What the D1500 alarm means

The controller cannot read the axis encoder at all; with a D-level encoder error the controller must be power-cycled and the axis position is suspect. We are very familiar with this alarm on Kawasaki E / F / C series (AS language) systems — usually the first on-site inspection is enough to confirm the cause.

Most common causes

  • Failed encoder
  • Severed or shorted encoder harness
  • Encoder interface board fault
  • Severe noise event
Field note: Our ticket data shows the first cause is by far the most common — start there to avoid dead ends.

Step-by-step field fix

  1. Power-cycle the controller
  2. Reseat and test the encoder harness for the axis
  3. Swap-test the encoder
  4. After repair, zero ALL affected axes at scribe marks before auto mode
  5. Run a check-mode playback of key programs to confirm positions
Safety first: For Kawasaki d1500, encoder alarms often mean position data cannot be trusted: actual pose may disagree with the system record, so releasing a brake or jogging carries unexpected-motion risk. On site you may look at after confirming power-off the first step yourself: Power-cycle the controller. Beyond that it is position feedback and brake release work - leave it to a professional.

How we diagnose encoder alarms on site

Kawasaki d1500 belongs to the encoder & position family. On Kawasaki d1500 the failing stage is encoder boards acquire absolute or incremental feedback per model; a battery holds zero on the E-Controller / D-Controller / F-Controller - the feedback path: encoder body, encoder cable, battery, measuring board and the stored position memory. We start reading Kawasaki d1500 at the pendant ERROR HISTORY with AS error numbers (D / E / P prefixes).

The chain involved in Kawasaki d1500 runs: motor-side encoder -> encoder cable -> drive / measuring board acquisition -> position count and zero data -> battery-held memory.

If Kawasaki d1500 shows Failed encoder and tracks arm pose, the hard case arrives: Encoder cables flexing in a drag chain fatigue their copper cores: open at one pose, conducting at another. This is the nastiest to reproduce because it is intermittent. We jog the suspect axis near the pose recorded at alarm time and measure continuity while moving, watching the feedback for jumps. If the cable in that chain is past its rated bend count, we recommend replacing the whole run rather than splicing, even when this repair holds.

Field notes on this page cover Kawasaki d1500 (Axis Encoder Read Error); written by the Henghuan repair team, updated 2026-10-01.

Blocked by this alarm? We can help you analyze it over the phone

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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) E1511 — Encoder Battery Voltage Low [Servo] E1516 — Encoder Data Abnormal (Multiple Joints)
Same family: this code belongs to the Encoder & position alarms family - the page collects all Encoder & position-family codes we have handled, with the common inspection order and spares.
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 d1500 alarm mean?

The controller cannot read the axis encoder at all; with a D-level encoder error the controller must be power-cycled and the axis position is suspect. We are very familiar with this alarm on Kawasaki E / F / C series (AS language) systems — usually the first on-site inspection is enough to confirm the cause. Kawasaki d1500 sits in the encoder & position family; on our work orders the highest-frequency trigger for this code is "Failed encoder".

QCan I clear a Kawasaki d1500 alarm myself?

Whether Kawasaki d1500 clears on its own depends on the outcome of "Power-cycle the controller". Finish the flow with "Run a check-mode playback of key programs to confirm positions" to confirm Kawasaki d1500 - do not skip it. If that step is clean, the second most frequent cause on Kawasaki d1500 is "Severed or shorted encoder harness". Do not chase takt through a repeating Kawasaki d1500. Left alone, encoder & position faults tend to graduate from repairable to must-replace.

QFor encoder alarms like Kawasaki d1500, can it be fixed in one visit?

The commonest causes we see on Kawasaki d1500 are "Failed encoder, Severed or shorted encoder harness, Encoder interface board fault", so we stock the van against those. For Kawasaki d1500 specifically, we carry feedback-path parts: encoder cables, battery packs, connector pins and the measuring-board type data for the brand. For Kawasaki d1500, encoder alarms are mostly broken cores and dead batteries, both of which ride in the van, so most clear in one visit. Before we roll, tell us what Kawasaki d1500 shows on the pendant ERROR HISTORY with AS error numbers (D / E / P prefixes) and what the machine was doing - phone or video triage is free.

This page on Kawasaki d1500 is based on the field experience of the Henghuan Robotics repair team. Alarm explanations are our own summary for troubleshooting reference and may differ across controller and software versions — if unsure, verify against Kawasaki documentation or reach out to us. Henghuan is an independent service provider with no affiliation or endorsement by Kawasaki.