Assemble Variant Conditions Propagated from Variant Blocks
During simulation, Simulink® propagates the variant conditions specified on the variant blocks to the
connecting blocks. The variant conditions propagated from multiple variant blocks are combined
using the AND (&&) and OR
(||) operators.
Cross-Coupling of Inputs and Outputs
In this model, the Variant Source block has two inputs with variant
conditions Var == 1 and Var == 2, respectively. The
first input to the Variant Source block branches into its second input before connecting to
the block and are active when Var == 1 or Var == 2
evaluates to true.
During simulation, this model exhibits three modes of operation:
| Variant Condition | Active Choice |
|---|---|
Var == 1 | First input of Variant Source |
Var == 1 || Var == 2 | Second input of Variant Source and the branch of the first input |
Var == 2 | Second input of Variant Source |
Cascading Blocks and Compounding Conditions
In this model, Variant Source A and Variant Source
B are two Variant Source blocks, each fed by two input ports and
connected in a cascading manner. The inputs to Variant Source A are
active when VarA == 1 or VarA == 2. The output of
Variant Source A branches into one of the inputs of Variant
Source B. The inputs to Variant Source B are active when
VarB == 1 or VarB == 2 evaluates to
true.
During simulation, this model exhibits eight modes of operation:
| Variant Condition | Active Choice |
|---|---|
VarA == 1 && VarB == 1 | First inputs of |
VarA == 1 && VarB == 2 | First input of Variant Source A and the second input of
Variant Source B |
VarA == 2 && VarB == 1 | Second input of Variant Source A and the first input of
Variant Source B |
VarA == 2 && VarB == 2 | Second inputs of Variant Source A and Variant
Source B |
VarA == 1 && VarB != (1,2) | First input of Variant Source A |
VarA == 2 && VarB != (1,2) | Second input of Variant Source B |
VarA != (1,2) && VarB == 1 | None |
VarA != (1,2) && VarB == 2 | Second input of Variant Source B |
VarA != (1,2) && VarB != (1,2) | None |
Hierarchical Nesting of Blocks
In this model, multiple Variant Source blocks are used to create
hierarchical nesting of variant choices and provide variations on sensor inputs. Multiple
choices for sensors are first grouped by series: A Series, B
Series, and C Series. The Variant Source
block, Device Model, selects a sensor from one of the series. The
Vendor block then chooses from the sensor choices provided by
Device Model and X Sensor.
Simulink propagates complex variant control conditions to determine which model components are active during compilation.
