Safety Integrated Extended Functions; Parking Note; Safe Torque Off (Sto); Safe Torque Off With Encoder - Siemens SINAMICS S120 Function Manual

Safety Integrated Extended Functions

5.1

Parking note

Note
When a drive object for which Safety Integrated Extended Functions are enabled is switched
to "Park" mode, the Safety Integrated software responds by selecting STO without
generating a separate message. This internal STO selection is displayed in parameter
r9772.19.
5.2

Safe Torque Off (STO)

5.2.1

Safe Torque Off with encoder

In addition to the control options, specified under Safety Integrated Basic Functions, "Safe
Torque Off (STO) with encoder" can also be controlled via TM54F under Safety Integrated
Extended Functions.
The functionality of "Safe Torque Off (STO) with encoder" is described in Chapter, "Safety
Integrated basic functions".
5.2.2

Encoderless Safe Torque Off

Safe Torque Off without encoder
If an induction motor is being used, Safe Torque Off (STO) can also be used without an
encoder.
Function
Set p9306 = p9506 = 1 (factory setting = 0) to activate encoderless Safety Integrated
functions. You can also make this setting by selecting "Without encoder" on the safety
screen.
Difference between Safe Torque Off with and without an encoder
Depending on whether or not it has an encoder, STO demonstrates different restart behavior
in terms of SLS after STO/OFF2 (see the "Encoderless SLS Safely-Limited Speed" chapter).
Safety Integrated
Function Manual, (FHS), 11/2009, 6SL3097-4AR00-0BP0
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