Restrictions For Safety Integrated Functions "Without Encoder - Siemens Sinamics S120 Function Manual

Description of Safety Integrated functions
4.2 Safety Integrated Extended Functions
"Parking" state for Safety Integrated Extended Functions with encoder
Not e
E x tended Functions with encoder and " parking"
When a drive object, for which Safety Integrated Extended Functions with encoder 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.
4.2.3

Restrictions for Safety Integrated Functions "without encoder"

Basic Functions
The Basic Functions are available without any restrictions in all control modes, with and
without an encoder, for synchronous, induction, and reluctance motors.
A safety-related encoder is not required for Basic Functions.
The Safety Integrated functions "without encoder" are also permitted for group drives
(several motors connected to one power unit).
Ex tended Functions
Extended Functions SS1, SLS, SDI and SSM "without encoder" do not require safety-related
speed actual value sensing. If an encoder is used for the drive control, this has no influence
on the sensorless safety functions. They can be used with induction motors in all control
modes, as well as with SIEMOSYN synchronous motors with U/f control.
The Safety Integrated functions "without encoder" are also permitted for group drives
(several motors connected to one power unit).
Not e
The s lip of an induction motor must be t aken into account
For Safety Integrated without encoder (depending on the drive load), as a result of slip for
induction motors (deviations between electrical and mechanical speed), deviations can occur
between the safely determined electrical speed and the mechanical speed at the motor
shaft.
When using Extended Functions, observe the following restrictions.
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Function Manual, (FHS), 07/2016, 6SL3097-4AR00-0BP6
Safety Integrated