Fanuc alarm SP9016: SERIAL SPINDLE AL16: RAM EXCEPTION
spindle alarm (serial spindle, alpha i) · Fanuc 0i-D
What it means
RAM used for external/spindle data inside SPM control board abnormal
Likely causes
- SPM control printed circuit board failure
- memory device end-of-life
Triage note: Control-board-only swap possible on some SPM revisions, but full SPM exchange is the low-risk downtime play
Replacement parts
We supply the following units for this alarm — tested, warranty-backed:
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A20B-8201-0190
SPM Control PCB (alpha iSP) · Common cause
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A06B-6202-H222
Spindle Amplifier Module (full SPM exchange) · Primary suspect
Need the part urgently?
Send us alarm SP9016 with your machine details — typical RFQ turnaround is 24–48h.