Software limits act as digital walls to stop the machine before it hits physical limit switches.
Practical note: Fanuc often stores multiple tuning sets per axis (slot 1, slot 2 …). Changing these affects dynamic response; tune methodically with appropriate tools (oscilloscope, response monitor). fanuc 11m parameter list
These settings manage the main spindle motor and tool offsets. Software limits act as digital walls to stop
The is a highly capable CNC control system known for its longevity and precision. However, maintaining, repairing, or reconfiguring these machines requires a deep understanding of their parameter lists . These parameters act as the configuration files, defining everything from communication settings to machine-specific axis behavior. These settings manage the main spindle motor and
: Position detector type (Absolute vs. Incremental encoders).
| 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) |