Efficient Networks Siemens Sinamics S120 - Manual (Page 302)

Safety Integrated basic functions
9.1 General information
Drive Functions
302
Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4
– 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.
Note
When a drive object that has Safety Integrated functions released is switched to
"Parking" mode, the Safety Integrated software responds by activating STOP without
generating a separate message.
– Safe Stop 1 (SS1, time controlled)
Safe Stop 1 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 Brake Control (SBC)
The SBC function permits the safe control of a holding brake.
SBC is not supported by chassis components. Power Modules Blocksize also require
a Safe Brake Relay for this function.
● Safety Integrated extended functions
– 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
Operational Stop" (SOS).
– Safe Operational Stop (SOS)
"Safe Operational 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 "Safely Limited Speed" (SLS) protects against excessively high drive speeds.
– Safe Speed Monitor (SSM)
The SSM function reliably monitors the speed limit and issues a safe output signal, but
without a response function.
Prerequisites for the extended functions
● An appropriate license
● Activation via PROFIsafe or TM54F
NOTICE
Per single Control Unit, either control via PROFIsafe or TM54F is permitted. Mixed
operation is not permitted.
● SINAMICS S120: FW version from 2.5 SP1