Siemens alarm F31835: Encoder 1 DRIVE-CLiQ: Cyclic data transfer error
SINAMICS S120 encoder fault (Sensor Module / DRIVE-CLiQ encoder) · SINAMICS S120
What it means
The cyclic DRIVE-CLiQ exchange with this encoder lost synchronization: cyclic telegram not received (21h), receive-list timeout (22h) or send-list timeout (40h). For encoders the reaction is typically ENCODER (traverse to standstill) rather than full OFF2. Repeated occurrence after POWER ON implicates the encoder's communication electronics, its cable branch, or the socket it hangs on.
Likely causes
- DRIVE-CLiQ cable/branch box contact or cable defect
- encoder-integrated DRIVE-CLiQ interface failing
- EMC disturbances below fault level accumulating to sync loss
- topology/socket overload
Replacement parts
We supply the following units for this alarm — tested, warranty-backed:
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6FX2003-… DRIVE-CLiQ cable
cable · Common cause
Need the part urgently?
Send us alarm F31835 with your machine details — typical RFQ turnaround is 24–48h.