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.
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: fanuc ot 900 parameter list