From

Accept input from Goto block

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Library:
Simulink / Signal Routing
HDL Coder / Signal Routing

Description

TheFromblock accepts a signal from a correspondingGotoblock, then passes it as output. The data type of the output is the same as that of the input from theGotoblock.From和Gotoblocks allow you to pass a signal from one block to another without actually connecting them.

For example, this model uses aGotoblock and aFromblock.

A Sine Wave block connects to a Goto block. The corresponding From block connects to a Gain block.

An equivalent model passes theSine Waveblock signal directly to theGainblock.

The Sine Wave block connects directly to the Gain block.

AFromblock can receive its signal from only oneGotoblock, although aGotoblock can pass its signal to more than oneFromblock.

To associate aGotoblock with aFromblock, enter theGotoblock tag in theGoto Tagparameter.

The visibility of aGotoblock tag determines theFromblocks that can receive its signal. For more information, seeGoto和Goto Tag Visibility. The block indicates the visibility of theGotoblock tag:

A local tag name is enclosed in brackets ([]).
A scoped tag name is enclosed in braces ({}).
全球标记名称似乎没有额外的性格cters.

Selecting aGotoblock highlights the correspondingFromblocks.

The two From blocks that corresponds to the selected Goto block is highlighted.

Similarly, selecting aFromblock highlights the correspondingGotoblock.

The Goto block that corresponds to the selected From block is highlighted.

When a subsystem contains a correspondingGotoorFromblock, theSubsystemblock is highlighted.

The From block supportssignal label propagation.

Ports

Output

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`Port_1`— Signal from connected Goto block
scalar | vector | matrix | N-D array

Signal from connectedGotoblock, output with the same dimensions and data type as the input to theGotoblock.

Parameters

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`Goto Tag`— Tag of the Goto block that forwards its signal to this block
`A`(default) || ...

Specify the tag of theGotoblock that forwards its signal to thisFromblock. To change the tag, select a new tag from the drop-down list.

The dropdown list displays theGototags that theFromblock can currently see. An item labeledappears at the end of the list the first time you display the list in a Simulink^®session. Selecting this item causes the block to update the tags list to include the tags ofGotoblocks residing in library subsystems referenced by the model containing thisFromblock. Simulink software displays a progress bar while building the list of library tags. Simulink saves the updated tags list for the duration of the Simulink session or until the next time you select the adjacentUpdate Tagsbutton. You need to update the tags list again in the current session only if the libraries referenced by the model have changed since the last time you updated the list.

Tip

If you use multipleFrom和Goto Tag Visibilityblocks to refer to the same Goto tag, you can simultaneously rename the tag in all of the blocks. To do so, use theRename Allbutton in theGotoblock dialog box.

To find the relevantGotoblock, use theGoto Sourcehyperlink in theFromblock dialog box.

Programmatic Use

Block Parameter:GotoTag

Type:character vector

Values:'A'|...

Default:'A'

`Update Tags`— Update list of visible tags

Updates the list of tags visible to thisFromblock, including tags residing in libraries referenced by the model containing thisFromblock. Update the tags list again in the current session only if the libraries referenced by the model have changed since the last time you updated the list.

`Goto Source`— Path to connected Goto block
block path

Path of theGotoblock connected to thisFromblock. Clicking the path displays and highlights theGotoblock in your model.

`Icon Display`— Text to display on block icon
`Tag`|`Tag and signal name`|`Signal name`

Specifies the text to display on theFromblock icon. The options are the block tag, the name of the signal that the block represents, or both the tag and the signal name.

Programmatic Use

Block Parameter:IconDisplay

Type:character vector

Values:'Signal name' | 'Tag' | 'Tag and signal name'

Default:'Tag'

Model Examples

Signal Routing with the From, Goto, and Goto Tag Visibility Blocks

Use the From, Goto, and Goto Tag Visibility blocks to route signals in your model.

Open Model

Simulating Automatic Climate Control Systems

模拟气候来讲一个自动的工作ol 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

Friction Model with Hard Stops

Model friction one way in Simulink®. The two integrators in the model calculate the velocity and position of the system, which is then used in the Friction Model to calculate the friction force.

Open Model

Building a Clutch Lock-Up Model

Use Simulink® to model and simulate a rotating clutch system. Although modeling a clutch system is difficult because of topological changes in the system dynamics during lockup, this example shows how Simulink's enabled subsystems easily handle such problems. We illustrate how to employ important Simulink modeling concepts in the creation of the clutch simulation. Designers can apply these concepts to many models with strong discontinuities and constraints that may change dynamically.

Open Model

Block Characteristics

Data Types	`Boolean`\|`bus`\|`double`\|`enumerated`\|`fixed point`\|`half`\|`integer`\|`single`\|`string`
Direct Feedthrough	`no`
Multidimensional Signals	`yes`
Variable-Size Signals	`yes`
Zero-Crossing Detection	`no`

More About

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Search for Goto Tags

To search for Goto tags in libraries referenced by the model when opening theFromblock dialog box, use theFollowLinksWhenOpeningFromGotoBlocksmodel parameter with theset_paramfunction.

'off'— Do not search for Goto tags (default).
'on'— Search for Goto tags.

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using Simulink® Coder™.

HDL Code Generation
Generate Verilog and VHDL code for FPGA and ASIC designs using HDL Coder™.

HDL Coder™ provides additional configuration options that affect HDL implementation and synthesized logic. See alsoRequired HDL Settings for Goto and From Blocks(HDL Coder).

HDL Architecture

This block has a single, default HDL architecture.

HDL Block Properties

ConstrainedOutputPipeline	Number of registers to place at the outputs by moving existing delays within your design. Distributed pipelining does not redistribute these registers. The default is`0`. For more details, seeConstrainedOutputPipeline(HDL Coder).
OutputPipeline	Number of output pipeline stages to insert in the generated code. Distributed pipelining and constrained output pipelining can move these registers. The default is`0`. For more details, seeOutputPipeline(HDL Coder).

From

Description