What the E1029 alarm means

The multi-turn revolution counter of the absolute encoder reports an impossible value; position tracking for the axis is unreliable. Our engineers run into this alarm every week on Kawasaki E / F / C series (AS language) controllers, and a single on-site inspection usually identifies the problem.

Most common causes

  • Encoder battery was dead or removed with power off
  • Electrical noise corrupting the encoder signal
  • Encoder hardware fault
  • Loose encoder cable connection
Field note: In our repair stats the first cause has the highest hit rate, so confirm it first before digging further.

Step-by-step field fix

  1. Check the encoder battery voltage and replace if low
  2. Reseat and inspect the encoder cable
  3. Power-cycle and see if the count recovers
  4. If the error persists, zero the axis at the mechanical scribe mark
  5. Replace the encoder if the counter fails again
Safety first: For Kawasaki e1029, 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. The self-serviceable action is Check the encoder battery voltage and replace if low; anything past that falls under position feedback and brake release and needs a certified engineer.

How we diagnose encoder alarms on site

Kawasaki e1029 belongs to the encoder & position family. On Kawasaki e1029 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 e1029 at the pendant ERROR HISTORY with AS error numbers (D / E / P prefixes).

The chain involved in Kawasaki e1029 runs: motor-side encoder -> encoder cable -> drive / measuring board acquisition -> position count and zero data -> battery-held memory.

If Kawasaki e1029 shows Encoder battery was dead or removed with power off 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 e1029 (Encoder Revolution Count Abnormal (Axis XX)); written by the Henghuan repair team, updated 2026-10-01.

Not sure? Don't force it — contact an engineer

Share the alarm code, machine model and the operating condition at the moment of the alarm. Our engineers are highly experienced with Kawasaki e1029, and remote diagnosis (phone/video) is completely free.

Get a Free Remote Diagnosis See Repair Services

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

Related Encoder & Position alarms

W1013 — Encoder Battery Voltage Low (Warning) E1030 — Encoder Data Abnormal (Axis XX) E1033 — Encoder Line Error (Axis XX) E1511 — Encoder Battery Voltage Low [Servo] E1516 — Encoder Data Abnormal (Multiple Joints) D1500 — Axis Encoder Read Error
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 e1029 alarm mean?

The multi-turn revolution counter of the absolute encoder reports an impossible value; position tracking for the axis is unreliable. Our engineers run into this alarm every week on Kawasaki E / F / C series (AS language) controllers, and a single on-site inspection usually identifies the problem. Kawasaki e1029 sits in the encoder & position family; on our work orders the highest-frequency trigger for this code is "Encoder battery was dead or removed with power off".

QCan I clear a Kawasaki e1029 alarm myself?

Whether Kawasaki e1029 clears on its own depends on the outcome of "Check the encoder battery voltage and replace if low". Finish the flow with "Replace the encoder if the counter fails again" to confirm Kawasaki e1029 - do not skip it. If that step is clean, the second most frequent cause on Kawasaki e1029 is "Electrical noise corrupting the encoder signal". When Kawasaki e1029 keeps coming back it is not a one-off trigger - especially if Replace the encoder if the counter fails again is where you get stuck. Do not keep producing through Kawasaki e1029.

QFor encoder alarms like Kawasaki e1029, can it be fixed in one visit?

The commonest causes we see on Kawasaki e1029 are "Encoder battery was dead or removed with power off, Electrical noise corrupting the encoder signal, Encoder hardware fault", so we stock the van against those. For Kawasaki e1029 specifically, we carry feedback-path parts: encoder cables, battery packs, connector pins and the measuring-board type data for the brand. For Kawasaki e1029, 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 e1029 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.

The content on Kawasaki e1029 was written by Henghuan Robotics service engineers from hands-on repair experience. Alarm descriptions are our own reference summary and may differ by controller or software version — defer to Kawasaki documentation, or contact us to confirm. Henghuan is an independent service provider with no affiliation or endorsement by Kawasaki.