Fanuc alarm SV0361: PULSE CODER PHASE DATA ABNORMALITY (BUILT-IN)
0i-D servo alarm (built-in pulse coder) · Fanuc 0i-D
What it means
Phase data (fine-division interpolation table) from the built-in coder is invalid
Likely causes
- pulse coder internal defect (LED/disc contamination)
- coder shock damage
- serial data corruption from cable
Triage note: Power-cycle once; repeat = coder replacement. On integral-motor models this becomes a motor exchange
Replacement parts
We supply the following units for this alarm — tested, warranty-backed:
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A860-2000-T301
Pulse Coder (alpha iA1000) · Primary suspect
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A860-2050-T321
Pulse Coder (alpha iS class) · Common cause
Need the part urgently?
Send us alarm SV0361 with your machine details — typical RFQ turnaround is 24–48h.