Enabled and Triggered Subsystem

Subsystem whose execution is enabled and triggered by external inputs

• Library:

• Simulink / Ports & Subsystems

Description

The Enabled and Triggered Subsystem block is a Subsystem block preconfigured as a starting point for creating a subsystem that executes when both of these conditions occur:

• Enable control signal has a positive value.

• Trigger control signal has a trigger value.

Use Enabled and Triggered Subsystem blocks to model:

• Optional functionality.

• Alternative functionality.

Ports

Input

In — Signal input to a subsystem block

scalar | vector | matrix

Placing an Inport block in a subsystem block adds an external input port to the block. The port label matches the name of the Inport block.

Use Inport blocks to get signals from the local environment.

Data Types: single | double | int8 | int16 | int32 | uint8 | uint16 | uint32 | Boolean | fixed point | enumerated | bus

Enable — Control signal input to a subsystem block

scalar

Placing an Enable block in a subsystem block adds an external input port to the block.

Data Types: single | double | int8 | int16 | int32 | uint8 | uint16 | uint32 | fixed point

Trigger — Control signal input to a subsystem block

scalar

Placing a Trigger block in a subsystem block adds an external input port to the block.

Data Types: single | double | int8 | int16 | int32 | uint8 | uint16 | uint32 | fixed point

Output

Out — Signal output from a subsystem

scalar | vector | matrix

Placing an Outport block in a subsystem block adds an output port from the block. The port label on the subsystem block is the name of the Outport block.

Use Outport blocks to send signals to the local environment.

Data Types: single | double | int8 | int16 | int32 | uint8 | uint16 | uint32 | Boolean | fixed point | enumerated | bus

Model Examples

Counters Using Conditionally Executed Subsystems

The contrast between enabled subsystems and triggered subsystems for the same control signal, through the use of counter circuits. After running the simulation, the scope shows three plots.

Open Model

Block Characteristics

Data Types	Boolean[a] | bus[a] | double[a] | enumerated[a] | fixed point[a] | integer[a] | single[a] | string[a]
Direct Feedthrough	no
Multidimensional Signals	limited[a]
Variable-Size Signals	limited[a]
Zero-Crossing Detection	no
[a] Actual data type or capability support depends on block implementation.

Extended Capabilities

C/C++ Code Generation

Generate C and C++ code using Simulink® Coder™.

Actual code generation support depends on block implementation.

Fixed-Point Conversion

Convert floating-point algorithms to fixed point using Fixed-Point Designer™.

Actual data type support depends on block implementation.