Fanuc Ot | 900 Parameter List

| Bit | Function | |------|-----------| | 7 | Grid shift for X axis | | 6 | Grid shift for Z | | 5 | Reference return direction: 0 = positive, 1 = negative | | 4 | Automatic grid shift on power-up | | 3 | Stroke limit 1 (hardware) enable | | 2 | Stroke limit II (software) enable | | 1 | Reference position shift (G28) | | 0 | Dogless reference return (absolute encoder) |

If your battery died and you have no backup, attempt this recovery sequence: fanuc ot 900 parameter list

---

| Param | Bit | Function | |-------|-----|----------| | 900 | 0 | Helical interpolation | | | 1 | Scaling | | | 2 | Coordinate system rotation | | | 3 | User macro A | | | 4 | User macro B | | | 5 | Mirror image | | | 6 | DNC (tape mode) | | | 7 | Custom macro (global variables) | | 901 | 0 | Additional work offsets (6 pairs) | | | 1 | Tool life management | | | 2 | Tool offset memory C (wear/geometry) | | | 3 | G68/G69 coordinate rotation (milling) | | | 4 | Polar coordinate interpolation | | | 5 | Cylindrical interpolation | | | 6 | Skip function (G31) | | | 7 | High-speed skip | | 902 | 0 | Constant surface speed (G96/G97) | | | 1 | Multiple repetitive cycles (G70–G76) | | | 2 | Pattern repeat | | | 3 | Chamfering/rounding | | | 4 | Helical (already 900.0) | | | 5 | Thread cycle (G92) multiple start | | | 6 | G32 thread cutting | | | 7 | G34 variable lead thread | | 903 | 0 | Automatic tool position compensation | | | 1 | Tool nose radius compensation (G41/G42) | | | 2 | Tool offset measure (touch setter) | | | 3 | Program restart | | | 4 | Manual absolute ON/OFF | | | 5 | External data input | | | 6 | Rigid tapping (requires spindle encoder) | | | 7 | Spindle synchronization | | 904 | 0 | Background editing | | | 1 | Graphic display (tool path) | | | 2 | Program number search | | | 3 | Sequence number compare/stop | | | 4 | Tape punch format (ISO/EIA) | | | 5 | 2nd spindle control | | | 6 | Tool offset B (32 pairs) | | | 7 | Tool offset C (99 pairs) | | 905 | 0 | High-speed machining (G08) | | | 1 | AI contour control (Fanuc 0TC) | | | 2 | Nano smoothing | | | 3 | Small diameter drill cycle | | | 4 | Polygon turning | | | 5 | 2-axis synchronous feed | | | 6 | 3-axis control (lathe with live tooling) | | | 7 | C-axis control | | 906 | 0 | Manual guide (conversational) | | | 1 | Data server | | | 2 | Ethernet | | | 3 | Remote buffer | | | 4 | High-speed DNC (5/10/20 msec) | | | 5 | Memory card | | | 6 | Floppy disk interface | | | 7 | PCMCIA adapter | | 907 | 0 | Spindle load meter (analog output) | | | 1 | Part counter (input signal) | | | 2 | Power outage recovery | | | 3 | Automatic power off | | | 4 | Operation time display | | | 5 | Clock function | | | 6 | Maintenance timer | | | 7 | Operator message (100–199) | | 908 | 0 | 4th axis (A-axis) | | | 1 | 2nd spindle (sub-spindle) | | | 2 | Tailstock control | | | 3 | Parts catcher control | | | 4 | Bar feeder interface | | | 5 | Chip conveyor control | | | 6 | Door interlock override | | | 7 | Safety zone (stroke check) | | 909 | 0 | High-speed skip (duplicate) | | | 1 | Probe calibration (Renishaw) | | | 2 | Tool breakage detection | | | 3 | Adaptive feedrate | | | 4 | Learning control | | | 5 | Feed forward | | | 6 | Backlash acceleration | | | 7 | Dual drive control (two motors one axis) | | Bit | Function | |------|-----------| | 7

---

| Bit | Name | Function | | :--- | :--- | :--- | | 0 | HLP | Help function (on-screen assistance) | | 1 | SCH | Schedule program (multi-job management) | | 2 | TAP | Tape mode editor | | 3 | LDP | Load / unload parameter (PMC ladder transfer) | | 4 | MDC | Manufacturing data capture (production counters) | | 5 | DRV | Driver monitor (servo waveform display) | | 6 | PRT | Parameter trace (diagnostic logging) | | 7 | ALM | Alarm history storage | | Param | Bit | Function | |-------|-----|----------|

If you are looking at a Fanuc 0T screen and see a string of zeros and ones starting at 900, you are looking at the DNA of the machine tool builder (MTB) configuration. Unlike standard machining parameters (speeds, feeds, rapid rates), the 900 series usually controls System Options.

Note: Always write down your current parameters before changing anything. One wrong bit can disable the spindle or cause the machine to freeze on startup.

Here is the logic of the 900 series.