Select how variable-size signals propagate through referenced models.
Category: Model Referencing
Default: Infer
from blocks in model
Infer from blocks in modelSearches a referenced model and groups blocks into the following categories.
| Category | Description | Example Blocks in This Category |
|---|---|---|
| 1 | Output signal size depends on input signal values. | Switch or Enable Subsystem block whose parameter Propagate
sizes of variable-size signals is set to During
execution |
| 2 | States require resetting when the input signal size changes. | Unit Delay block in an Enabled Subsystem whose parameter Propagate
sizes of variable-size signals is set to Only
when enabling |
| 3 | Output signal size depends only on the input signal size. | Gain block. |
The search stops at the boundary of Enable, Function-Call, and Action subsystems because these subsystems can specify when to propagate the size of a variable-size signal.
Simulink® sets the propagation of variable-size signals for a referenced model as follows:
One or more blocks in category 1, and all other blocks
are in category 3, select During execution.
One or more blocks in category 2, and all another
blocks are in category 3, select Only when enabling.
Blocks in category 1 and 2, report an error.
All blocks in category 3 with a conditionally executed subsystem that is not an Enable, Function-Call, or Action subsystem, report an error. Simulink, in this case, cannot determine when to propagate sizes of variable-size signals.
All blocks in category 3 with only conditionally executed
subsystems that are an Enable, Function-Call, or Action subsystem,
support both Only with enabling and During
execution.
Only when enablingPropagates sizes of variable-size signals for the referenced model only when enabling (at Enable method).
During executionPropagates sizes of variable-size signals for the referenced model during execution (at Outputs method).
Parameter: PropagateVarSize |
Value: 'Infer from
blocks in model' | 'Only when enabling'| 'During
execution' |
Default: 'Infer
from blocks in model' |
| Application | Setting |
|---|---|
| Debugging | No impact |
| Traceability | No impact |
| Efficiency | No impact |
| Safety precaution | No recommendation |