What the E1511 alarm means

The servo-side encoder battery assembly is below the alarm threshold; absolute zero data will be lost when the controller is powered off. This is one of the faults our repair team handles on Kawasaki E / F / C series (AS language) systems — the cause is usually identifiable within the first on-site inspection.

Most common causes

  • Battery assembly in the arm has reached end of life
  • Robot sat unpowered for a long period
  • Battery connector contact resistance
Field note: the first item on this list is what we find most often on real machines. Check it before you go deeper.

Step-by-step field fix

  1. Keep the controller powered until batteries are replaced
  2. Replace the encoder battery assembly in the arm
  3. Verify joint angle displays against mechanical scribe marks
  4. If angles are wrong, re-zero the affected joints before auto operation
  5. Beware: joints may only jog one direction when zero is lost — that is limit protection, not a drive fault
Safety first: never bypass safety circuits or force contactors closed. If the alarm involves E-stop chains, brakes or drive power, and you are not a trained robot technician, contact a professional — wrong moves here can cost you a robot or an injury.

Still stuck? Get an engineer on the phone — right now

Tell us the alarm code, the robot model and what was happening when the alarm came up. Our engineers run these diagnostics every day, and remote diagnosis by phone or video call is free.

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Hotline: +86-20-39029800 · WhatsApp: +86-188-1886-2860

Related Encoder & Position alarms

W1013 — Encoder Battery Voltage Low (Warning) E1029 — Encoder Revolution Count Abnormal (Axis XX) E1030 — Encoder Data Abnormal (Axis XX) E1033 — Encoder Line Error (Axis XX) E1516 — Encoder Data Abnormal (Multiple Joints) D1500 — Axis Encoder Read Error
Other brands: we also keep field-fix libraries for Staubli · Epson · Nachi and more — see the complete alarm code hub.

Frequently asked questions

QWhat does the Kawasaki E1511 alarm mean?

The servo-side encoder battery assembly is below the alarm threshold; absolute zero data will be lost when the controller is powered off. In field practice it belongs to the encoder & position family of faults.

QCan I clear a Kawasaki E1511 alarm myself?

Sometimes. Work through the step-by-step checks on this page — the first listed cause is what we find most often in the field. If the alarm returns after two attempts, or the fault involves power, brakes or safety circuits, stop and call a qualified robot service engineer.

QHow fast can a Henghuan engineer help?

On-site response in the Pearl River Delta within 30 minutes to 3 hours, across mainland China in 1-3 business days, and worldwide within 2-5 business days. Remote diagnosis by phone/WhatsApp/video is available immediately.

Written by the Henghuan Robotics repair team from field service experience. Alarm descriptions are our own summary for troubleshooting reference and may vary by controller and software version — when in doubt, check your Kawasaki documentation or contact us. Henghuan is an independent service provider, not affiliated with or endorsed by Kawasaki.