position of each servo axis on the FSSB (Fanuc Serial Servo Bus) when using manual configuration
: The reference position has not been established. The machine will usually display a "ZRN Needed" (Zero Return Needed) alarm. fanuc parameter 1860 work
If the machine has linear scales (glass scales) mounted on the axis itself: position of each servo axis on the FSSB
: The zero point is not established . This usually occurs after replacing a battery (resulting in a "300 APC Alarm") or after a motor/encoder replacement. fanuc parameter 1860 work