Siemens SIMODRIVE 611U Product Information page 88

Expert functions
5.8 Activating a brake
Fast stop (OFF3):
The drive is braked at the fast stop ramp (emergency stop). When the speed threshold is
reached, the holding brake is enabled which disables the pulse enable once the brake
closing time has elapsed.
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Connecting the SIMODRIVE 611U to the Technology CPU
Product Information, 03/2008, A5E00272066-05