Fanuc alarm SV0458: CURRENT LOOP ERROR
αi/βi Servo (SV0xxx) · Fanuc 0i-D
What it means
The specified current loop differs from the actual current loop the amplifier is executing — a consistency check between configured and real current-control period failed. Typically caused by mismatched parameters after an amplifier swap, or an amplifier whose hardware runs a different period than configured. Align the current loop parameters with the installed amplifier's capability.
Likely causes
- Current loop period parameter mismatched after amplifier replacement
- Mixed amplifier types within one FSSB group with differing capabilities
- Corrupted or partially restored parameter set
Need the part urgently?
Send us alarm SV0458 with your machine details — typical RFQ turnaround is 24–48h.