Fanuc 9900 Parameter List

Boot the machine into the BOOT system screen (hold the two rightmost soft keys under the screen while powering on). Check your SRAM allocation size and cross-verify that the physical cards match the software parameters. P/S ALARM 5000+ (Illegal Parameter Entry)

I can provide the specific bit-level settings or the references for your exact system. Fanuc Parameter Options Overview | PDF | Computing - Scribd

Editing any system parameter, especially option parameters, requires enabling .

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 fanuc 9900 parameter list

| Control Series | Primary Function of Parameter 9900 | Common Values & Their Meanings | | :--- | :--- | :--- | | | Defines the total controllable axes . | 3 (3-axis control, e.g., X, Y, Z) → 4 (to add a 4th axis, e.g., A axis). | | FANUC 0i MD/Mate MD | Defines total controlled axes via different parameters. | For the 0i MD model, the total control axis number is set in #8130 rather than #9900. | | FANUC 0i MF | Defines total controlled axes via different parameters. | For the 0i MF model, the total control axis number is set in #987 rather than #9900. | | General i-Series | Defines total number of axes ; a "master switch" for axis control. | Decreasing this value (e.g., from 4 to 3 ) can disable a specific axis (like a 4th axis) for troubleshooting. |

Select -> EXECUTE to export all current parameters into a .TXT or .PRM file. Step 2: Enable Parameter Write Enable (PWE)

CNC controls are highly sensitive to voltage drops and spikes. Utilizing a high-quality surge protector or line conditioner on the control transformer circuit significantly extends the life of memory chips. Boot the machine into the BOOT system screen

The SRAM requires a continuous lithium battery backup (usually 3V or 6V) when the main machine power is turned off. If the battery dies completely, the data turns into random noise, causing a parity check failure (Alarm 9900) on the next boot.

Configures the reference point return method (homing sequence) for each axis.

Sets the coordinate value for the maximum allowable travel in the positive direction for each axis. Fanuc Parameter Options Overview | PDF | Computing

: Use the SYSTEM function key and then the PARAM soft key to find the 9900 series.

Coordinate values for second and third reference points. 1420: Rapid traverse rate for each axis. 4077: Spindle orientation position adjustment. How to Access and Edit Parameters safely

⚠️ : The table above provides common examples from user forums and guides. The exact function and valid values for your 9900 parameter may differ. Modifying it can cause alarms (e.g., servo alarms) and will not allow you to unlock paid options without proper authorization.

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?

This is a showing the CNC software version (e.g., 0D03 = Series 0i-D, version 03). If this changes unexpectedly, the firmware is corrupt.