What Is The Difference Between The Emergency Off And Emergency Stop Functions - Siemens SINAMICS S210 Operating Instructions Manual

Appendix
A.2 What is the difference between the Emergency Off and Emergency Stop functions?
A.2 What is the difference between the Emergency Off and Emergency
Stop functions?
"Emergency Off" and "Emergency Stop" are commands that minimize different risks in the
machine or plant.
Emergency Off
Risk of electric shock.
Table A-1
Command
Measure to minimize
risk
Classic solution
Solution with the
STO safety function
integrated in the
drive
548
Measures and solutions
Emergency Off
Safe switch off
Switching off the electric power supply
for the installation, either completely or
partially.
Switch off the power supply.
STO is not suitable for safely switching
off a voltage.
Emergency Stop
Risk of unexpected motion.
Emergency Stop
Safely stop and safely prevent restart‐
ing
Stopping or preventing the dangerous
movement
Switch off the drive power supply.
Select STO.
It is permissible that you switch off the
converter power supply as well. How‐
ever, switching off the voltage is not
required as a risk-reduction measure.
SINAMICS S210 servo drive system
Operating Instructions, 01/2019, A5E41702836B AC