Siemens Sinamics S110 Function Manual page 381

Restart after OFF2
If the drive has been switched off via OFF2/STO, the following steps need to be carried out
before a restart can be performed:
1st scenario:
● State after power-on: SLS selected, STO selected, OFF2 active
● Deselect STO.
● The drive enable must be given within 5 seconds via a positive edge at OFF1, otherwise
2nd scenario
● Situation: Run until standstill with SLS selected, then OFF2 activated
● Select STO
● Deselect STO.
● The drive enable must be given within 5 seconds via a positive edge at OFF1, otherwise
3rd scenario
● Situation: Run until standstill with SLS selected, then OFF2 activated
● Deselect SLS
● Select SLS
● After this the drive enable must be given by a positive edge at OFF1.
4th scenario
● Situation: All Safety Integrated functions are deselected
● After this the drive enable must be given by a positive edge at OFF1.
Parameterization of the brake ramp without encoder
p9581/p9381 and p9583/p9383 are used to set the steepness of the brake ramp.
Parameters p9581/p9381 define the reference velocity, parameters p9583/p9383 the ramp-
down time from the reference velocity down to a value of 0. Parameters p9582/p9382 are
used to set the time, which after changing over to a lower SLS velocity stage, elapses until
the braking ramp monitoring becomes effective.
Function Manual
Function Manual, 01/2011, 6SL3097-4AB10-0BP3
STO is reactivated.
STO activated internally via OFF2: This activation must be undone by
selection/deselection.
STO is reactivated.
STO activated internally via OFF2: This activation must be undone by
selecting/deselecting SLS.
Note
In the 4th scenario the motor is not reliably started.
Safety Integrated Functions
8.5 Safety Integrated Extended Functions
379