Safety Integrated Basic Functions; Safe Torque Off (Sto) - Siemens SINAMICS S120 Function Manual

Description of Safety Integrated functions

4.1 Safety Integrated basic functions

4.1 Safety Integrated basic functions
Note
Basic Functions do not require an encoder
The Safety Integrated Basic Functions are functions for safely stopping the drive. You do not
require an encoder.
Note
Application of the Basic Functions
Basic Functions are available in all control modes with and without encoder for synchronous
and induction motors without any restrictions.
Note
Control via TM54F
If you want to control the Safety Integrated Basic Functions via TM54F, set p9601.6 = 1.
Note
PFH values
The PFH values of the individual SINAMICS S120 safety components can be found at:
PFH values (https://support.industry.siemens.com/cs/ww/en/view/76254308)
4.1.1

Safe Torque Off (STO)

In conjunction with a machine function or in the event of a fault, the "Safe Torque Off" (STO)
function is used to safely disconnect the torque-generating energy supply to the motor.
A restart is prevented by the two-channel pulse suppression. The switching on inhibited
prevents an automatic restart after deselection of STO.
The two-channel pulse suppression function integrated in the Motor Modules / Power
Modules is the basis for this function.
Functional features of "Safe Torque Off"
● The function is completely integrated in the drive. It can be selected via terminals, TM54F
or PROFIsafe from an external source.
● The function is drive-specific, i.e. it is available for each drive and must be individually
commissioned.
● The function must be enabled via parameter.
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Function Manual, 12/2018, 6SL3097-5AR00-0BP1
Safety Integrated