Siemens Sinamics S110 Function Manual page 336

Safety Integrated Functions
8.2 General information about SINAMICS Safety Integrated
● Safety Integrated Extended Functions
The term "Motion Monitoring Functions" is also used for the Safety Integrated Extended
Functions.
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These functions require an additional Safety license. Extended Functions with encoder
require an encoder with Safety capability (see section "Reliable actual value acquisition
with the encoder system").
– Safe Torque Off (STO)
STO is a safety function that prevents the drive from restarting unexpectedly, in
accordance with EN 60204-1, Section 5.4.
– Safe Stop 1 (SS1, time and acceleration controlled)
The SS1 function is based on the "Safe Torque Off" function. This means that a
Category 1 stop in accordance with EN 60204-1 can be implemented.
– Safe Stop 2 (SS2)
The SS2 function brakes the motor safely with a subsequent transition to "Safe
Operating Stop" (SOS). This means that a Category 2 stop in accordance with EN
60204-1 can be implemented.
– Safe Operating Stop (SOS)
"Safe Operating Stop" (SOS) protects against unintentional movements. The drive is
in closed-loop control mode and is not disconnected from the power supply.
– Safely Limited Speed (SLS)
The SLS function ensures that the drive does not exceed a preset speed limit.
– Safe Speed Monitor (SSM)
The SSM function is used for safely identifying when a speed limit is undershot in both
directions of rotation, e.g. to identify zero speed. A fail-safe output signal is available
for further processing.
– Safe Acceleration Monitor (SAM)
The SAM function monitors the safe braking of the drive during the ramp down. An
unintentional "reacceleration" is reliably prevented. It is part of functions SS1 and SS2.
– Safe Brake Ramp (SBR)
The Safe Brake Ramp function provides a reliable method for monitoring the brake
ramp. It is part of the "SS1 without encoder" and "SLS without encoder" functions.
– Safe Direction (SDI)
The Safe Direction function provides a reliable method for monitoring the direction of
motion.
Function Manual, 01/2011, 6SL3097-4AB10-0BP3
Function Manual