Fanuc alarm SV0305: APC ALARM: n-TH AXIS PULSE ERROR
0i-D servo APC alarm · Fanuc 0i-D
What it means
Mis-pulse (PMAL) detected in absolute position decoder transmission - corrupted pulse stream
Likely causes
- pulse coder defective
- shielding/ground defect on feedback line
- cable damage
Triage note: Re-route feedback away from motor power lines; recurring PMAL after cable checks = replace pulse coder
Replacement parts
We supply the following units for this alarm — tested, warranty-backed:
- View part →
A860-2000-T301
Pulse Coder (alpha iA1000) · Common cause
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A860-2050-T321
Pulse Coder (iA4000 class) · Common cause
Need the part urgently?
Send us alarm SV0305 with your machine details — typical RFQ turnaround is 24–48h.