Siemens SINAMICS SIMOTICS S200 PROFINET Operating Instructions Manual page 404

Functions
10.7 Safety Integrated (for S200 PN only)
Requirement
Unexpected motor movement through active Safe Torque Off
There may be unexpected motor movements if the Safe Torque Off (STO) function is active. For
instance, the motor can coast down to a standstill or a hanging load may accelerate the motor.
Unexpected movements can lead to damage to property, risk to persons, severe injury and
death.
• Take account of the way the Safe Torque Off (STO) function works when you perform risk
• Prevent movements of the motor, for example by using a holding brake.
The STO function is enabled.
Description of function
Figure 10-19
①
②
③
402
WARNING
assessments of the machine or system.
Flow diagram STO
Action
Selection of STO
•
•
•
•
•
Deselection of STO •
Motor/converter response
The converter detects selection of STO and signals the status "STO active"
(r9722.0).
The converter interrupts the torque-generating energy feed to the motor.
If you use a line contactor, the converter opens the line contactor.
The "switching on inhibited" status prevents the motor from restarting
automatically.
The motor coasts down to a standstill.
The converter detects deselection of STO.
SINAMICS S200 PROFINET servo drive system with SIMOTICS S-1FL2
Operating Instructions, 11/2023, FW V6.3, A5E51646752B AB