4 Configuration and Project Engineering 
4.3 Safe Torque Off (STO) 
 
SINAMICS G120 as a Speed Axis on the S7-1500 
V1.0a, Entry ID: 78788716 
 
Copyright  Siemens AG 2013 All rights reserved 
No.  Action  Picture 
1.    Enter the current password. 
Change the default password 
“0” of a factory new 
SINAMICS G120. 
Note: 
When resetting the safety 
parameters to factory 
settings, the assigned 
password remains. 
2.    Select the safety functionality. 
1.  Make sure that the safety 
commissioning is 
activated. 
2.  Navigate to the selection 
of the safety functionality. 
3.  Select the “Basic 
functions”. 
4.  Click on the “Control type 
/ safety functions” button. 
3.    Select control type and safety 
function. 
1.  Select the control type 
“via terminals” (default 
setting). 
2.  Click on the “STO” safety 
function (the only one 
available). 
4.    Output “STO active” 
On demand you can 
interconnect the “STO active” 
output. However, this is not 
necessary in this application.