4.10.1.4 Safely-Limited Speed without selection
Differences between Safely-Limited Speed with and without selection
● As an alternative to controlling via terminals and/or PROFIsafe, there is also the option to
parameterize the SLS function without selection.
● The function "SLS without selection" is selected with p9512.4 = 1.
● For "SLS without selection", only one SLS limit value can be parameterized (p9531[0]).
● The stop response is parameterized with p9563[0].
● For Safely-Limited Speed without selection there is no delay time. The function is always
active (with encoder), or it becomes active when switching on (without encoder).
Switching the motor on and off (without encoder)
The time response and diagnostic options are as follows in this SLS version:
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Figure 4-16 Time response of SLS without selection (example: Switching the motor on and off (without
encoder))
"SLS without selection" behaves as follows when switching off and switching on again:
● After switch-off, the motor behaves in accordance with the canceled signal (OFF1, OFF2 or
OFF3).
● The "safe pulse cancellation" becomes active after the standstill limit is undershot. If a brake
has been parameterized, it is also closed.
● After the ON command, the converter cancels the "safe pulse cancellation" state and the
start procedure is initiated.
● If the minimum current has not been reached after 5 s, the converter returns into the "safe
pulse suppression" state and initiates alarm C01711.
Safety functions integrated in the drive
4.10 SLS
Safety Integrated (with SINAMICS S120)
144 Commissioning Manual, 02/2020, A5E46305916B AB
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