Safety Integrated Functions In Sinamics S120 Drive Systems - Siemens SIMATIC S7-300 Product Information

Safety Integrated Functions in
SINAMICS Drive Systems

6.2 Safety Integrated functions in SINAMICS S120 drive systems

6.2 Safety Integrated functions in SINAMICS S120 drive systems
The following Safety Integrated functions are available for SINAMICS S120:
● Basic functions
● Extended functions
Basic functions
These functions are part of the standard scope of the drive and can be used without
requiring an additional license:
● Safe Torque Off (STO)
● Safe Stop 1 (SS1, time controlled)
● Safe Brake Control (SBC)
Extended functions
The following functions are available in addition to the Basic functions:
● Safe Stop 1 (SS1, time and acceleration controlled)
● Safe Stop 2 (SS2)
● Safe Operating Stop (SOS)
● Safely-Limited Speed (SLS)
● Safe Speed Monitor (SSM)
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STO is a safety function that prevents the drive from restarting unexpectedly,
in accordance with EN 60204-1:2006 Section 5.4.
Safe Stop 1 is based on the "Safe Torque Off" function. This means that a Category 1
stop in accordance with EN 60204-1:2006 can be implemented.
The SBC function permits the safe control of a holding brake.
SBC is only supported by power/motor modules of the chassis model with the order
number ...3 or higher. Blocksize power modules also require a safe brake relay for this
function.
The function SS1 is based on the "Safe Torque Off" function. This means that a
Category 1 stop in accordance with EN 60204-1:2006 can be implemented. The drive
brakes after "Safe Stop 1" with OFF3 ramp (p1135) was selected and then goes into the
"Safe Torque Off" (STO) state on expiration of the delay time (p9356/p9556) or when
reaching the shutdown speed (p9360/p9560).
The SS2 function brakes the motor safely with a subsequent transition to
"Safe Operating Stop" (SOS).
The SOS function protects against unintentional motion. The drive is in closed-loop
control mode and is not disconnected from the power supply.
The "Safely-Limited Speed" (SLS) protects against excessively high drive speeds.
The SSM function safely monitors the speed limit and issues a safe output signal,
but without initiating a response function.
Connection of the SINAMICS S120 to the Technology CPU
Product Information, 09/2011, A5E00480378-04