Sets the part program storage length in meters or kilobytes.
Select -> EXECUTE to export all current parameters into a .TXT or .PRM file. Step 2: Enable Parameter Write Enable (PWE)
Configures the feedback pulses per motor revolution from the pulse coder (encoder).
Cylindrical interpolation, polar coordinate interpolation, and helical interpolation. fanuc 9900 parameter list
Replace the lithium battery in the CNC control unit (usually located on the main yellow master PCB structure) with the if possible, or immediately after a shutdown to minimize data loss window. Step 2: Access the FANUC Boot System Menu
Why? Because the 9900s are not tuning parameters—they are configuration parameters. An incorrect entry can:
This usually requires a full memory clear procedure during bootup (holding RESET and DELETE keys during power-on), followed by reloading your verified offline parameter backup file. SV Alarm 417 (Servo Alarm: Digital Parameter Fault) Sets the part program storage length in meters or kilobytes
Open the saved file on a computer using a text editor (like Notepad++) and scroll down to the :9900 section to view your machine's specific configuration. Troubleshooting 9900 Parameter Errors
: Use the SYSTEM function key and then the PARAM soft key to find the 9900 series.
When dealing with a system alarm, you usually cannot access the standard parameter pages because the CNC software fails to load completely. However, if the machine boots intermittently, or if you are using the (accessed by holding the two rightmost softkeys under the screen during power-on), specific memory allocations and parameters dictate how data is stored and validated. SRAM and FROM Allocation Sizes Because the 9900s are not tuning parameters—they are
To change any parameter, the Parameter Write Enable (PWE) must be set to 1: [OFFSET/SETTING] PARAMETER WRITE=1 (Ignore the alarm P/S 100). page to make changes. After changes, set PARAMETER WRITE=0 Turn the power off and back on. 5. Troubleshooting Lost Options
Editing any system parameter, especially option parameters, requires enabling .
On modern "i" series controls (like the 16i, 18i, and 21i), the 9900 series is used primarily for . Parameter # Common Function / Meaning 9900
The exact function of a 9900 parameter varies by control model (e.g., 0i, 16i, 31i). Below are common examples found in standard lists: Parameter No. Description Often defines the total number of controlled axes. Tape Memory Addition (e.g., 120M). Custom Macro A activation. Spindle Speed Fluctuation Detection. X-axis Mirror Image. PMC Model selection (L, M, etc.). 200 Registerable Programs. 3. Access and Visibility Modern Controls (Post-2006)
Tells the control whether a specific axis name corresponds to a linear axis (X, Y, Z) or a rotary axis (A, B, C).
