APC ALARM: NEED REF RETURN
Fanuc · Series 0i-MODEL F Plus Parameter
Was bedeutet DS0300 ?
This alarm indicates that the machine position and the position on the absolute position detector have become uncorresponding. This typically occurs when parameters related to rotary axis B type (e.g., parameter No. 1869) are set or when bit 4 (APZx) of parameter No. 1815 (indicating correspondence) is set to 0. The uncorrespondence is reflected in bit 0 of diagnosis data No. 310 and requires re-establishing the reference.
Häufige Ursachen
- The servo drive requires the home position to be re-established.
- Loss of reference point for axis positioning.
- Encoder index pulse not detected after power cycle.
- Manual intervention or homing routine failure.
Reparaturschritte & Checkliste
Klicken Sie auf Schritte, um Ihren Fortschritt zu verfolgen.
- 1
Establish the reference position again for the affected axis.
- 2
Check bit 4 (APZx) of parameter No. 1815 for the affected axis; it should be 0, indicating the need for a reference return.
- 3
Review diagnosis data No. 310, bit 0, to confirm the cause of uncorrespondence after parameter changes.