Siemens SINAMICS G120 Function Manual page 29

Application examples for the STO function
The STO function is suitable for applications where the motor is already at a standstill or will
come to a standstill in a short, safe period of time through friction. STO does not shorten the
run-on of machine components with high inertia.
Examples
When the Emergency Stop button is pressed, a
stationary motor should not unintentionally start.
A central emergency stop button must prevent the
unintentional acceleration of several motors that
are at a standstill.
Safety Integrated - SINAMICS G110M, G120, G120C, G120D and SIMATIC ET 200pro FC-2
Function Manual, 04/2014, FW V4.7, A5E34261271B AA
3.7 Safe Torque Off (STO)
Possible solution
Wire the Emergency Stop button to a
•
safety-related input of the inverter.
Select STO via the safety-related input.
•
Evaluate the Emergency Stop button in a
•
central control.
Select STO via PROFIsafe.
•
Description
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