Safe Torque Off (Sto) - Siemens SINAMICS S120 Function Manual

Overview of Safety Integrated functions
3.1 Safety Integrated Basic Functions
3.1.1

Safe Torque Off (STO)

Definition according to EN 61800-5-2:
"The STO function prevents energy from being
supplied to the motor, which can generate a
torque."
Examples of how the function can be used
Example
It is only permissible to open a protective door if the
motor torque has been switched off.
How does STO function in detail?
The converter recogniz-
es the selection ofSTO
via a fail-safe input or
via the safe communica-
tionPROFIsafe.
The converter then safe-
ly switches off the
torque of the connected
motor.
Details and parameterization
For further details and information on how to parameterize this function, refer to Chapter
"Safe Torque Off (STO) (Page 70)".
40
Possible solution
Select STO in the converter.
•
The pulses are suppressed and the motor
•
coasts to a standstill.
Function Manual, 12/2018, 6SL3097-5AR00-0BP1
Safety Integrated