Fanuc alarm SV0302: APC ALARM: n-TH AXIS TIMEOUT ERROR
0i-D servo APC alarm · Fanuc 0i-D
What it means
Data transfer from pulse coder timed out - coder stopped responding within protocol window
Likely causes
- intermittent feedback cable break
- failing pulse coder electronics
- amplifier encoder interface port fault
Triage note: Try a known-good short feedback cable at the amp before condemning the encoder; timeouts favor cable/port over coder
Replacement parts
We supply the following units for this alarm — tested, warranty-backed:
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A06B-6134-K003
Encoder Feedback Cable Set (beta i) · Primary suspect
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A860-2020-T301
Pulse Coder (beta iA128 built-in) · Common cause
Need the part urgently?
Send us alarm SV0302 with your machine details — typical RFQ turnaround is 24–48h.