List: Fanuc 9900 Parameter

| Your Fanuc Model | Likely has 9900 params? | Where to configure motors | |----------------|------------------------|---------------------------| | 0-Mate, 0-TC, 0-MC | Yes (common) | Parameters 9900–9910 | | 16/18/21 i-A, i-B | Sometimes (depends on firmware) | Servo/Spindle screen or 9900 | | 0i-C, 0i-D, 0i-F | Rare | Servo Setting screen | | 30i/31i/32i | No | Servo/Spindle setting screen |

Mistakes happen. Here is the recovery path:

If you have worked with Fanuc CNC controls (Series 0i, 16i, 18i, 21i, 30i, etc.), you have likely scrolled through parameters 0001 to 9999. But when you try to access parameters starting around 9900, you may find them missing or locked. This is because Fanuc parameters 9900 to 9999 are typically configuration parameters for optional hardware, especially serial servos and spindles. fanuc 9900 parameter list

This article explains the purpose of the 9900 series, common parameters you will find there, and the critical precautions for editing them.

Below is a sanitized example from a working 5-axis machining center: | Your Fanuc Model | Likely has 9900 params

| Param | Value (Hex/Decimal) | Meaning | |-------|---------------------|---------| | 9900 | 0003C200 | CPU type: iHMI with 4MB DRAM | | 9901 | 00000103 | 4 axes + Cs contouring + spindle sync | | 9902 | 11000101 | AICC on, Helical on, Scaling on, Tool life on | | 9903 | 0000000F | Two spindles, orientation, sync, rigid tapping | | 9904 | 00000003 | 5th axis present | | 9905 | 00000064 | 100-block look-ahead | | 9906 | 00000000 | Servo amp ID (auto-set) | | 9921 | 00010002 | Nano interpolation + Smooth TCP enabled | | 9933 | 90300D03 | Software: 30i-B, version D03 |

FANUC CNC systems utilize parameters to define machine behavior, from servo gain to I/O assignments. Parameters 9900–9999 are distinct: they are hardware and software configuration parameters set at the machine tool builder (MTB) level. Unauthorized or incorrect changes to these values can disable the CNC, corrupt the PMC (Programmable Machine Controller), or render the machine inoperable. If you have worked with Fanuc CNC controls

This paper aims to: