The Fanuc 9900 series parameters are specifically categorized as Option Parameters for controllers like the Series 16i, 18i, and 21i. These parameters determine which software features and hardware capabilities are enabled on your machine. Key Insights on 9900 Parameters
Purpose: They unlock specific CNC functions such as additional memory, high-speed machining, tool life management, and multi-axis control.
Visibility: On older "i" series controls, they appear on the standard parameter screen. On controls manufactured after mid-2006, they are often stored on a FROM card and may only be viewable through diagnostic screens.
Access: Because these represent paid options, they are typically protected. Changing them incorrectly can lead to machine malfunction or "unpredictable movement". Common 9900 Series Parameters & Options
While the exact bit definitions vary by specific controller model (e.g., ), they generally cover the following areas: Parameter Range Typical Function Category Examples of Options 9900 Axis Configuration Number of controlled axes. 9901 - 9910 Memory & Language
Tape memory additions (320m/120m), Japanese/German/French display. 9911 - 9925 Machining Cycles
Program restart, 3rd/4th reference point return, High-speed cycles. 9930+ Specialized Features
Tool offset selection (G45-G48), Cylindrical interpolation, Mirror imaging. How to View or Edit Parameters
Warning: Only modify parameters if you have the original manufacturer settings. Back up all data before proceeding. How to Enable Parameter Write Enable (PWE) on a Fanuc CNC fanuc 9900 parameter list
This is a read-only parameter showing the CNC software version (e.g., 0D03 = Series 0i-D, version 03). If this changes unexpectedly, the firmware is corrupt.
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Understanding Fanuc 9900 Series Option Parameters In the world of FANUC CNC controls, the 9900 series parameters (often ranging from 9900 to 9999) are known as Option Parameters
. These parameters are typically set by the factory or authorized machine tool builders to enable or disable specific software features and hardware capabilities of the controller. Key Functionality of the 9900 Series
The 9900 series controls high-level machine configurations. While specific bit meanings can vary slightly between controller generations (such as the 0-M/T, 16i, 18i, or 30i series), they generally govern: Axis Configuration : Parameter
often defines the total number of controllable axes on the system. Memory Upgrades
: Options for additional "Tape Memory" or part program storage. Advanced Machining : Enabling features like G96 Constant Surface Speed Cylindrical Interpolation High-Speed Cycle Machining System Functions Parameter 9933 – Software Series Code This is
: Custom Macro A/B, Background Editing, and Work Coordinate System sets (G54-G59). Common 9900 Series Parameter Examples : Total controllable axes. #9923 Bit 5 : Often used to enable 48 additional Work Offsets. : Allow axis expansion on certain 0i models. Accessibility and Security
Accessing the 9900 series is different from standard system parameters due to their critical nature: Visibility
: On modern controls (post-2006), these parameters are often hidden from the standard parameter screen and must be viewed via a Diagnostic screen Modifiability
: Historically, these were field-settable by experienced technicians. However, modern FANUC systems have "locked out" manual changes to these bits. Authorized Activation
: To add a new option, users typically must pay for the feature. FANUC then provides a specific configuration file (often via an "EZOPT" process) to update the parameters officially. How to View Parameters (Standard Procedure) To view existing settings on your control: function key. Select the (Number Search) to jump to that section. If the 9900 series does not appear, check the screen or system maintenance menus. Fanuc Parameter Options Overview | PDF | Computing - Scribd
The Fanuc 9900 series parameters are critical system-level settings used primarily in newer Fanuc controls (such as the 0i, 16i, 18i, and 21i series) to define machine configuration and unlock optional software features.
Unlike standard user parameters, these are often "locked" or stored in non-volatile memory (FROM) to prevent accidental erasure during a standard parameter clear or battery failure. Understanding the 9900 Series Structure
In Fanuc terminology, parameters in the 9900 range typically function as bit-type settings where each of the 8 bits (0-7) represents a specific machine option or software function. For example, in many controls, Parameter 9920 controls fundamental motion and interface options. Common Parameter 9920 Bit Descriptions Binary Value Function Description 0 00000001 Parameter numbering varies by Fanuc model and CNC
Fixed/Canned Cycles: Enables standard drilling/tapping cycles. 1 00000010
G10 Input: Allows program input of offset/parameter values via G10. 2 00000100
Manual Pulse Generator (MPG): Enables the electronic handwheel feed. 4 00010000
Spindle S4/S5 Output: Configures analog spindle control signals. 5 00100000
Inch/Metric Conversion: Enables switching between measurement systems. Extended 9900 Series Feature List
The following parameters are frequently found in 16i/18i/21i and 0i series documentation for activating advanced features: 9921: Program Storage Capacity Bit 0: 640m Storage Bit 1: 320m Storage Bit 4: 40m Storage 9922: Motion Control & Macros Bit 2: Constant Surface Speed Control (G96) Bit 6: Custom Macro A 9923: Operations Bit 4: MDI Operation B Bit 5: Registration for 125 Part Programs Bit 7: Background Editing 9924: Language Displays Bit 0: Japanese Bit 1: German/French Bit 3: Italian Bit 5: Spanish Accessing and Modifying 9900 Parameters
Modifying these parameters is high-risk and usually requires specific authorization because they govern the control's core capability. Fanuc Parameter Options Overview | PDF | Computing - Scribd
This content is structured to be useful for a technical blog post, a reference guide, or a training document. Please note the critical safety warnings regarding these parameters.
On later controls (31i-B, 31i-C, 0i-F), the 9900s may appear as “########”. You must enter a specific password via a parameter (often 8953 or 8900 #16, depending on the MTB). Without this, you cannot view or edit the list.
⚠️ Warning: Do not attempt to guess passwords. Consult your machine manual or Fanuc representative.