If modifying 900 series options, a alarm will likely appear.
Diego opened the cabinet. Behind a taped plastic sleeve was a faded, coffee-stained sheet titled . At the bottom of the first page: “Parameter No. 900–939 option settings.”
This list covers the most common definitions for the Fanuc 0-T System Mate series. Note that "Bit" settings (0-7) are read from right to left. fanuc ot 900 parameter list
If you have a or 0T-TT (Twin Turret), the parameter list for the 900 range can differ significantly.
On a Fanuc OT, press DGNOS/PARAM → soft key right to PARAM → type 900 → INPUT. If you see zeros for everything, someone never set them – or you’ve just had a memory loss. If modifying 900 series options, a alarm will likely appear
Find the PWE (Parameter Write Enable) setting and change it from 0 to 1 . The CNC will typically trigger an alarm (e.g., P/S 100), which is normal. :
To restore parameters:
Enables canned cycles for drilling/boring (G80-G89). Bit 4 (THD): Enables thread cutting cycles (G76, G92).
Beyond the standard 900‑series option parameters, Fanuc 0‑series controls use additional parameters to manage stored in the 9000–9999 program number range. These hidden programs, often called "O9xxx" programs, are typically used for automatic tool changes (M6), pallet changers, probing routines, and other automated sequences. At the bottom of the first page: “Parameter No
FANUC supplied the OT control as a blank slate; lathe builders defined the 900 bits. Below are typical differences: