Siemens SINAMICS S120 Function Manual page 233

Application example
After a power failure, a fan drive can be quickly reconnected to the running fan motor by
means of the "flying restart" function.
Figure 4-26
Figure 4-27
Drive functions
Function Manual, (FH1), 01/2013, 6SL3097-4AB00-0BP3
Flying restart, example of induction motor without encoder
ON
Flying restart, example of induction motor with encoder
Vector control
4.20 Flying restart
t
t
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