Siemens alarm F30835: Power unit DRIVE-CLiQ: Cyclic data transfer error
SINAMICS S120 drive fault · SINAMICS S120
What it means
CU and power unit fell out of synchronization on the cyclic DRIVE-CLiQ data exchange: the cyclic telegram was not received (21h), a receive-list timeout occurred (22h) or a send-list timeout (40h). After POWER ON the same component repeatedly reporting indicates real hardware trouble in that node's communication electronics.
Likely causes
- cyclic telegrams lost due to cable/contact defects
- node temporarily overloaded or hanging
- DRIVE-CLiQ component electronics failing intermittently
Replacement parts
We supply the following units for this alarm — tested, warranty-backed:
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6FX2003-… DRIVE-CLiQ cable
cable · Common cause
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6SL3121-… Motor Module (if node itself defective)
motor-module · Common cause
Need the part urgently?
Send us alarm F30835 with your machine details — typical RFQ turnaround is 24–48h.