Enables the machine to move three axes simultaneously in a helical path, which is crucial for thread milling.
Leave the model number (e.g., Fanuc 0i-MF) and the exact parameter number in the comments below—or consult your MTB’s technical hotline.
| Parameter | Typical Function | Data Type | Example Value | Notes | | :--- | :--- | :--- | :--- | :--- | | | Number of controlled axes (basic) | Byte | 2, 3, 4 | Set by MTB; changing causes mismatch | | 9901 | Option: Additional axes enable | Bitmask | 0x0001 | Enables 4th/5th axis options | | 9902 | Spindle configuration mode | Byte | 0=analog, 1=serial | Serial = FANUC spindle drive | | 9903 | PMC (ladder) type selection | Byte | 0,1,2 | 0=PMC-L, 1=PMC-M, 2=PMC-N | | 9904 | High-speed machining option | Bit | 0/1 | Enables AI contour control | | 9905 | Number of PMC I/O links | Byte | 1-8 | Must match hardware rack config | | 9906 | Software series ID | Read-only | e.g., 0x20A | Do not modify | | 9907 | Axis assignment order | 4-byte hex | 0x01020304 | Maps logical to physical axes | | 9908 | Servo software version lock | Binary | Factory set | Prevents servo mismatch | | 9910 | Option: Rigid tapping enable | Bit | 0/1 | Requires spindle encoder | | 9913 | Macro executor (A/B) | Byte | 0=no, 1=A, 2=B | Enables custom G-code macros | | 9915 | DNC operation enable | Bit | 0/1 | Allows drip-feed via RS-232 | | 9920 | Maximum spindle speed limit | Integer (rpm) | 6000 | Overridden by S command | | 9925 | PMC scan cycle time (ms) | Byte | 4,8,16 | Affects ladder response | | 9930 | Password key for 9900 edit | 8-digit hex | Random | Used by MTB for security | | 9940 | Axis stroke limit type | Bit | 0=standard, 1=dual | Changes overtravel logic | | 9950–9959 | OEM-defined machine constants | Various | MTB-specific | E.g., tool changer positions | | 9960 | CNC model ID (low byte) | Read-only | e.g., 0x10 | For option compatibility | | 9970 | Software option enable mask | 32-bit | Factory calc | Enables turning/milling/grinding | | 9980 | Backup checksum seed | Hex | Factory | Used for memory integrity | | 9999 | Security parity | Byte | Validates 9900 block | If wrong → system alarm | fanuc 9900 parameter list
FANUC Series 0i-MC/MD/MF, 16i/18i/21i Series, and Series 30i/31i/32i.
For general Fanuc programming and troubleshooting, you can find expert communities and guides on platforms like the Industrial Forum at eMastercam or technical deep-dives on CNC Concepts . Enables the machine to move three axes simultaneously
| Bit | Option Enabled | |------|----------------| | #0 | High-speed machining (AICC) | | #1 | Manual guide i (conversational programming) | | #2 | Helical interpolation | | #3 | Thread retract | | #4 | Tool life management | | #5 | Cylindrical interpolation | | #6 | Polar coordinate interpolation | | #7 | Scaling |
2. Critical Memory Parameters & Diagnostics Linked to Alarm 9900 For general Fanuc programming and troubleshooting, you can
Navigating the Fanuc 9000 Series: Understanding Parameter 9900 and Beyond
It is crucial to understand that many of the parameters discussed, especially those controlling program editing for 8000-8999 and 9000-9999, are protected by a password system. This is an additional layer of security beyond standard PWE.