Fanuc 9900 Parameter List !!top!! 💯
This report provides an overview of the Fanuc 9900–9999 series parameters , which are primarily used to define the options and software features installed on Fanuc CNC controls
Below is a selection of commonly cited 9900-series bits for the 16i/18i/21i controls: Parameter.Bit Description 9920.1 Tool offset input with G10 9920.5 Inch/Metric conversion 9922.2 Constant surface speed control 9922.6 Custom Macro A 9925.3 Look-ahead control (High-speed machining) 9926.7 External tool compensation 9937.4 Extra Macro Variables How to Check Your Current Options fanuc 9900 parameter list
Memory Expansion: Increasing program storage capacity (e.g., from 40m to 320m). This report provides an overview of the Fanuc
- Some controls require a specific key sequence or a "Keep Relay" (PMC K-Parameter) to be set to "1" to allow editing of system parameters.
- Note: This differs by machine builder.
Parameter Number: Input the specific parameter number you wish to modify. Some controls require a specific key sequence or
Accessing and Modifying Parameters
Enter parameter number 9900 and press NO.SRH.
- Power off the machine immediately.
- Boot the CNC while pressing the “−” and “.” keys (for Series 0i) or “RESET + CAN” (for Series 30i) to enter IPL (Initial Program Load) mode.
- From IPL, select → “Clear all RAM” (this wipes only volatile memory, but keep your backup ready).
- Reload your full parameter backup from the PCMCIA card using “BOOT SYSTEM” → “SRAM BACKUP RESTORE.”
- If the control still alarms, call Fanuc or your MTB with the saved backup and error code.
Where to find the exact parameter list for your machine
- Primary source: the machine tool builder’s documentation and the Fanuc 9900 maintenance/service manual specific to your controller firmware and options.
- Do not rely solely on generic lists — builders often add or remap parameters for machine-specific functions.