Custom Macro B activation (enabling the use of variables, logic statements, and expressions like #100 = 1.0 ). User Macro memory expansion. Scaling, coordinate system rotation, and mirror imaging. 5. Hardware & Communication Interfaces Ethernet/Data Server functionality. Additional I/O link channels.
The FANUC 9900 parameter list is extensive and specific to each CNC machine's configuration and operational requirements. Understanding and correctly setting these parameters is vital for the safe, efficient, and accurate operation of the machine. It is always recommended to consult the machine's manual or contact a FANUC professional for specific guidance on parameter settings to avoid errors and ensure optimal performance.
FANUC parameters are generally organized by function. To understand where the 9900 series fits, look at the standard memory map: fanuc 9900 parameter list
FANUC CNC systems utilize parameters to define machine behavior, from servo gain to I/O assignments. Parameters 9900–9999 are distinct: they are 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.
Press the softkey and change Parameter Write Enable (PWE) from 0 to 1 . Ignore the resulting system alarm. Press the [SYSTEM] key, then press the [PARAM] softkey. Custom Macro B activation (enabling the use of
| Control Series | Primary Function of Parameter 9900 | Common Values & Their Meanings | | :--- | :--- | :--- | | | Defines the total controllable axes . | 3 (3-axis control, e.g., X, Y, Z) → 4 (to add a 4th axis, e.g., A axis). | | FANUC 0i MD/Mate MD | Defines total controlled axes via different parameters. | For the 0i MD model, the total control axis number is set in #8130 rather than #9900. | | FANUC 0i MF | Defines total controlled axes via different parameters. | For the 0i MF model, the total control axis number is set in #987 rather than #9900. | | General i-Series | Defines total number of axes ; a "master switch" for axis control. | Decreasing this value (e.g., from 4 to 3 ) can disable a specific axis (like a 4th axis) for troubleshooting. |
To view the 9900 parameter list on your FANUC control, you must place the machine in a state that allows system parameter viewing. Select on your operator panel. Press the OFFSET/SETTING key. Press the SETTING softkey. The FANUC 9900 parameter list is extensive and
Enabling a feature like a 4th axis or specific interpolation without the correct hardware or supporting parameters can cause erratic machine behavior. Essential Backup Protocol