Similar to the above, these allow calling 9000-series macros using custom G-codes . 2. System Option Parameters (9000–9999)

Changing these parameters without factory documentation can render your machine unusable or cause dangerous crashes.

Similar to NE9, but protects 8000-series programs.

Note: This list is aggregated from FANUC Series 16i/18i/21i and 0i-D/F. Machine builders may alter functions. Always verify with your original machine tool manual.

Before modifying anything, do a full parameter output:

Unlike standard parameters (100–9000 range), which control basic machine behavior like feedrates, acceleration, and axis configuration, the 9000-series parameters unlock or disable on the CNC. They determine whether your machine has high-speed machining, rigid tapping, additional axes, or even specific cycles like custom macro B.

“You’ll void the UL listing,” he said, but his voice lacked conviction.

allow you to assign a custom G-code to call a specific 9000-series program, while 6080–6089 do the same for M-codes. CNC Training Centre Critical Warning