Siemens SIMATIC S7-300 Product Information page 181

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.
Connection of the SINAMICS S120 to the Technology CPU
Product Information, 09/2011, A5E00480378-04
Expert Functions
5.8 Triggering of a brake
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