SRVO-005: Robot overtravel
An axis tripped its hardware limit switch - the physical last line of defense past the software limits.
What it means
An axis tripped its hardware limit switch - the physical last line of defense past the software limits. Also appears on robots fresh off the truck: FANUC ships them deliberately set in an overtravel state for transit, so this alarm on a new install is usually normal.
Common causes
Ranked by what technicians most often find, most likely first.
- New robot still in its shipping overtravel state.
- An axis actually driven past its software limits into the hardware switch (bad mastering, wrong limits, or a crash).
- Faulty limit switch or wiring if no axis is anywhere near its limit.
How to fix it
- Hold SHIFT and press RESET to clear the alarm.
- Keep holding SHIFT and jog the offending axis back into its working range - note jogging is restricted to the direction away from the tripped limit.
- On uncalibrated robots, the OT release screen (SYSTEM > OT release) lifts that jog restriction.
- If it won't reset with all axes clearly in range, suspect the switch or wiring per the maintenance manual.
Quick facts
- Category
- Servo
- Affected series
- R-30iB; R-30iB Mate; R-30iB Plus; R-30iB Mate Plus
- Alarm family
- SRVO