Often used to define the number of servo amplifiers the control should recognize. 9921
If you accidentally toggle a bit in the 9900 range that disables your axis communication, you cannot simply "undo" it. You may need to perform a full system restore from a backup memory card or floppy disk to get the machine running again. fanuc 9900 parameter list
The FANUC 9900 series parameters represent a critical yet restricted set of configuration data within FANUC CNC (Computer Numerical Control) systems. Unlike standard parameters (1000–9000), the 9900 range governs high-level hardware configuration, axis linkage, and software option enablement. This paper provides a comprehensive list of common 9900 parameters, explains their functional domains, details the security protocols required for modification, and outlines safety procedures to prevent unrecoverable machine states. Often used to define the number of servo
| 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 | The FANUC 9900 series parameters represent a critical