Fanuc alarm SV0604: AMP. COMMUNICATION ERROR
αi/βi Servo (SV0xxx) · Fanuc 0i-D
What it means
Communication between the servo amplifier (SV) and common power supply (PS) modules failed. In multi-axis systems sharing one power supply, this internal serial link coordinates status and protection actions. Check the connecting cable between PS and SV modules and their seating; a failing communication section in either module produces recurring alarms.
Likely causes
- PS-SV interconnect cable loose or damaged
- Module not fully seated in the rack
- Communication interface failure in PS or SV module
Need the part urgently?
Send us alarm SV0604 with your machine details — typical RFQ turnaround is 24–48h.