Efficient Networks Siemens Sinamics S120 - Manual (Page 294)

Monitoring and protective functions
8.4 Stall protection (only for vector control)
Drive Functions
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Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4
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Figure 8-1 Block protection
Function diagrams (see SINAMICS S List Manual)
● 8012 Torque messages, motor blocked/stalled
Overview of key parameters (see SINAMICS S List Manual)
● p2175 Motor blocked speed threshold
● p2177 Motor blocked delay time
8.4 Stall protection (only for vector control)
Description
If, for closed-loop speed control with encoder, the speed threshold set in p1744 for stall
detection is exceeded, then r1408.11 (speed adaptation, speed deviation) is set.
If, in the low speed range (less than p1755 * p1756), the fault threshold value, set in p1745 is
exceeded, then r1408.12 is set (motor stalled).
If one of the two signals is set, then after the delay time in p2178, fault F7902 (motor stalled)
is output.