Goto

Pass block input to From blocks

• 

Libraries:
Simulink / Signal Routing
HDL Coder / Signal Routing

Description

The Goto block passes its input to its corresponding From blocks. The input can be a real- or complex-valued signal or vector of any data type. From and Goto blocks allow you to pass a signal from one block to another without actually connecting them.

A Goto block can pass its input signal to more than one From block, although a From block can receive a signal from only one Goto block. The input to that Goto block is passed to the From blocks associated with it as though the blocks were physically connected.

For example, this model uses a Goto block and a From block.

An equivalent model passes the Sine Wave block signal directly to the Gain block.

Goto blocks and From blocks are matched by the use of Goto tags.

The Tag visibility parameter determines where From blocks can access the signal.

The Goto block supports signal label propagation. For more information, see Signal Label Propagation.

You can simplify your model diagrams by replacing lengthy signal lines with sets of connected Goto and From blocks. However, when you want to trace a signal path, it can be useful to see the signal lines. You can convert signal lines and virtual buses to Goto and From block sets, and you can convert Goto and From block sets to signal lines. For more information, see Convert Signal Lines to Goto and From Block Sets.

Examples

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

This example shows how to use the From, Goto, and Goto Tag Visibility blocks to route signals in your model. The GotoGlobal block at the top-level of the model has the Goto tag parameter set to G and the Tag visibility set to global. Thus, the G tag can be seen by From and Goto blocks at any level of the model hierarchy, except locations that span nonvirtual subsystem boundaries (like the Atomic Subsystem in this model). The From block at the top level of the model can see and connect to the global G tag, but cannot see or connect to the scoped S tag or L local tag that are specified on Goto blocks further down in the model hierarchy.

Inside of the Main Subsystem, the Goto block with Goto tag set to S has a Tag visibility of scoped. The Goto Tag Visibility block placed at the same level as that Goto block indicates the S tag can be seen by all From and Goto blocks at that level and below, except for locations that cross a nonvirtual subsystem boundary (i.e. the boundary with the Atomic Subsystem). Inside of Subsystem1 and Subsystem2, the From blocks can see and connect to the global Goto tag G, and the scoped Goto tag S.

Extended Examples

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 enabled subsystem can 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

Ports

Input

Port_1 — Input signal

scalar | vector | matrix | N-D array

Input signal to be passed to the corresponding From block, specified as a scalar, vector, matrix, or N-D array.

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

Parameters

Goto tag — Block identifier

A (default) | ...

The Goto block identifier. This parameter identifies the Goto block whose scope is defined in this block.

Programmatic Use

Block Parameter: GotoTag

Type: character vector

Values: 'A' | ...

Default: 'A'

Tag visibility — Scope of the Goto block tag

local (default) | scoped | global

The scope of the Goto block tag, specified as local, scoped, or global. When you set this parameter to scoped, you must use a Goto Tag Visibility block to define the scope of tag visibility.

• local (default) — From and Goto blocks that use the same tag must be in the same subsystem. A local tag name is enclosed in brackets ([]).

• scoped — From and Goto blocks that use the same tag must be either:

  • In the same subsystem.

  • At any level in the model hierarchy below the Goto Tag Visibility block that does not entail crossing a nonvirtual subsystem boundary. In other words, they must be within the boundary of an atomic, conditionally executed, or function-call subsystem or a model reference.

  A scoped tag name is enclosed in braces ({}).

• global — From and Goto blocks using the same tag can be anywhere in the model except in locations that span nonvirtual subsystem boundaries.

The rule that From-Goto block connections cannot cross nonvirtual subsystem boundaries has the following exception. A Goto block connected to a state port in one conditionally executed subsystem is visible to a From block inside another conditionally executed subsystem.

Note

A scoped Goto block in a masked system is visible only in that subsystem and in the nonvirtual subsystems it contains. Simulink^® generates an error if you run or update a diagram that has a Goto Tag Visibility block at a higher level in the block diagram than the corresponding scoped Goto block in the masked subsystem.

Use local tags when the Goto and From blocks using the same tag name reside in the same subsystem. You must use global or scoped tags when the Goto and From blocks using the same tag name reside in different subsystems. When you define a tag as global, all uses of that tag access the same signal. A tag defined as scoped can be used in more than one place in the model.

Programmatic Use

Block Parameter: TagVisibility

Type: character vector

Values: 'local' | 'scoped' | 'global'

Default: 'local'

Icon display — Text to display on block icon

Tag (default) | Signal name | Tag and signal name

Specifies the text to display on the block 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'

Rename All — Propagate name throughout model

button

Rename the Goto tag. The new name propagates to all From and Goto Tag Visibility blocks that are listed in the Corresponding blocks box.

Alternatively, when you change the tag on the Goto block icon, propagate the new name to all corresponding From and Goto Tag Visibility blocks by pressing Shift+Enter.

Corresponding blocks — Blocks connected to this Goto block

block path | ...

List of the From blocks and Goto Tag Visibility blocks connected to this Goto block. Click an entry in the list to display and highlight the corresponding From and Goto Tag Visibility blocks.

Alternatively, in the Simulink Editor, select the Goto block to highlight the corresponding From and Goto Tag Visibility blocks.

When a corresponding From or Goto Tag Visibility block is not in the current diagram, the Subsystem block that contains the block is highlighted.

To show a corresponding block in an open diagram or new tab, select the Goto block and pause on the ellipsis. Then, select Related Blocks from the action bar. When multiple blocks correspond to the selected block, a list of related blocks opens. You can filter the list of related blocks by entering a search term in the text box. After you select a related block from the list, window focus goes to the open diagram or new tab that shows the related block.

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

Extended Capabilities

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

HDL Code Generation

Generate VHDL, Verilog and SystemVerilog code for FPGA and ASIC designs using HDL Coder™.

HDL Coder™ provides additional configuration options that affect HDL implementation and synthesized logic. HDL code generation does not support Tag Visibility of the blocks set to global. See also Required HDL Settings for Goto and From Blocks (HDL Coder).

HDL Architecture

This block has one default HDL architecture.

HDL Block Properties

InputPipeline

Number of input 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, see InputPipeline (HDL Coder).

PLC Code Generation
Generate Structured Text code using Simulink® PLC Coder™.

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

Version History

Introduced before R2006a

R2024a: Convert signal lines to Goto and From block sets

You can convert signal lines and virtual buses to sets of connected Goto and From blocks, and you can convert Goto and From block sets to signal lines.

For more information, see Convert Signal Lines to Goto and From Block Sets.