Siemens SINAMICS G220 - Safe Stop 1 with Time Control (SS1-T)

Description of function
With Safe Stop 1 (SS1), the converter stops a dangerous movement of an electrically driven
machine component. After stopping, the Safe Torque O󹪜 (STO) function prevents the machine
component from restarting.
Table 14-90 Versions of the function
Abbreviation Brief description
SS1-t Safe Stop 1 with time control
SS1-a Safe Stop 1 with acceleration monitoring (SAM)
SS1-r Safe Stop 1 with braking ramp monitoring (SBR)
Example
Table 14-91 SS1 application example
Example Possible solution
A converter must brake a motor as quickly as pos‐
sible after the EMERGENCY STOP button has been
actuated. It is not permissible that the stationary
motor undesirably restarts.
Select SS1 via a failsafe digital input or via PROFI‐
safe.
14.12.4.3 Safe Stop 1 with time control (SS1-t)
Overview
With SS1‑t, the converter stops the motor along the OFF3 ramp within the set delay time. After
the delay time elapses, irrespective of the current speed, the converter activates the Safe Torque
O󹪜 (STO) function.
Functions
14.12Safety Integrated
SINAMICS G220 converter
662 Operating Instructions, 04/2024, FW V6.2, A5E51781573B AB