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After you build a VI front panel and block diagram, build the icon and the connector pane so you can use the VI as a subVI.

Creating an icon

Every VI displays an icon, shown in , in the upper right corner of the front panel and block diagram windows. Anicon is a graphical representation of a VI. It can contain text, images, or a combination of both. If you use a VI as asubVI, the icon identifies the subVI on the block diagram of the VI.

The default icon contains a number that indicates how many new VIs you have opened since launching LabVIEW. Create customicons to replace the default icon by right-clicking the icon in the upper right corner of the front panel or block diagramand selecting Edit Icon from the shortcut menu or double-clicking the icon in the upper right corner of thefront panel. You also can edit icons by selecting File>>VI Properties selecting General from the Category pull-down menu, and clicking the Edit Icon button.

Use the tools on the left side of the Icon Editor dialog box to create the icon design in the editing area. The normal size image of the icon appears in theappropriate box to the right of the editing area, as shown in the dialog box in .

Depending on the type of monitor you use, you can design a separate icon for monochrome, 16-color, and 256-colormode. LabVIEW uses the monochrome icon for printing unless you have a color printer.

Use the Edit menu to cut, copy, and paste images from and to the icon. When you select a portion of theicon and paste an image, LabVIEW resizes the image to fit into the selection area. You also can drag a graphic from anywherein your file system and drop it in the upper right corner of the front panel or block diagram. LabVIEW converts the graphicto a 32 32 pixel icon.

Use the Copy from option on the right side of the Icon Editor dialog box to copy from a color icon to a black-and-white icon and vice versa. After youselect a Copy from option, click the OK button to complete the change.

If you do not draw a complete border around a VI icon, the icon background appears transparent. When you select theicon on the block diagram, a selection marquee appears around each individual graphic element in the icon.

Use the tools on the left side of the Icon Editor dialog box to create the icon design in the editing area. The normal size image of the icon appears in theappropriate box to the right of the editing area. The following tasks can be performed with these tools:

  • Use the Pencil tool to draw and erase pixel by pixel.
  • Use the Line tool to draw straight lines. To draw horizontal, vertical, and diagonal lines, press the <Shift> key while you use this tool to drag the cursor.
  • Use the Color Copy tool to copy the foreground color from an element in the icon.
  • Use the Fill tool to fill an outlined area with the foreground color.
  • Use the Rectangle tool to draw a rectangular border in the foreground color. Double-click this tool to framethe icon in the foreground color.
  • Use the Filled Rectangle tool to draw a rectangle with a foreground color frame and filled with thebackground color. Double-click this tool to frame the icon in the foreground color and fill it with the backgroundcolor.
  • Use the Select tool to select an area of the icon to cut, copy, move, or make other changes. Double-click thistool and press the <Delete> key to delete the entire icon.
  • Use the Text tool to enter text into the icon. Double-click this tool to select a differentfont. ( Windows ) The Small Fonts option works well in icons.
  • Use the Foreground/Background tool to display the current foreground and background colors. Click eachrectangle to display a color palette from which you can select new colors.
  • Use the options on the right side of the editing area to perform the following tasks:
    • Show terminals

      Displays the terminal pattern of the connector pane.
    • Ok

      Saves the drawing as the icon and returns to the frontpanel.
    • Cancel

      Returns to the front panel without saving anychanges.
  • The menu bar in the Icon Editor dialog box contains more editing options such as Undo, Redo, Cut, Copy, Paste , and Clear .

Setting up the connector pane

To use a VI as a subVI, you need to build a connector pane , shown in . The connector pane is a set of terminals that corresponds to the controls andindicators of that VI, similar to the parameter list of a function call in text-based programming languages. Theconnector pane defines the inputs and outputs you can wire to the VI so you can use it as a subVI.

Define connections by assigning a front panel control or indicator to each of the connector pane terminals. To define aconnector pane, right-click the icon in the upper right corner of the front panel window and select Show Connector from the shortcut menu. The connector pane replaces the icon. Each rectangle on the connector pane represents aterminal. Use the rectangles to assign inputs and outputs. The number of terminals LabVIEW displays on the connector panedepends on the number of controls and indicators on the front panel. The following front panel has four controls and oneindicator, so LabVIEW displays four input terminals and one output terminal on the connector pane.

Selecting and modifying terminal patterns

Select a different terminal pattern for a VI by right-clicking the connector pane and selecting Patterns from the shortcut menu. Select a connector pane pattern with extraterminals. You can leave the extra terminals unconnected until you need them. This flexibility enables you to make changeswith minimal effect on the hierarchy of the VIs. You also can have more front panel controls or indicators than terminals.

A solid border highlights the pattern currently associated with the icon. The maximum number of terminals available for asubVI is 28.

The most commonly used pattern is shown in . This pattern is used as a standard to assist in simplifyingwiring. The top inputs and outputs are commonly used for passing references and the bottom inputs and outputs are usedfor error handling. Refer to the section on Clusters for more information about error handling.

Try not to assign more than 16 terminals to a VI. Too many terminals can reduce the readability and usability of theVI.

To change the spatial arrangement of the connector pane patterns, right-click the connector pane and select Flip Horizontal, Flip Vertical, or Rotate 90 Degrees from the shortcut menu.

Assigning terminals to controls and indicators

After you select a pattern to use for the connector pane, you must define connections by assigning a front panel control orindicator to each of the connector pane terminals. When you link controls and indicators to the connector pane, placeinputs on the left and outputs on the right to prevent complicated, unclear wiring patterns in your VIs.

To assign a terminal to a front panel control or indicator, click a terminal of the connector pane, then click the frontpanel control or indicator you want to assign to that terminal. Click an open space on the front panel. The terminalchanges to the data type color of the control to indicate that you connected the terminal.

You also can select the control or indicator first and then select the terminal.

Although you use the Wiring tool to assign terminals on the connector pane to front panel controls andindicators, no wires are drawn between the connector pane and these controls and indicators.

Questions & Answers

who was the first nanotechnologist
Lizzy Reply
k
Veysel
technologist's thinker father is Richard Feynman but the literature first user scientist Nario Tagunichi.
Veysel
Norio Taniguchi
puvananathan
Interesting
Andr
I need help
Richard
anyone have book of Abdel Salam Hamdy Makhlouf book in pdf Fundamentals of Nanoparticles: Classifications, Synthesis
Naeem Reply
what happen with The nano material on The deep space.?
pedro Reply
It could change the whole space science.
puvananathan
the characteristics of nano materials can be studied by solving which equation?
sibaram Reply
plz answer fast
sibaram
synthesis of nano materials by chemical reaction taking place in aqueous solvents under high temperature and pressure is call?
sibaram
hydrothermal synthesis
ISHFAQ
how can chip be made from sand
Eke Reply
is this allso about nanoscale material
Almas
are nano particles real
Missy Reply
yeah
Joseph
Hello, if I study Physics teacher in bachelor, can I study Nanotechnology in master?
Lale Reply
no can't
Lohitha
where is the latest information on a no technology how can I find it
William
currently
William
where we get a research paper on Nano chemistry....?
Maira Reply
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
Ali
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
hey
Giriraj
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
has a lot of application modern world
Kamaluddeen
yes
narayan
what is variations in raman spectra for nanomaterials
Jyoti Reply
ya I also want to know the raman spectra
Bhagvanji
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
STM - Scanning Tunneling Microscope.
puvananathan
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Source:  OpenStax, Pdf generation test course. OpenStax CNX. Dec 16, 2009 Download for free at http://legacy.cnx.org/content/col10278/1.5
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