Siemens SINAMICS S110 - Page 370

Safety Integrated Functions
8.5 Safety Integrated Extended Functions
Function Manual
368 Function Manual, 01/2011, 6SL3097-4AB10-0BP3
Brake ramp monitoring
The motor is immediately decelerated along the OFF3 ramp as soon as SS1 is triggered.
Monitoring is activated once the delay time in p9582/p9382 has elapsed. The drive is
monitored during braking to ensure the set brake ramp is adhered to. As soon as the speed
drops below the shutdown speed (p9560/p9360), safe monitoring of the brake ramp is
deactivated and safe pulse suppression (STO) is activated. If the set brake ramp (SBR) is
violated (exceeded), messages C01706 and C30706 are output and the drive is stopped with
STO (STOP A).
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Figure 8-4 Sequence for "Safe Stop 1" without encoder (p9506/p9306 = 1)
Parameterization of the brake ramp "without encoder"
p9581/p9381 and p9583/p9383 are used to set the steepness of the brake ramp (SBR).
Parameters p9581/p9381 determine the reference speed; parameters p9583/p9383 define
the ramp-down time from the reference speed to the value 0. Parameters p9582/p9382 are
used to set the time between the triggering of Safe Stop 1 and the start of brake ramp
monitoring.