4.2 SS1 Basic:
Definition according to EN 61800-5-2:
"The SS1 function brakes the motor and in‐
itiates the STO function after a delay time."
Example of how the function can be used
Example Possible solution
A central Emergency Stop button ensures that sev‐
eral drives are braked as quickly as possible and
brought into the STO state.
● Evaluating an Emergency Stop pushbutton
in an F-PLC
● Select SS1 via PROFIsafe.
How does SS1 function in detail?
Overview
The drive decelerates once "Safe Stop 1" has
been selected, and goes into the "Safe Torque
Off" state once the delay time has expired.
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Select SS1
As soon as the converter identifies that SS1 has been selected via a terminal or via PROFIsafe
safe communication, the following happens:
● If, when selecting SS1, the motor is already switched off, then until the SS1 delay time
expires, there is no response. STO becomes active after the time expires.
● If the motor is switched on when SS1 is selected, the converter brakes the motor with the
OFF3 ramp-down time. STO is automatically initiated after the delay time has expired.
Safety functions integrated in the drive
4.2 SS1 Basic:
Safety Integrated (with SINAMICS S120)
94 Commissioning Manual, 02/2020, A5E46305916B AB
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