Fanuc alarm SV0460: n AXIS: FSSB DISCONNECT
0i-D servo alarm (FSSB) · Fanuc 0i-D
What it means
FSSB optical communication to this amplifier dropped suddenly during operation
Likely causes
- optical fiber broken/kinked/dirty connector
- amplifier control power dropped momentarily
- amp low-voltage alarm cascade
Triage note: Fibers fail at bend points near cabinet doors - swap fibers between two axes; if alarm stays on same axis, the amp is dropping out
Replacement parts
We supply the following units for this alarm — tested, warranty-backed:
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A02B-0200-F311
FSSB Optical Fiber Cable · Primary suspect
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A06B-6134-H303
Servo Amplifier Unit (if amp browns out) · Common cause
Need the part urgently?
Send us alarm SV0460 with your machine details — typical RFQ turnaround is 24–48h.