Insert a formatted CF Card (with PCMCIA adapter) or a USB drive into the control panel. Press the key. Press the [PARAM] softkey. Press the [(OPRT)] (Operation) softkey. Press the right arrow softkey to find [PUNCH] .
: You generally cannot change these manually. Enabling new options usually requires paying Fanuc for an "option file" that is loaded via memory card.
PARAMETER (OPTION) 9900 0 1 0 0 1 0 0 1 #7 #6 #5 #4 #3 #2 #1 #0 Use code with caution. Common Functions Managed by 9900 Parameters
Older controls (like the 0-M or 0-T) used the 900 series (900–939) for options. If you see 8-bit binary strings (e.g., 00010000 ), you are likely looking at these legacy option bits. fanuc 9900 parameter list
This guide explains the Fanuc 9900 parameter list, how parameters are organized and used, and practical tips for working with them safely and effectively. It’s written for CNC technicians, programmers, and engineers who need a clear, actionable reference.
Often tied to enabling custom macro variables and logic. 9937
These parameters define how the CNC controls the torque, speed, and position loops of the drive amplifiers. They are typically set during the initial machine build by the MTB (Machine Tool Builder) and are unique to the specific motor/amplifier combination. Insert a formatted CF Card (with PCMCIA adapter)
If you can clear the system alarm temporarily to back up data, you must inspect the PMC Keep Relays (K-parameters) which govern how memory errors are handled or how the machine behaves during memory writes:
To change a specific function, a technician changes a single 0 to a 1 (to enable) or a 1 to a 0 (to disable) in the corresponding bit position. Important Safety and Legal Warning
: Options for additional "Tape Memory" or part program storage. Advanced Machining : Enabling features like G96 Constant Surface Speed Cylindrical Interpolation High-Speed Cycle Machining System Functions Press the [(OPRT)] (Operation) softkey
: Parameters in the 9900 range were often visible and editable on the machine's parameter screen.
. Unlike standard operational parameters, these are frequently restricted and stored in non-volatile memory (FROM) to prevent accidental loss or unauthorized modification. Understanding Option Parameters (9900–9999)
Modifying these parameters improperly can cause system alarms, void your warranty, or lock your control. This guide outlines the structure, common functions, and safety protocols for dealing with the FANUC 9900 parameter list. Understanding FANUC 9900 Series Parameters