Siemens SINAMICS S200 - Functional Features of STO

④ Signal change at
ON/OFF1 from 1 t
o
0
• The converter is ready to start again.
⑤ Signal change at
ON/OFF1 from 0 t
o
1
• The motor starts again.
Example
Applications include all machines and systems wit
h moving axes (for example, conveyor
technology, handling).
With STO, maintenance work on the machine with an open protective door is possible, for
example. An EMERGENCY STOP with electromechanical disconnection is not required. The
drive remains connected to the line power supply and can be fully diagnosed.
Parameters
The following list includes the parameters of the "Safe Torque O󹪜 (STO)" function.
Number Name Unit
r9722.0...7 SI status signals 
9.8.5.2 Functional features of STO
Overview
The ST
O function is enabled by default and it is active with speci󹪝ed default settings. No
additional settings are required.
Description of function
A stop function for Emergency Stop via X131 terminal is de󹪝ned and is permanently assigned.
You can use the provided STO plug to connect the external safety device, for example, an
EMERGENCY STOP button.
If you do not want to use the STO function, insert the provided STO disable plug into the
X131 socket to disable the STO function.
More information
For more information about the terminal description and terminal wiring, see Section
"Connecting STO (for S200 PTI only) (Page161)".
Functions
9.8Safety Integrated (for S200 PTI only)
SINAMICS S200 pulse train servo drive system with SIMOTICS S-1FL2
Operating Instructions, 11/2023, FW V6.3, A5E51646767B AA 287