Siemens SINAMICS S210 Operating Instructions Manual page 80

Safety functions integrated in the drive
4.1 Basic Functions
Flow diagram
Behavior
1
2
3
4
Settings
A
B
C
Selecting/deselecting "Safe Torque Off"
If "Safe Torque Off" is selected, the motor holding brake is closed (if connected and configured).
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● During operation, STO is selected via PROFIsafe and/or F-DI.
● After the response time, the drive immediately initiates safe pulse suppression.
This safely interrupts the torque-generating energy fed to the motor.
● The motor coasts down to a standstill.
● STO safely prevents the motor restarting.
● STO is deactivated by the drive with (manual or automatic program-controlled) deselection.
● The drive is again "ready for switching on".
● You restart the drive with a positive signal edge at ON/OFF1.
● STO is selected via the control bit of the selected PROFIsafe telegram or via the F-DI.
● The "STO_active" status is signaled in the status bit of the PROFIsafe telegram.
This value can be applied in the higher-level controller.
● The Safety error is acknowledged with selection/deselection of the STO function. Additional
information is provided in Chapter "Faults (Page 262)".
SINAMICS S210 servo drive system
Operating Instructions, 01/2019, A5E41702836B AC