Manual Switch

Switch between two inputs

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  • Library:

  • Simulink / Signal Routing

  • Manual Switch block

Description

The Manual Switch block is a toggle switch that selects one of its two inputs to pass through to the output. To toggle between inputs, double-click the block. You control the signal flow by setting the switch before you start the simulation or by changing the switch while the simulation is executing. The Manual Switch block retains its current state when you save the model.

To programmatically toggle the switch, set the set_param sw property to '0' or '1'. For example, to connect the second input to the output:

set_param(gcb,'sw','0')

To connect the first input to the output:

set_param(gcb,'sw','1')

Note

Double-clicking the Manual Switch block does not open the block dialog box. Instead, it toggles the input choice.

Ports

Input

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First of two inputs to the Manual Switch block. The block propagates the selected input to the output. To select the input signal, toggle the switch by double-clicking the block.

Data Types: single | double | half | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64 | Boolean | fixed point | enumerated | bus

Second of two inputs to the Manual Switch block. The block propagates the selected input to the output. To select the input signal, toggle the switch by double-clicking the block.

Data Types: single | double | half | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64 | Boolean | fixed point | enumerated | bus

Output

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Output signal propagated from either the first or second input signal.

Data Types: single | double | half | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64 | Boolean | fixed point | enumerated | bus

Parameters

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To view the block parameters, right-click the block and select Block Parameters (ManualSwitch).

Select this check box to allow inputs with different sizes and propagate the selected input signal size to the output signal. If you clear the box, the block expands scalar inputs to have the same dimensions as nonscalar inputs. See Scalar Expansion of Inputs and Parameters.

Programmatic Use

Parameter: varsize
Type: character vector
Value: 'on' | 'off'
Default: 'off'

Specify the sample time as a value other than -1. For more information, see Specify Sample Time.

Dependencies

This parameter is not visible unless it is explicitly set to a value other than -1. To learn more, see Blocks for Which Sample Time Is Not Recommended.

Programmatic Use

Block Parameter: SampleTime
Type: character vector
Values: scalar or vector
Default: '-1'

Model Examples

Simulating Automatic Climate Control Systems

Simulating Automatic Climate Control Systems

Simulate the working of an automatic climate control system in a car using Simulink® and Stateflow®. You can enter a temperature value you would like the air in the car to reach by double clicking the User Setpoint in Celsius Block and entering the temperature value. You can also set the External Temperature in Celsius in a similar way. The numerical display on the right-hand side of the model shows the reading of a temperature sensor placed behind the driver's head. This is the temperature that the driver should be feeling. When the model is run and the climate control is active, it is this display box whose value changes to show the change of temperature in the car.

Open Model
Modeling a Fault-Tolerant Fuel Control System

Modeling a Fault-Tolerant Fuel Control System

Combine Stateflow® with Simulink® to efficiently model hybrid systems. This type of modeling is particularly useful for systems that have numerous possible operational modes based on discrete events. Traditional signal flow is handled in Simulink while changes in control configuration are implemented in Stateflow. The model described below represents a fuel control system for a gasoline engine. The system is highly robust in that individual sensor failures are detected and the control system is dynamically reconfigured for uninterrupted operation.

Open Model

Block Characteristics

Data Types

Boolean | bus | double | enumerated | fixed point | half | integer | single | string

Direct Feedthrough

yes

Multidimensional Signals

yes

Variable-Size Signals

yes

Zero-Crossing Detection

no

Extended Capabilities

Fixed-Point Conversion
Design and simulate fixed-point systems using Fixed-Point Designer™.

See Also

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Introduced before R2006a

Simulink Documentation

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