Siemens alarm 300405: Axis %1 drive %2 unknown drive alarm, code %3
SINUMERIK 840D/810D powerline drive alarm (SIMODRIVE 611D) · SIMODRIVE 611D/611U
What it means
A 611D control board signalled an internal service number that the NCK firmware does not know, so it cannot be mapped to any numbered alarm. This points to software version skew between NCK and drive firmware, e.g. after a software update or after fitting a control module with mismatched firmware.
Likely causes
- NCK and drive software versions incompatible (module swapped from another machine generation)
- corrupted/incomplete drive firmware load after update
- genuine internal drive fault signalling an undocumented service code
Triage note: Always write down service code %3 - Siemens hotline needs it. First step is drive re-initialization and aligning drive/NCK software versions.
Replacement parts
We supply the following units for this alarm — tested, warranty-backed:
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6SN1118-…
control-board · Check if others ruled out
Need the part urgently?
Send us alarm 300405 with your machine details — typical RFQ turnaround is 24–48h.