If you have ever scrolled through the parameters on a Fanuc CNC control (Series 0i, 16i, 18i, 21i, 30i, or 31i), you have likely noticed a gap or a protected zone around parameter numbers 9000 through 9999. These are the Fanuc 9000 parameters, often referred to as the "hidden parameters," "option parameters," or "secret parameters."
To safely work with 9000 parameters:
In the Fanuc CNC ecosystem, "9000 parameters" typically refers to Option Parameters (often starting at 9000 or 9900 depending on the control model) that enable specific software features, or the settings used to manage 9000-series macro programs. Critical Management Parameters (Editing 9000 Programs) fanuc 9000 parameters list
If you want, I can: