Safety Integrated Extended Functions - Siemens SINAMICS S120 Function Manual

2.1.2

Safety Integrated Extended Functions

The Safety Integrated Extended Functions require an additional Safety Extended license.
Extended Functions with encoder require an encoder with safety capability (see Chapter
"Notes regarding safe actual value sensing using an encoder system (Page 155)").
● Safe Torque Off (STO)
Safe Torque Off is a safety function to avoid unexpected starting in accordance with
EN 60204-1.
● Safe Stop 1 (SS1, time and acceleration 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)
Safe Brake Control is used to safely control a holding brake.
● Safe Operating Stop (SOS)
Safe Operating Stop is used to protect against unintentional movement. The drive is in
closed-loop control mode and is not disconnected from the power supply.
● Safe Stop 2 (SS2)
Safe Stop 2 is used to safely brake the motor with a subsequent transition into the "Safe
Operating Stop" state (SOS). This means that a Category 2 stop in accordance with EN
60204-1 can be implemented.
● Safely-Limited Speed (SLS)
Safely-Limited Speed ensures that the drive does not exceed a preset speed/velocity
limit.
● Safe Speed Monitor (SSM)
Safe Speed Monitor is used for safely identifying when a speed limit is undershot in both
directions of motion, e.g. to identify zero speed. A failsafe output signal is available for
further processing.
● Safe Direction (SDI)
Safe Direction is used to safely monitor the direction of motion.
● Safe gearbox stage switchover
The "Safe gearbox stage switchover" function facilitates reliable switching between
different gearbox stages. The switchover is only possible via PROFIsafe.
● Safely-Limited Acceleration (SLA)
Safely-Limited Acceleration monitors (the same as SLS) the acceleration, and intervenes
when a limit value is violated. SLA cannot prevent that the acceleration threshold is briefly
exceeded.
● Safe Brake Test (SBT)
The diagnostic function "Safe Brake Test" function (SBT) checks the required holding
torque of a brake (operating or holding brake).
Safety Integrated
Function Manual, 12/2018, 6SL3097-5AR00-0BP1
General information about SINAMICS Safety Integrated
2.1 Supported functions
1) 2)
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