The Fanuc 0i-Model F Plus is the latest 0i-generation CNC — an enhanced 0i-F with the iHMI interface and faster processing. It uses the same modern letter-prefix alarm structure as the 0i-F and 30i/31i series. Below are the alarms seen most often, with causes and fixes.
0i-F Plus Alarm Prefixes
- PS — Program / setting alarms • SV — Servo • SP — Spindle
- OT — Overtravel • OH — Overheat • APC/DS — Encoder • SR — Serial
Common 0i-F Plus Alarms
| Alarm | Meaning | Common Cause & Fix |
|---|---|---|
| PS0000 | Please turn off power | Power-cycle a parameter change — switch OFF then ON. |
| PS0100 | Parameter write enable | Set PWE = 0 on the SETTING screen and press RESET. |
| PS0101 | Please clear memory | Power on holding RESET + DELETE after backing up parameters. |
| SV0401 | Servo amplifier VRDY OFF | Amp not ready — check DC link, E-stop, amp power & fault LED; repair/replace drive. |
| SV0410 / SV0411 | Excessive error (stop / move) | Bind, overload, low gain or amplifier/motor fault. |
| SV0417 | Illegal digital servo parameter | Restore servo parameters from backup; replace CNC battery A98L-0031-0025. |
| SV0436 | Soft thermal (OVC) | Overload/blocked cooling — check fans and load. |
| SV0445 / SV0447 | Encoder disconnect (soft / hard) | Check feedback cable; replace a faulty encoder. |
| OT0500 / OT0501 | Stroke limit + / − exceeded | Jog back inside travel and reset. |
| OH0700 | Control unit overheat | Check cabinet cooling fan and ambient temperature. |
| APC0300 / APC0301 | Reference return required / APC comms | Redo zero-return after a battery change; check encoder cable & battery. |
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Quick-reference of common alarms. For the complete list, refer to the Fanuc 0i-F Plus Maintenance Manual.