Safe Stop 1 (Ss1) - Siemens SINUMERIK Series Function Manual

Overview of Safety Integrated functions
2.2 Safety Integrated Basic Functions
2.2.2

Safe Stop 1 (SS1)

Definition
Definition according to EN 61800-5-2:
"The function SS1 brakes the motor and trips the function STO after a delay time."
Select SS1
Example of how the function can be used
● For an Emergency Stop, a drive must be braked as quickly as possible, and then
transitioned into STO.
How does SS1 function in detail?
The drive decelerates once "Safe Stop 1" has been selected, and goes into the "Safe Torque
Off" state once the delay time has expired.
Select SS1
As soon as the inverter detects the selection of SS1 via a terminal, 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 inverter brakes the motor with the
AUS3 ramp-down time. STO is automatically initiated after the time expires.
28
STO
Function Manual, 10/2015, 6FC5397-3EP40-5BA3
Safety Integrated