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Manual Switch

Switch between two inputs

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  • Manual Switch block

Libraries:
Simulink / Signal Routing

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.

Examples

Simulating Automatic Climate Control Systems

Simulating Automatic Climate Control Systems

Simulate an automatic climate control system in a car using Simulink® and Stateflow®.

Model Fault-Tolerant Fuel Control System

Model Fault-Tolerant Fuel Control System

Combine Stateflow® and Simulink® capabilities to 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 in this example represents a fuel control system for a gasoline engine. The system is robust in that it detects individual sensor failures, and the control system is dynamically reconfigured for uninterrupted operation.

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 time interval between samples. To inherit the sample time, set this parameter to -1. For more information, see Specify Sample Time.

Dependencies

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

Programmatic Use

To set the block parameter value programmatically, use the set_param function.

Parameter: SampleTime
Values: "-1" (default) | scalar or vector in quotes

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™.

Version History

Introduced before R2006a

See Also

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