Fagor alarm 0004: Checksum error in PLC data
CNC 8060/8065/8070 CNC error · Fagor 8060/8065/8070
What it means
Detected at CNC startup: the plcdata.bin file holding PLC marks, counters, timers and register retentive data is missing, inaccessible or corrupt, so that retained PLC data is lost. One occurrence after an improper shutdown is usually benign; repeated errors point to storage problems. Recompile/restart the PLC program afterwards.
Likely causes
- power loss during a previous write of PLC data
- corrupt or deleted plcdata.bin on disk
- failing storage device (CF/SSD) in the central unit
Replacement parts
We supply the following units for this alarm — tested, warranty-backed:
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central-unit storage device (CF/SSD per model)
board · Common cause
Need the part urgently?
Send us alarm 0004 with your machine details — typical RFQ turnaround is 24–48h.