Specify this S-function should be placed as soon as possible
Specifies that this S-function should be placed as soon as possible in the block sorted order.
uses a hierarchical sorted order such as that used
by blocks. Within a subsystem, the Simulink® engine places an S-function block
using this option as far up in the sorted order as
possible without changing the model's semantics.
If the S-function's Priority
block property is set, and other blocks in the
same subsystem have the same priority, the engine
places S-functions with this option before the
other blocks in the same subsystem with the same
priority. This option is typically used by devices
connecting to hardware when you want to ensure the
hardware connection is completed first.
Simulink honors the
relative to other blocks, only if this block and the other blocks
are in the same subsystem. As a result, Simulink does not compare
two blocks set with
SS_OPTION_PLACE_ASAP if they
exist in different subsystems. In addition, Simulink might not
place blocks with
SS_OPTION_PLACE_ASAP set before
SS_OPTION_PLACE_ASAP set if they
are in different subsystems.
For more information on block sorted orders, see What Is Execution Order?