Fanuc 9900 Parameter List Better Jun 2026

Press key.

In Fanuc CNC systems (such as 16i, 18i, 21i, and 0i series), the are designated as Option Parameters . These control the activation of specific software features and hardware functions that are typically sold as add-on options by Fanuc. Overview of Fanuc 9900 Option 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.

Sets the part program storage length in meters or kilobytes. fanuc 9900 parameter list

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 9900 parameters are bit-configured (0 or 1) to enable specific features. Below is a sample of common functions typically found in these tables: Parameter Range Function Examples

Enables the machine to move three axes simultaneously in a helical path, which is crucial for thread milling. Press key

Propose your current , and I can provide targeted cross-references.

Return to the SETTING screen and change back to 0 . 4. Troubleshooting 9900 Parameter Alarms

Understanding the underlying parameters and memory structures associated with this alarm is essential for diagnosing the root cause, recovering lost data, and getting your machine tool back into production. 1. What is FANUC Alarm 9900? Overview of Fanuc 9900 Option Parameters On later

While specific machine builders modify these values for custom setups, understanding core FANUC system parameters allows you to troubleshoot system errors, change communication protocols, and optimize machine performance. The Core Concept of FANUC System Parameters

Before you can view or modify any 9900 series parameter, you must overcome a multi-layered security system designed to protect these critical settings.

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