feed
Best Practices for Managing Fanuc OT 900 Parameters
To ensure optimal system performance and minimize errors:
By understanding the Fanuc OT 900 parameter list and following best practices, users can optimize system performance, reduce errors, and improve overall productivity.
The Fanuc 0T 900 series parameters are critical "Option Parameters" that enable or disable specific software features and hardware capabilities. Each parameter consists of 8 bits (0–7), with each bit corresponding to a different function. Common Fanuc 0T 900 Parameters
Below is a list of frequently used 900-series parameters for the 0T control: | Parameter | Bit | Description | | :--- | :--- | :--- | | 0 | Canned Cycles (G70–G76) | | | 1 | G10 Program Input of Offset | | | 5 | Inch / Metric Conversion | | 1 | Tape Memory Addition (120M) | | | 5 | Chamfering and Corner Radius | | | 7 | Multiple Repetitive Canned Cycles | | 2 | Constant Surface Speed Control (G96/G97) | | | 6 | Custom Macro A | | 1 | X-Axis Mirror Image | | | 5 | Number of Programs (125) | | | 7 | Soft Keys below CRT | | 0 | Tool Geometry / Wear Offset | | 0 | Graphics Display | | 1 | Work Offsets (G54–G59) | | 2 | Rigid Tapping | | | 3 | Clock and Part Counters | How to Access and Edit 900 Parameters To modify these settings, you must first enable Parameter Write Enable (PWE) Fanuc Ot 900 Parameter List - Google Groups
FANUC supplied the OT control as a blank slate; lathe builders defined the 900 bits. Below are typical differences:
| Machine Builder | Typical 900 Params (examples) | Notes | |----------------|--------------------------------|-------| | Okuma (OSP 7000L) | 906 bit 0=1 (dogless reference), 908 bit5=1 (shortest path turret) | Uses absolute encoders – 900 params must match encoder type | | Mori Seiki (SL series) | 907 bit6=1 (rigid tapping), 910 bit7=1 (4th axis live tooling) | Heavy use of 904 PMC ladder protection | | Hardinge (T42, Conquest) | 902 bits 7-6=10 (PMC-R), 908 bit3=1 (random tool selection) | Unique tool changer logic tied to param 941-944 | | Haas (HL-1, HL-2 – early models) | 905 bit7=1 (custom macro), 909 bit4=1 (DNC with no parity) | Haas used modified FANUC OT firmware – check service manual |
Crucial: Always obtain the original builder’s 900 parameter list from the machine’s electrical schematic or a full SRAM backup file (.000 extension).
- and . keys to skip parameter loading (emergency method). Reload a known-good backup.With the machine in MDI mode, PWE (parameter write enable) set to 1, and the emergency stop engaged, Marco carefully entered each 900 parameter manually from the sheet.
When he hit 903 = 10000001 (binary), that re-enabled the PMC’s custom ladder.
When he set 910 bit 6 = 1, rigid tapping came back.
When he set 932 bit 0 = 1, the fourth axis (which Diego had forgotten existed) was recognized.
After cycling power, the green “Ready” light shone. Diego ran a test program. The turret indexed, the spindle oriented, the coolant turned on.
“Fixed,” Marco said. “But next time, photocopy that 900 list and store it in three places: cloud, safety box, and filed under ‘HOLY GRAIL’.”
In the Fanuc OT architecture, parameters 900–909 (and sometimes up to 919, depending on the CNC version) are stored in a protected area of the CNC’s non-volatile memory (CMOS). They are not backed up by the standard battery-backed RAM. Instead, they are tied to the CNC’s firmware.