Siemens alarm 300610: Axis %1 drive %2 rotor position identification failed
SINUMERIK 840D/810D powerline drive alarm (SIMODRIVE 611D) · SIMODRIVE 611D/611U
What it means
Rotor position could not be determined from measurement signals (current-based rotor position identification failed).
Likely causes
- phase missing in motor-converter connection
- weak DC link (loose DC-link screws / missing bus voltage)
- Uce monitoring latched (reset by power cycle)
- defective 611D power section
- defective control module
Triage note: Official remedy ladder ends with: 'Replace the 611D power section' then 'Replace the control module'.
Replacement parts
We supply the following units for this alarm — tested, warranty-backed:
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6SN1123-…
SIMODRIVE 611D power section (power module) · Primary suspect
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6SN1118-…
SIMODRIVE 611D control board · Common cause
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6FX2003-…
DC-link/bus connections (torque check before swap) · Check if others ruled out
Need the part urgently?
Send us alarm 300610 with your machine details — typical RFQ turnaround is 24–48h.