Fanuc alarm STATUS1:b1 (- on STATUS2): Converter control power supply voltage decrease
αi/βi SVPM · Fanuc αi/βi SVPM
What it means
STATUS1 code b1 with '-' steady on STATUS2 indicates the control power supply voltage of the βi SVPM converter section decreased, reported as SP9111. Often accompanies a marginal incoming control feed or internal SMPS trouble.
Likely causes
- Low or unstable 200 V control tap input
- Internal control power supply (SMPS) degradation
- Loose CXA2C control power connector
Replacement parts
We supply the following units for this alarm — tested, warranty-backed:
- Request a quote →
A06B-6134-Hxxx / A06B-6230-Hxxx (SVPM)
amplifier · Check if others ruled out
Need the part urgently?
Send us alarm STATUS1:b1 (- on STATUS2) with your machine details — typical RFQ turnaround is 24–48h.