Fanuc Ot 900 Parameter List «90% Fresh»
Never change the 900 parameters arbitrarily. If you enter an invalid combination, the control may display "ROM PARITY ERROR" or fail to boot.
Below are the primary option parameters for the 0-T control. Each parameter consists of 8 bits (labeled 7 to 0 from left to right). Description Canned Cycle (Basic) G10 Program Input of Offset Inch / Metric Conversion Special G Code Tape Memory Addition (120m) Chamfering / Corner Radius Multiple Repetitive Canned Cycles (G70-G76) Constant Surface Speed Control Stored Pitch Error Compensation Custom Macro A Actual Spindle Speed Output Number of Programs (Set to 125) Soft Keys Below CRT fanuc ot 900 parameter list
The FANUC OT 900 parameter list separates a working lathe from a paperweight. Unlike feed parameters (which you can guess and tune), the 900 series expects an exact binary configuration that matches: Never change the 900 parameters arbitrarily
: They manage physical machine capabilities, such as enabling the manual pulse generator (handwheel) for fine adjustments or expanding tape memory (Parameter 901) for larger program files. Each parameter consists of 8 bits (labeled 7
Load the remaining parameters (0–800+) via RS232 or manual entry. 💡 Troubleshooting Tips
When a customer purchased a new lathe, they paid for options. Fanuc provided the MTB (Machine Tool Builder) with a specific 8-bit binary code to enter into the 900s. When a machine changes hands, often these options are present but disabled in the parameters. Knowing the correct 900 parameter list can "unlock" dormant features already paid for by the original owner.
| Bit | Name | Function | | :--- | :--- | :--- | | 0 | MIN | Multiple repetitive cycles (G70-G76) – Standard on most, but can be disabled | | 1 | BCD | BCD/ Binary output (for custom PLC) | | 2 | PRF | Program format (FS10/11 format for macro) | | 3 | PRO | Program number search (Oxxxx search) | | 4 | BPT | Background edit (edit while running another program) | | 5 | EVS | Extended custom macro variables (#500–#999) | | 6 | CIX | Composite / canned cycle for X axis | | 7 | MAC | (G65, G66) – Essential for parametric programming |
