A.C90 fault in Yaskawa Sigma 5 servo drive

Categories: Faults & Alarm

A.C90 Encoder Communications Error fault in Yaskawa Sigma 5 servo drive

Cause:

  • Contact fault of connector or incorrect wiring.
  • Cable disconnection, short-circuit, or incorrect impedance.
  • Corrosion (humidity/gas), intrusion of water/oil, or vibration affecting contacts.
  • Malfunction caused by noise interference.
  • A SERVOPACK fault occurred.

Remedy:

  • Re-insert connectors and confirm correct wiring.
  • Use cables with specified ratings.
  • Improve operating environment. Replace cable/SERVOPACK if necessary.
  • Separate linear scale cables from main circuit cables; check grounding.
  • Connect another SERVOPACK/Motor to test. If faulty, replace SERVOPACK.