In Bus Element

Open the example model namedCreateInputBusElementPort。

To add an input bus element port for a model, add an In Bus Element block to the top level of the model. For example, double-click the canvas and start typing the block name. Then, select the In Bus Element block.

To add an input bus element port to a subsystem, add an In Bus Element block to the subsystem or click the edge of the Subsystem block and selectCreate in bus port。

打开子系统,双击子system block.

The subsystem contains a default In Bus Element block that corresponds to the input port you created on the Subsystem block. The block label uses default values for its two interactive text fields: the port name (InBus) and the bus element (signal1).

To create another input bus element port from inside a model component, holdCtrlwhile you drag an existing In Bus Element block to a new location. Upon releasing the pointer, click创建新的端口。

An In Bus Element block with a unique port name appears.

In this example, the new port is namedInBus1。

To edit the port name, click the port name in the block label. Then, enter a new name.

Alternatively, set thePort nameblock parameter to the desired name for the port.

When multiple blocks are associated with the same port and you change the name of the port, all blocks that share the port update to reflect the new port name.

For example, in theInBus.signal1label of a defaultIn Bus Elementblock, clicksignal1。

删除the text from this field. Then, click elsewhere on the canvas to commit the change.

To change the name of the port associated with the block, edit the first text field in the block label.

For example, suppose the port expects a chirp signal. In the block label, clickInBus。

删除InBusand enterchirp。Ignore the placeholder text that shows where you can enter an element name.

Alternatively, set thePort nameblock parameter to the desired name for the port.

Open and compile the example model namedSelectInputBusElements。To compile the model, on theModelingtab of the Simulink Toolstrip, clickUpdate ModelorRun。Compiling the model updates the line styles, which you can use to visually identify buses.

A Bus Creator block creates a virtual bus that contains two elements: a nested bus namednonconstantand a signal namedconstant。Thenonconstantbus contains two signals namedsineandchirp。The top-level bus connects to the input port of the Subsystem block.

打开子系统,双击子system block.

The subsystem contains an In Bus Element block that corresponds to the input port. The block label indicates that the block selects the signal namedconstantfrom the input port.

To change the element that the block selects, edit the second text field in the block label. When the second text field is empty, a menu provides the elements of the port along with the previously selected element.

When the list of input elements is long, filter the list of elements by starting to type the name of the element you want to select.

For this example, typechirp。

The list provides the text you type as an option. However, the top-level input bus does not contain a signal namedchirp。The nested bus namednonconstantcontains the signal namedchirp。Therefore, select the option namednonconstant.chirp。Each dot in the label follows the name of a bus in the input bus hierarchy.

Open the Property Inspector. Then, select the In Bus Element block. Alternatively, double-click the block to open a dialog box.

The element that the block selects is highlighted. The elements that an In Bus Element block does not select are gray and italicized.

To add blocks for additional input elements, click an element name or holdCtrlas you click multiple element names. Then, clickAdd blocks for selected signals。

Corresponding In Bus Element blocks appear in the block diagram.

Multiple In Bus Element blocks can select the same element. For example, add another block that selects the element namedconstant。

The duplicate block is highlighted.

To find duplicate blocks when the block diagram is complicated, select the block, pause on the ellipsis, and in the action bar, clickRelated Blocks。

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. Clicking a related block in the list selects the block in the block diagram.

In a blank model, add anIn Bus Elementblock.

Open theProperty Inspector。Then, select theIn Bus Elementblock. Alternatively, double-click the block to open a dialog box.

To add an element to the port with a block, select the element that you want to contain the new element. Then, click theAdd elementbutton.

The new element is nested under the previously selected element. In the block diagram, a block that selects the new element appears.

To add an element without a block, in the Property Inspector or dialog box, select the element that you want to contain a new element. Then, click theAdd elementbutton arrow, and selectAdd element without block。

The new element is nested under the previously selected element in the Property Inspector or dialog box. The block diagram is unchanged.

Optionally, reorder input elements by dragging them to new locations in the list of elements.

To add blocks for additional input elements, click an element name or holdCtrlas you click multiple element names. Then, clickAdd blocks for selected signals。

CorrespondingIn Bus Elementblocks appear in the block diagram.

When multipleIn Bus Elementblocks select the same element, selecting one of the blocks highlights the other blocks that select the same element.

To find duplicate blocks when the block diagram is complicated, select the block, pause on the ellipsis, and in the action bar, clickRelated Blocks。

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. Clicking a related block in the list selects the block in the block diagram.

Open the example model namedBusElementPortBlocks。

The model contains:

To reduce the size of the block labels, display only the leaf element names. Select an In Bus Element or Out Bus Element block, pause on the ellipsis, and in the action bar, clickCompact Notation。

All In Bus Element and Out Bus Element blocks in the block diagram display shortened block labels that use only the leaf element name.

To show the full block label, in the action bar, you can clickExpanded Notation。For this example, keep the compact block labels.

Block colors can help differentiate unique ports when the block labels are compact.

Open the Property Inspector. Then, select an In Bus Element block that corresponds with the port namedInBus。For example, select the block labeledconstant。另外,双击打开一个块dialog box.

In the Property Inspector or dialog box, selectInBus。Then, clickSet colorand select a color from the menu.

The blocks related to the port use the chosen color.

To identify the blocks that select the nested bus namednonconstantor its elements, selectnonconstant。Then, clickSet colorand select a different color from the menu.

The blocks related to the nested bus use the chosen color.

For example, suppose you have a subsystem interface that receives a bus namedInBus。One of the elements of the bus, namedpulse, has been removed. However, at least oneIn Bus Elementblock selects the element.

To remove the blocks that select the invalidpulseelement, click the element name. Then, clickRemove blocks of selected signals。

The operation removes the invalid element and corresponding block.