8476

Category: Alarm

Cause

1. Momentary drop in supply voltage
2. Power was switched off during parameter writing
3. The number of parameter writes exceeded the maximum
4. Malfunction caused by noise from the AC supply, grounding, static electricity, etc.
5. Gas, water droplets, cutting oil, etc. caused component failure inside the servo unit
6. Servo unit fault

Corrective action

1. Measure the supply voltage and confirm the power-off duration: Set the supply voltage within the specified range and initialize parameter settings (Fn005).
2. Measure the supply voltage and confirm the power-off duration: Initialize parameter settings (Fn005), then enter the parameters again.
3. Confirm whether the host device changes parameters frequently: The servo unit may be faulty. Replace the servo unit. Change the parameter writing method.
4. If the alarm persists after repeatedly powering on, noise may be the cause: Take measures against noise interference.
5. Check the installation environment: The servo unit may be faulty. Replace the servo unit.
6. If the alarm persists after repeatedly powering on, a fault may have occurred. The servo unit may be faulty. Replace the servo unit.