Siemens Sinamics S120 Function Manual page 46

Overview of Safety Integrated functions
3.2 Safety Integrated Extended Functions
Det ailed description
The fail-safe logic (e.g. F-CPU) selects the SS2 safety function via a fail-safe input or via the
PROFIsafe safe communication.
● If, when selecting SS2, the motor is already at a standstill, after a delay time, the
converter activates the Safe Operating Stop function (SOS).
● If the drive is not at standstill when SS2 is selected, it is braked along the OFF3 ramp.
Braking is monitored with one of the following functions, depending on the setting in
p9506:
– "Safe Acceleration Monitor (SAM)"
– "Safe Brake Ramp (SBR)"
After a delay time, the converter activates the Safe Operating Stop function (SOS). This
function monitors the safe standstill of the drive.
B raking behavior
Image 3-4
46
A faulty acceleration is therefore detected.
In this way, a violation of the braking ramp is detected.
Braking behavior and diagnostics of the safety function SS2 (example of SS2 with SAM)
Function Manual, (FHS), 07/2016, 6SL3097-4AR00-0BP6
Safety Integrated