Fanuc 9900 Parameter List 〈macOS EXCLUSIVE〉

A machine tool builder sets:

After changing these, the servo amplifier for axis 4 must be physically present and parameter 202x (servo number) correctly set. Failure to match hardware results in “SERVO ALARM: AXIS 4 NOT READY”.

On most modern Fanuc controls, the 9900 parameters are write-protected. To view or modify them, you generally need to follow this procedure: fanuc 9900 parameter list

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

The Fanuc 9900 (Fanuc Series 0i/16/18/21/30 family derivatives sometimes labeled 9900 in documentation) parameter list controls machine behavior, axis configuration, servo tuning, I/O mapping, interpolation, safety limits, and more. Below is a comprehensive reference grouped by function. Use caution: changing parameters can make equipment unsafe or inoperable. Back up current parameter values before editing. A machine tool builder sets:

This block defines:

Fanuc intentionally hides 9900-series parameters because: After changing these, the servo amplifier for axis

On many Fanuc controls, you cannot see parameter 9900 unless you enable "Parameter Write Enable" (PWE = 1) and sometimes enter a special mode or key code.

Use these categories to locate settings quickly. Exact parameter numbers may vary by Fanuc 9900 firmware and machine builder options; always consult your machine-specific manual.