The Fanuc 11M is a classic CNC control system widely used in milling machines. To optimize performance or perform maintenance, understanding the Fanuc 11M parameter list is essential. These parameters control everything from basic machine identity to complex servo and spindle behaviors. How to Access and Enable Parameter Editing Before you can modify most parameters, you must enable "Parameter Write." Select MDI Mode: Ensure the machine is in Manual Data Input mode. Enable PWE: Push the SETTING soft key, find parameter 8000 , and set bit #0 (PWE) to 1 . A "Parameter Write Enable" alarm will appear; this is normal and expected. Navigate to Parameters: Press the SERVICE soft key followed by the PARAM soft key to view the list. Fanuc 11M Parameter Categories The Fanuc 11M organizes thousands of settings into specific numerical ranges. 1. General System and Communication (0000–5112) These parameters manage the basic interface and RS-232 communication settings for DNC or program transfers . 0000: Basic settings like ISO/EIA code selection. 5110: Device type (e.g., 1 or 3 for standard RS-232 devices). 5111: Stop bits (typically set to 1 or 2). 5112: Baud rate (e.g., 10 for 4800, 11 for 9600). 2. Servo and Axis Control (1000–2500) Controls the physical movement of the axes, including travel limits and reference points. 1241: Coordinate value of the 2nd reference point . 1242: Coordinate value of the 3rd reference point . 1825–1830: Servo loop gain and error limits (often checked during servo alarms ). 3. Spindle and Tool Settings (5600–6000) These settings manage the main spindle motor and tool offsets. 5600+: Parameters related to spindle orientation and analog/binary outputs. 6000+: Tool offset and compensation settings. 4. Canned Cycles and Macros (6200–7000) Configurations for automated machining routines. 6200: Canned cycle parameters (drilling, tapping, etc.). 7000: Custom macro variables and settings. 5. Option Parameters (9100–9125) These define which software features are enabled on the control. FANUC Second Reference Point - CNCmakers
The Role of the Fanuc 11M Parameter List in CNC Precision and Maintenance The Fanuc 11M control system, a staple of 1980s manufacturing, remains a vital piece of hardware in many machine shops today due to its robust design and reliable performance. At the heart of this reliability lies the parameter list , a complex repository of numerical values and bit-level switches that define every aspect of the machine’s operation. From basic communication settings to advanced motion control and optional feature unlocking, the Fanuc 11M parameter list serves as the "DNA" of the CNC machine, making its proper management essential for both daily operation and long-term maintenance. Core Functions of the Parameter List The Fanuc 11M parameter list is organized into distinct categories based on functionality: Fanuc System 10/11/12 Parameter Manual (B-54810E/02) Parameters Related to Canned Cycle (Data number 6200) .. Parameters Related to Scaling and Coordinate Rotation (Data number 6400%) Common CNC Machine Parameter Guide - ALLPCB
This is a comprehensive technical report regarding the Parameter List for the FANUC 11M Model CNC Control . Important Note: The FANUC 11M was introduced in the mid-1980s. Parameters are highly machine-specific (set by the MTB - Machine Tool Builder). Do not blindly load a generic list. You must have a physical backup (printed or on tape/RAM) from your specific machine.
Report: FANUC 11M Parameter Guide 1. System Overview fanuc 11m parameter list
Type: CNC for Milling/Machining Centers. Era: Late 1980s to early 1990s (Pre-16/18 series). Memory: Bubble memory or CMOS (requires battery backup). Display: 9" CRT (green monochrome or color optional).
2. Parameter Ranges & Categories The 11M uses a 4-digit or 5-digit parameter numbering system (typically 0000 to 9199, depending on options). | Parameter Range | Category | Description | | :--- | :--- | :--- | | 0000 – 0059 | Option Parameters (NC) | Enables live tooling, rigid tapping, custom macros, DNC, etc. | | 0060 – 0089 | Axis Configuration | Stroke limits, axis direction, mirror image. | | 0090 – 0109 | Feedrate & Acceleration | Rapid traverse (G00), cutting feedrate limits (G01). | | 0110 – 0139 | Servo & Motor Parameters | Position loop gain, feedforward coefficient, backlash compensation. | | 0140 – 0159 | Reference Point | Grid shift, reference return direction, deceleration points. | | 0160 – 0199 | Spindle Parameters | Gear ratios, C-axis control, orientation stop position. | | 0200 – 0239 | Coordinate System | Absolute/incremental, diameter programming, I/J/K specifications. | | 0240 – 0259 | Tool Offset | Number of tool offsets, length/radius type, wear compensation. | | 0260 – 0299 | Automatic Operation | Single block, dry run, feed hold behavior. | | 0300 – 0319 | Editor & Program | Tape coding (ISO/EIA), punch code, program number lock. | | 0320 – 0359 | Communication (RS-232) | Baud rate, stop bits, parity, DC code control (Xon/Xoff). | | 0360 – 0399 | Diagnostic Parameters | Self-diagnostic thresholds, watchdog timers. | | 0400 – 0429 | Pitch Error Compensation | Compensation points per axis, interval, direction. | | 0430 – 0549 | SERVO PARAMETERS (Critical) | Requires IPL mode to change. (Motor model, current limit, velocity gain, PWM frequency). | | 0900 – 0939 | Option Parameters (High Security) | Hideable via parameter 10.4. Control software options. | | 5000 – 9199 | Macro & Customization | User macro variables, arguments, and local variables. | 3. Critical Parameters (By Function) 3.1 Machine Setup (Must match MTB specs) | Param | Bit/Value | Function | | :--- | :--- | :--- | | 0000 | Bit 1 (INCH) | 0 = Metric, 1 = Inch input | | 0002 | Bit 7 (I/O CH) | 0 = RS-232 (Channel 0), 1 = Channel 1 (for tape reader) | | 0004 | Bit 0 (MIRx) | Mirror image for X axis | | 0012 | Value | Number of controlled axes (2, 3, 4, or 5) | | 0022 | Binary | Axis assignment (e.g., 101 = X, Y, Z) | 3.2 Reference Return & Stroke Limits | Param | Function | | :--- | :--- | | 0100 | Reference point #1 (X axis coordinate) | | 0101 | Reference point #1 (Y axis) | | 0102 | Reference point #1 (Z axis) | | 0120 | Grid shift amount (X) – for fine-tuning reference position | | 0700 – 0705 | Positive stroke limit (X, Y, Z, etc.) | | 0706 – 0711 | Negative stroke limit (X, Y, Z, etc.) | 3.3 Servo Gains & Tuning | Param | Description | Typical Range | | :--- | :--- | :--- | | 0140 (X) | Position loop gain (Kp) | 2000 – 8000 (0.01/sec) | | 0141 (Y) | Position loop gain | Same as X | | 0142 (Z) | Position loop gain | Slightly lower than X/Y | | 0180 (X) | Backlash compensation | 0 – 9999 (0.001mm or 0.0001in) | 3.4 RS-232 Communication (Punch/Read) | Param | Setting | | :--- | :--- | | 0310 | Baud rate (e.g., 12 = 4800, 13 = 9600) | | 0311 | Stop bits (0=1 stop, 1=2 stops), parity | | 0312 | DC code (0=DC1/DC3, 1=DC2/DC4) | 3.5 Axis Inversion & Polarity | Param | Bit | Function | | :--- | :--- | :--- | | 0060 | Bit 0 (X) | 0 = Normal, 1 = Reverse direction (X) | | 0060 | Bit 1 (Y) | Reverse direction (Y) | | 0060 | Bit 2 (Z) | Reverse direction (Z) | 4. Special Parameter Sections 4.1 Option Parameters (High Security – 0900 series) Do not change unless you have purchased a software option from Fanuc. | Param | Bit | Option | | :--- | :--- | :--- | | 0910 | Bit 0 | Custom Macro A / B | | 0911 | Bit 2 | Helical interpolation | | 0915 | Bit 7 | Rigid tapping (M29) | | 0917 | Bit 6 | AICC (High-speed machining) | | 0920 | Bit 1 | Graphic display | 4.2 PC (PMC) Parameters – 300 to 399 These control the built-in PLC (Programmable Logic Controller) logic for M-codes, T-codes, interlock signals, and coolant valves. Modifying these without ladder diagram documentation will break the machine. 5. How to Access Parameters (FANUC 11M)
Mode Switch: Set to MDI or EMERGENCY STOP (some parameters require PWE, but 11M uses an E-stop key for safe edit). Press Key: DGNOS/PARAM key repeatedly until PARAM screen appears. Search: Type parameter number (e.g., 0120) and press INPUT . To edit: The Fanuc 11M is a classic CNC control
Some parameters: Type new value → press INPUT . Bit parameters: Cursor to bit → type 1 or 0 → INPUT .
Servo parameters (0430+):
Turn off main breaker. Press and hold - and . keys while powering up (IPL monitor). Select "SERVO DISPLAY/SET". How to Access and Enable Parameter Editing Before
6. Common Problems & Solutions | Symptom | Likely Parameter Issue | | :--- | :--- | | Axis moves wrong direction | #0060 bits (polarity). | | Return to reference point is off | #012x (Grid shift) or mechanical switch position. | | RS-232 does not send/receive | #0310 (Baud), #0312 (Handshake), or cable pinout. | | 90-degree rapid move arcs slightly | Mismatched #014x (Position loop gain) across axes. | | Tool length offsets act funny | #0240 (Offset type: 0=absolute, 1=incremental). | | Emergency stop without pushbutton | #030x (Soft thermal, OT signals). | | CNC powers on but servos won't enable | #0800 (Sequence of servo-on signals). | 7. Critical Warnings
No PWE bit on 11M: Unlike later models (0/16/18), some 11M parameters are edited in E-stop, but you must cycle power for many changes. Battery loss: If CMOS backup battery (BR-2/3A or BR-2/3AE) fails, all parameters and programs are lost. Replace battery every 1–2 years with power ON. Backup procedure: Use RS-232 (DNC) to output all parameters: PUNCH → ALL → EXEC while in EDIT mode. Do not change SERVO parameters (0430-0549) unless you have factory servo tuning sheets – this can cause violent axis movement.