FANUC Series 0i-F / 0i-F Plus alarm SV0410: EXCESS ERROR (STOP)
SV0410 (EXCESS ERROR (STOP)) on a FANUC 0i-F means the positional deviation of an axis while it was stopped exceeded the limit set in parameter 1829. The axis was commanded to stand still but was pushed or drifted away from its position.
Diagnose this with AI
Try Free CNC Alarm Diagnostic Upload a keypad photo, the fault history or a parameter export from your FANUC Series 0i-F / 0i-F Plus. InduQT compares the evidence and suggests the next useful checks.
When it happens
- At standstill after a move
- At servo-on or E-stop release (gravity axis drops before holding)
- During a clamp, brake or fixture operation that loads the axis
Likely causes and checks
1Brake or gravity load on a vertical axis
- Points to it
- Only the vertical (gravity) axis alarms, typically at servo-on or E-stop release.
- Check
- Watch DGN 300 on that axis while enabling servo; check the motor brake releases and holds correctly and that any counterbalance is working.
2External force on a stopped axis
- Points to it
- Alarm coincides with a clamp, index or workpiece contact while the axis is holding.
- Check
- Repeat the operation and watch DGN 300; if it climbs during the clamp or contact, fix the mechanical interaction.
3Servo cannot hold position (amplifier, motor or feedback)
- Points to it
- Axis creeps or hunts at standstill; may come with SV0436 or Pulsecoder alarms.
- Check
- Check the power and feedback cables at the motor and amplifier, and watch for other servo alarms in the history.
4Limit set too tight
- Points to it
- Alarm appeared after a parameter or tuning change; DGN 300 at standstill sits close to the 1829 value.
- Check
- Compare 1829 with the machine builder’s parameter backup.
Telling it apart
- SV0411 is the same check while the axis is moving (parameter 1828); SV0410 is only at standstill.
- SV1072 and SV0474 are Dual Check Safety excess-error alarms with their own parameters (1839, 1842), not the 1829 limit.
Relevant parameters
| Parameter | Name | Why it matters |
|---|---|---|
| 1829 | Positioning deviation limit in the stopped state | Limit for SV0410. |
| DGN 300 (diagnosis) | Position error of each axis | Live position error in detection units. FANUC gives position error = feedrate [mm/min] × 100 / (60 × servo loop gain) × 1/detection unit, with servo loop gain from parameter 1825 in 0.01 s⁻¹. |
| 1825 | Servo loop gain for each axis | In 0.01 s⁻¹; FANUC lists 3000 as the usual value. Sets how much position error a given feedrate produces. |
Evidence to collect
- Which axis and whether it is vertical
- DGN 300 at standstill and at servo-on
- Brake and counterbalance condition
- Parameter 1829 compared with the builder’s backup
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