Extended Functions; Safe Stop 1 (Ss1, Time And Acceleration Controlled) - Siemens SINAMICS S120 Function Manual

Extended Functions

4.1

Safe Stop 1 (SS1, time and acceleration controlled)

General description
The "Safe Stop 1" function can be implemented to stop the drive in accordance with IEC
60204-1, stop category 1. After "Safe Stop 1" is set at the OFF3 ramp (p1135), the drive
brakes and changes to the Safe Torque Off (STO) status on expiration of the delay time
(p9356/p9556), or after having reached the shutdown speed (p9360/p9560).
Figure 4-1
Functional features of "Safe Stop 1"
● If SS1 is selected, the drive is brought to a stop along the OFF3 ramp (p1135) and
● The selection is realized through two channels - however braking along the OFF3 ramp,
Safety Integrated
Function Manual, (FHS) , 07/2007 Edition, 6SL3097-2AR00-0BP0
Sequence with SS1 selection
STO/SBC is automatically triggered on expiration of the delay time (p9356/p9556), or
after having reached the shutdown speed (p9360/p9560).
After the function has been activated the delay time runs - even if the function is de-
selected during this time. In this case, after the delay time has expired, the STO/SBC
function is selected and then again de-selected immediately.
only through one channel.
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