Navigate to the -> PARAMETER screen and search for 9900.
Modifying system-level parameters can trigger specific initialization alarms. Here is how to address them: Alarm Code / Message Probable Cause Corrective Action PWE bit is still set to 1. Change the PWE value back to 0 on the Setting page. SYS_ALM 900 / 910 MAIN RAM ERROR Incorrect memory allocation value in 9920–9930 range. Reload the original SRAM backup via the Boot screen. P/S 000 PLEASE TURN OFF POWER A system parameter requires a hard reboot to initialize. Cycle the main breaker power switch on the machine. Write Protected / Invalid Input
The following parameters are frequently found in 16i/18i/21i and 0i series documentation for activating advanced features: 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 fanuc 9900 parameter list
Among these, the hold a unique and critical position. This article provides an in-depth breakdown of what the 9900 parameters do, how to interpret them, and how to safely manage them on your CNC machinery. What Are FANUC 9900 Parameters?
This guide explains the Fanuc 9900 parameter list, how parameters are organized and used, and practical tips for working with them safely and effectively. It’s written for CNC technicians, programmers, and engineers who need a clear, actionable reference. Navigate to the -> PARAMETER screen and search for 9900
Maps physical servo channels to logical axes within a specific path.
The parameters are usually represented in bit format (00000000), where each bit represents a specific option. Change the PWE value back to 0 on the Setting page
Ensure the machine is in Manual Data Input (MDI) mode and the Emergency Stop button is pressed for safety. Enable Parameter Write: Press the [SETTING] function key. Locate PARAMETER WRITE (PWE) .
If you have worked with Fanuc CNC controls (Series 0i, 16i, 18i, 21i, 30i, etc.), you have likely scrolled through parameters 0001 to 9999. But when you try to access parameters starting around 9900, you may find them missing or locked. This is because , especially serial servos and spindles.
These parameters tell the CNC what kind of motor is attached to the axis.