Fagor alarm E305: Protocol error in the interface between power supply and drives
DDS drive display code (seven-segment; PS/XPS/RPS power supplies) · Fagor PS/XPS/RPS
What it means
Communication errors were detected between the power supply module and the drive modules across the shared internal bus. Fagor marks this error non-resettable: eliminate the cause and power the system down and up. Inspect the inter-module bus connectors/plates seating before swapping hardware.
Likely causes
- bus connector plate between modules loose or oxidized
- damaged bus links after module removal/refit
- power supply or drive communication controller failing
Replacement parts
We supply the following units for this alarm — tested, warranty-backed:
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DC bus / communication link plates between DDS modules
busbar · Common cause
Need the part urgently?
Send us alarm E305 with your machine details — typical RFQ turnaround is 24–48h.