Siemens Sinamics S120 Function Manual page 56

Overview of Safety Integrated functions
3.2 Safety Integrated Extended Functions
Selecting and deselecting SDI
As soon as the converter identifies that SDI has been selected via a fail-safe input or via
PROFIsafe safe communication, the following happens:
● You can also set a delay time, within which you can ensure that the converter moves in
the enabled (safe) direction.
● You can also set a tolerance, within which the converter tolerates movement in the
direction that has not been enabled (unsafe). You can avoid the triggering of faults during
braking (overshoot) as well as in controlled standstill.
● After the delay time has expired, the converter monitors the direction of rotation of the
motor.
● If the converter now moves in the blocked direction by more than the configured
tolerance, a message will be output and the defined stop response will be initiated.
Image 3-6
Not e
S DI without s election
As an alternative to controlling via terminals and/or PROFIsafe, there is also the option of
parameterizing SDI without selection. In this case, SDI will be permanently active after
POWER ON. You will find details of this in Chapter "Safe Direction without selection
(Page 119)."
Details and parameterization
For further details and information on how to parameterize this function, see Section "Safe
Direction (SDI) (Page 115)".
56
Time response of the safety function SDI (Safe Direction)
Function Manual, (FHS), 07/2016, 6SL3097-4AR00-0BP6
Safety Integrated