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Automation 2-23
2-23
2.4.3 Basis Objects
The Basis objects refer predominantly to objects handled by the
HYSYS BasisManager. The BasisManager object in HYSYS is
responsible for handling the global aspects of a HYSYS
simulation case. These objects include reactions, components,
and property packages.
The BasisManager object is accessed through the
SimulationCase object. From the BasisManager object the
FluidPackages and HypoGroups collection objects are accessed.
Changing the objects accessed directly or indirectly through the
BasisManager such as FluidPackages, PropertyPackage,
Components, and Hypotheticals requires notification to the
HYSYS simulation environment. The BasisManager object
contains methods that allow changes to the basis to take place
smoothly. The following methods must be used on the outer
limits of any code that makes changes to Basis objects.
FluidPackage(s)
Although both examples of syntax shown below lead you to a
FluidPackage object, there are differences that exist which are
only apparent when attempting to use the fluid package.
The FluidPackages object returned by the BasisManager object
is a collection object containing all FluidPackage objects in a
case. Each FluidPackage object can have its own
Syntax: Changing Basis Values
SimulationCase.BasisManager.StartBasisChange
... changes to components, interaction parameters, reactions, etc.
SimulationCase.BasisManager.EndBasisChange
Syntax: Accessing FluidPackages
From the BasisManager
SimulationCase.BasisManager.FluidPackages.Item(0)
From the Flowsheet
SimulationCase.Flowsheet.FluidPackage
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