Fanuc 9900 Parameter List -
Modifying 9000-series parameters without a valid option authorization code from Fanuc can lock your controller or cause severe machine malfunction. Always backup your current parameters ( backup) before attempting changes. 1. Function and Purpose
Before you even look at the 9900 parameters, you must have a complete backup of your machine's SRAM (Static RAM).
Why? Because the 9900s are not tuning parameters—they are configuration parameters. An incorrect entry can: fanuc 9900 parameter list
The 9900 series is not a single-purpose list. It is a range of 100–200 parameters (depending on the CNC generation), each responsible for a high-level system feature. Below is the most common mapping for controls.
(e.g., 16i, 18i, 21i, 0i-M/T). These are often referred to as "Option Parameters" or "Option Bits." ⚠️ Crucial Safety Warning Function and Purpose Before you even look at
: The machine must be in Manual Data Input (MDI) mode or an emergency stop state.
These parameters are bit-level settings where each "bit" (a 1 or 0) enables a specific software option. Parameter No. Typical Function / Feature Often sets the total number of axes enabled on the machine. 9920.0 An incorrect entry can: The 9900 series is
⚠️ Only qualified maintenance personnel should modify these parameters. Incorrect settings can cause servo alarms, motor vibration, or mechanical damage.
