| Parameter | Description & Notes | | :--- | :--- | | | General purpose parameter. Used for setting ISO/EIA code format (e.g., xxx01000 for ISO) | | #0020 - #0023 | Input/Output device numbers for foreground/background communication | | #0987 , #0988 | Set the number of control axes (e.g., #0987=5 for a 5-axis system). Crucial for multi-axis configuration, as it defines the total number of servo and spindle axes the CNC will control | | #1001#0 (INM) | Sets the minimum input increment: 0 for metric (mm), 1 for inch | | #1002#0 (JAX) | Sets simultaneous manual feed axes: 0 for single-axis jog, 1 for 3-axis simultaneous jog | | #1005#0 (ZRN) | Defines reference return check: 0 alarms if not referenced, 1 allows operation without referencing | | #1005#1 (DLZ) | Enables 1 or disables 0 dogless reference return for absolute encoders | | #1006#3 (DIA) | Sets 1 for diameter or 0 for radius programming (lathe-specific). Essential for lathe users | | #1006#5 (ZMI) | Sets reference return search direction: 0 for positive, 1 for negative | | #1020 | Defines the program axis name. Standard milling (M-series) names: X=88 , Y=89 , Z=90 | | #1022 | Assigns the axis position in the basic coordinate system | | #1023 | Assigns the servo axis number, typically matching the control axis number | | #1240 | Sets the 1st reference point (G28) position in machine coordinates | | #1320 , #1321 | Sets the positive ( #1320 ) and negative ( #1321 ) software overtravel limits. These are critical for safety | | #1401#0 (RPD) | Enables 1 or disables 0 manual rapid traverse before referencing | | #1402#4 (JRV) | Selects feed type: 0 for feed per minute, 1 for feed per revolution | | #1420 | Sets the rapid traverse rate for each axis | | #1423 | Sets the Jog feed rate for each axis | | #1815 | Absolute Encoder Setting (highly critical) : Includes bits for APC (Absolute Position Detector, #1815#5 ), APZ (Zero Point, #1815#4 ), and OPT (Separate Detector) | | #1820 | Command Multiplier Ratio (CMR). Calculated as (Command Unit / Detection Unit) x 2 | | #1825 | Sets the servo position loop gain | | #1826 | Sets the in-position width (allowable deviation) for each axis | | #1828 | Sets the position deviation limit during movement | | #1829 | Sets the position deviation limit at a stop | | #3111#0 | When set to 1 , this displays the "Servo Setting" and "Servo Adjustment" screens on the control, which are critical for configuring servos | | #9000 series | Option Parameters : These unlock software features. They are typically entered in two-digit hexadecimal format (e.g., OP1 = 2E for 0010 1110 ) and are often password-protected | | #5001 , #5110 , #5112 | RS232 Communication : Set device selection, DC codes (stop bits), and baud rate (e.g., #5112=10 for 4800 baud, 11 for 9600) |
The Fanuc 11M relies on precise feedback loops to ensure the physical tool position matches the digital command. When these loops fall out of sync, the system throws position deviation alarms. Position Loop Gain
Use the following parameters to configure your serial communication: Port Selection and Formatting fanuc 11m parameter list
Do not wait for the battery alarm. Find your machine’s original parameter booklet or download a community-sourced list today. Punch them out to a PC. Write them down in a notebook. Do all three. The peace of mind knowing you can resurrect a "dead" Fanuc 11M in 20 minutes rather than 20 days is invaluable.
These parameters prevent the machine from mechanically crashing into its own castings. | Parameter | Description & Notes | |
| Param | Description | Typical Value / Bits | |-------|-------------|----------------------| | 0000 | Option bits (mirror image, DNC, etc.) | Binary (bit mask) | | 0001 | RS-232 / baud rate | e.g., 4800, 9600 bps | | 0012 | Axis assignment & rotation direction | Bits 0–5 | | 0100 | Servo motor type / pulse coder | 101–255 (machine specific) | | 0200 | Inch/Metric selection | 0 = mm, 1 = inch | | 0220 | G-code system A/B/C | 0, 1, or 2 | | 0300 | Positioning check width (µm) | 10–200 | | 0500 | Spindle max speed (RPM) | e.g., 6000 | | 0510 | Gear ratio (spindle to encoder) | 100–32767 | | 0700 | Work coordinate system presets | 0 = G92, 1 = G54+ | | 8000.0 | Parameter Write Enable (PWE) | 0 = locked, 1 = unlocked |
: Velocity, acceleration, and deceleration limits. Essential for lathe users | | #1006#5 (ZMI)
Absolute Encoder Settings (Position storage when power is off)
Device Type for I/O Channel 2 (Set to 3 for standard RS-232)
Before diving into the parameters, it's important to understand the hardware that uses them. The Fanuc 11M is a 32-bit, multi-processor system using a 68000 series CPU. This series primarily used a "large motherboard" architecture, with smaller, specialized boards (like the PMC, ROM/RAM, and Bubble Memory boards) plugged into it.