Fanuc alarm SV0462: SEND CNC DATA FAILED
αi/βi Servo (SV0xxx) · Fanuc 0i-D
What it means
Because of an FSSB communication error, the slave (amplifier) side could not receive correct data from the CNC. Data integrity on the optical FSSB ring broke down mid-transfer. Inspect the optical fiber for kinks/dirt on ferrules, confirm both end connectors are fully clicked in, and check that amplifiers remain powered throughout the boot sequence.
Likely causes
- Optical FSSB cable damaged, kinked, or dirty ferrule
- Fiber not fully seated in connector
- Amplifier dropping offline momentarily during transfer
- Low-voltage condition on one amplifier disturbing the link
Need the part urgently?
Send us alarm SV0462 with your machine details — typical RFQ turnaround is 24–48h.