Siemens alarm 300513: Axis %1, drive %2 ground fault detected
SINUMERIK 840D/810D powerline drive alarm (SIMODRIVE 611D) · SIMODRIVE 611D/611U
What it means
Firmware ground-fault detection measured phase currents beyond threshold MD 1167 $MD_CURRENT_GROUND_IDENT, or shaft movement beyond MD 1168 during the test. This means leakage to protective earth somewhere in the motor circuit; detailed diagnostics land in MD 1169 $MD_DIAG_MOTORIDENT.
Likely causes
- ground fault in motor winding (moisture, insulation breakdown)
- damaged/chafed motor power cable or connector
- coolant ingress in motor connector
- genuinely asymmetric current measurement (false trip) - verify with MD 1169 detail
Triage note: Megger the motor and cable separately to split motor vs cable; read MD 1169 before parts-swapping.
Replacement parts
We supply the following units for this alarm — tested, warranty-backed:
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6FX5002-… / 6FX6002-… (MOTION-CONNECT power)
cable · Common cause
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1FT6/1FK/1PH… motor
power-module · Common cause
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6SN1123-…
power-module · Check if others ruled out
Need the part urgently?
Send us alarm 300513 with your machine details — typical RFQ turnaround is 24–48h.