week 1 - labview student ambassadors_v1

8/10/2019 Week 1 - LabVIEW Student Ambassadors_v1

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TOPICS

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LabVIEW Core 1

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What You Need to Get Started

Computer runningLabVIEW 2012 or later

and Windows XP or later

LabVIEW Core 1 Course Manual LabVIEW Core 1 Exercise Manual LabVIEW Core 1 Files (or Course CD)

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File Locations

The course installer places the course files in the followinglocation:

Root DirectoryExercises

Solutions

LabVIEWCore 1

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Instructional Methods

TopicLecture

Quizzes

Demonstrations

ConceptExercise

DevelopmentExercise

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Getting the Most out of this Course

Ask questions! Experiment with hands-on exercises to understand the

methods used Explore solutions Implementations explore a possible solution you may find

a better one

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Certifications

Certified LV AssociateDeveloper Exam

Certified LabVIEWDeveloper Exam

Certified LabVIEWArchitect Exam

LabVIEW Core 3LabVIEW Core 1

LabVIEW Core 2

Managing Software

Engineering in LabVIEWAdvanced Architectures

in LabVIEWLabVIEW Connectivity

Object-Oriented Designand Programming in LabVIEW

LabVIEW Performance

LabVIEW Real-Time 1LabVIEW Real-Time 2

LabVIEW Instrument ControlLabVIEW Modular Instruments

LabVIEW FPGADAQ & Signal Conditioning

Other Courses

New User Experienced User Advanced User

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Course Learning Map

Lesson 3

Implementing a VI

Lesson 2

Troubleshooting & DebuggingVIs

Lesson 1

Navigating LabVIEW

Lesson 6Managing File and Hardware

Resources

Lesson 5

Creating and Leveraging DataStructures

Lesson 4

Developing Modular Applications

Lesson 8

Solving Dataflow Challengeswith Variables

Lesson 7

Using Sequential and StateMachine Algorithms

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Course Goals

This course prepares you to do the following: Solve problems using LabVIEW Develop, debug, and test LabVIEW VIs Use modular programming practices Select, create, and leverage common data structures Use data acquisition and instrument control in LabVIEW

applications Effectively use a state-machine architecture

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TOPICS

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Lesson 1Navigating LabVIEW

A. What Is LabVIEW?B. Project ExplorerC. Parts of a VI

D. Front PanelE. Block Diagram

F. Searching for Controls, VIsand Functions

G. Selecting a Tool

H. DataflowI. Building a Simple VI

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A. What Is LabVIEW?

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What Is LabVIEW?

A graphical programming environment used to developsophisticated measurement, test, and control systems.

LabVIEW:

Interfaces with widevariety of hardware Scales across

different targets and

OSs Provides built-in

analysis libraries

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LabVIEW Language Characteristics

LabVIEW Core 1Topics

Graphical Dataflow-oriented Compiled Multi-platform

Synchronous

LabVIEW Core 2and Later Topics

Event-driven Multi-threaded Object-oriented Multi-target

Memory-Managed

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B. Project Explorer

Project Explorer WindowFiles TypesProject Folders

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Project Explorer

Find, access, and organizeproject files

Prevent, detect, and resolveincorrect links

Deploy or download files totargets

Manage code for build options Executables, installers, and zip files

Integrate with source codecontrol providers

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LabVIEW Files

Common LabVIEW fileextensions:

LabVIEW project .lvprojVirtual instrument (VI) .viCustom control .ctl

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Virtual folder Organizes project items and

does not represent files ondisk

Auto-populating folder Adds a directory on disk to the

project LabVIEW continuously

monitors and updates thefolder according to changesmade in the project and ondisk

Adding Folders to a Project

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C. Parts of a VI

Front PanelBlock DiagramIcon

Connector Pane

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Parts of a VI Front Panel

You build the frontpanel withcontrols (inputs) and

indicators (outputs).

Front Panel User interface for the VI

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Parts of a VI Block Diagram

Front panel objectsappear as terminalson the block diagram.

Block Diagram Contains thegraphical source code

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Parts of a VI Icon/Connector Pane

Icons and connector panes are necessary to use a VI as asubVI. A subVI is a VI that appears on the block diagram of another VI. A subVI is similar to a subroutine or function in a text-based

programming language.

Icon Graphical representation of a VI

Connector Pane Map of the inputsand outputs of a VI

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DEMONSTRATION

Using the Project Explorer and Starting a VI

Open an existing project. Identify the parts of a VI. Create a new project. Add and remove files and folders. Create a new VI.


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D. Front Panel

Controls and IndicatorsObject StylesObject Types

BooleanNumericString

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Front Panel

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Controls and IndicatorsControls

Input devices Knobs, buttons, slides Supply data to the block

diagram

Indicators Output devices Graphs, LEDs Display data the block diagram

acquires or generates

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Front Panel Object Styles

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Numeric Controls and Indicators

The numeric data in a control or indicator can representnumbers of various types, such as integer or floating-point.

Numeric indicator

Numeric controlIncrement/Decrement buttons

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Boolean Controls and Indicators

The Boolean data type represents data that has only twooptions, such as True/False or On/Off.

Use Boolean controls and indicators to enter and display

Boolean (TRUE/FALSE) values. Boolean objects simulate switches, push buttons, and LEDs.

Booleancontrol

Booleanindicator

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Strings

The string data type is a sequence of ASCII characters . Use string controls to receive text from the user, such as a

password or user name. Use string indicators to display text to the user.

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E. Block Diagram

TerminalsNodesWires

Context Help

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Block Diagram

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Block Diagram

Block diagram items: Terminals Constants Nodes

Functions SubVIs Structures

Wires Free labels

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Terminals

Same label name

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Terminals for Front Panel Objects

Terminals are: Entry and exit ports that exchange information between the

front panel and block diagram.

Analogous to parameters in text-based programminglanguages.

Double-click a terminal to locate the corresponding frontpanel object.

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View Terminals as Icons

By default,View as Icon optionenabled.

Deselect View as Icon for a more

compact view.

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Nodes

Nodes are objects on the block diagram that have inputsand/or outputs and perform operations when a VI runs.

Nodes

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Function Nodes

Functions are: Fundamental operating elements of LabVIEW. Do not have front panels or block diagrams, but do have

connector panes. Has a pale yellow background on its icon.

Double-clicking a function only selects the function.

Functions do not open like VIs and subVIs.

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SubVI Nodes

SubVIs : Are VIs that you use on the block diagram of another VI. Have front panels and block diagrams. Use the icon from the upper-right corner of the front panel as

the icon that appears when you place the subVI on a blockdiagram.

When you double-click a subVI, the front panel and blockdiagram open.

Any VI has the potential to be used as a subVI.

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Express VIs

Express VIs: Are a special type of subVI. Require minimal wiring because you configure them

with dialog boxes. Save each configuration as a subVI.

Icons for Express VIs appear on the block diagramas icons surrounded by a blue field.

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Node View Options

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Wires

Wires transfer data between block diagram objects. Wires are different colors, styles, and thicknesses,

depending on their data types. A broken wire appears as a dashed

black line with a red X in the middle.

Scalar

Floating-point Integer String Boolean

1-D Array

2-D Array

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Context Help

Displays basic informationabout wires and nodes whenyou move the cursor over anobject.

Can be shown or hidden inthe following ways. Select HelpShow Context

Help from the LabVIEW menu. Press . Click the following button on the

toolbar:

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LabVIEW Help

Contains detailed descriptions and instructions for mostpalettes, menus, tools, VIs, and functions. Can be accessed by:

SelectingHelpLabVIEW Help from themenu.

Clicking theDetailed help link in the

Context Help window. Right-clicking an object

and selecting Help fromthe shortcut menu.

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Examples

LabVIEW includeshundreds of exampleVIs.

Use NI Example Finderto browse and searchinstalled examples. Select HelpFind

Examples in the menu. Click the example buttons inLabVIEW Helptopics.

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GOAL

Group Exercise 1-1Concept: Exploring a VI

Identify the parts of an existing VI.


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DISCUSSION

Group Exercise 1-1Concept: Exploring a VI

What are constants and when should you use them? What are free labels and when should you use them?


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F. Searching for Controls, VIs, andFunctions

PalettesQuick DropNI Global Search

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Searching for Controls, VIs, and Functions

Ways to find controls, VIs, and functions: Search or navigate the palettes.

Controls palette Functions palette

Search by name of object. Quick Drop dialog box

Search palettes, LabVIEW Help, and ni.com . Search text box in toolbar

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Controls Palette

Contains the controls andindicators you use to createthe front panel.

Navigate the subpalettes oruse the Search button tosearch the Controls palette.

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Functions Palette

Contains the VIs, functions,and constants you use tocreate the block diagram.

Navigate the subpalettes oruse the Search button tosearch the Functions palette.

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Searching with Quick Drop

Lets you quickly find controls,functions, VIs, and otheritems by name.

Press the keysto display the Quick Dropdialog box.

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Global Search

Use the Search bar in the top right of the front panel and blockdiagram windows to search palettes,LabVIEW Help, andni.com .

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DEMONSTRATION

Search for Controls, VIs, and Functions

Configure palettes to customize visible palettes. Search and navigate the palettes. Search for help using global search. Use Quick Drop to search by name.


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GOAL

Exercise 1-2Concept: Locating Controls, Functions, and VIs

Learn to use the palettes and search for controls, functionsand VIs.

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DISCUSSION

Exercise 1-2Concept: Locating Controls, Functions, and VIs

Why would you want to add a function to theFavorites category

in theFunctions palette? Why would you use theQuick Drop dialog box instead of the

Search button on theControls and Functions palettes?


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G. Selecting a ToolSelecting a ToolBlock Diagram Clean-Up

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Selecting a Tool

A tool is a special operating mode of themouse cursor.

Create, modify, and debug VIs using thetools provided by LabVIEW.

By default, LabVIEW automatically selectstools based on the context of the cursor.

If you need more control, use theTools palette to select a specific tool. Select ViewTools Palette to open the

Tools palette.

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Wiring Tips

Press to delete all broken wires. Right-click and selectClean Up Wire to reroute the wire.

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Wiring Tips Clean Up Diagram

Use the Clean Up Diagram tool to reroute multiple wires andobjects and to improve readability.

1. Select a section of your block diagram.2. Click the Clean Up Diagram button on the block diagram

toolbar.

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Cloning and Moving Items

Clone an object in Windows using the following steps:1. Select the Positioning tool.2. Press the key while clicking an object.3. Drag the copy to new location.

Move an object using the following steps:1. Select the Positioning tool.2. Click and drag the object to new location.

Note: Avoid cutting and pasting objects as this can impact related items.For example, cutting and pasting a block diagram terminal also moves thefront panel object.

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DEMONSTRATION

Selecting, Editing, Resizing and Wiring

Select item to move, copy, or delete Edit text Resize an object Wire terminals and nodes


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GOAL

Exercise 1-3Concept: Selecting a Tool

Gain experience using the Automatic Tool Selection to selectwhich tool to use.


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DISCUSSION

Exercise 1-3Concept: Selecting A Tool

How do you enable automatic tool selection?


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H. Dataflow

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Dataflow

LabVIEW follows a dataflow model for running VIs. A node executes only when data are available at all of its

required input terminals. A node supplies data to the output terminals only when the

node finishes execution.

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Dataflow Quiz

Which node executes first?a) Addb) Subtractc) Random Numberd) Dividee) Sine

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Dataflow Quiz Answers

No single correct answer.

Which node executes first?a) Add Possiblyb) Subtract Definitely notc) Random Number Possiblyd) Divide Possibly

e) Sine Definitely not

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GOAL

Group Exercise 1-4Concept: Dataflow

Identify dataflow execution order in the following blockdiagrams.

G E i 1 4


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DISCUSSION


Which node executes first? Last?Where are the data dependencies?

Group Exercise 1-4


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DISCUSSION


Which Express VI executes last?

Group Exercise 1-4


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DISCUSSION


Which Express VI executes last?

Group Exercise 1-4


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DISCUSSION

Group Exercise 1 4Concept: Dataflow

Which Tone Measurementexecutes last?


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I. Building a Simple VI

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Building a Simple VI

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Acquire Express VIs

DAQ Assistant Express VI

Instrument I/O Assistant Express VI

Simulate Signal Express VI

Read from Measurement File Express VI

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Analyze Express VIs

Amplitude and Level Measurements Express VI

Statistics Express VI

Spectral Measurements Express VI

Tone Measurements Express VI

Filter Express VI

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Building and Running a VI

1. Place Express VI on the block diagram.2. Configure the dialog box that opens.3. Wire Express VIs together.

4. Save and run the VI.

The Run button appears broken when the VI you

are creating or editing contains errors.

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Exercise 1 5 Part A Group Exercise


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GOAL

Exercise 1-5, Part A Group ExerciseSimple Acquire, Analyze, and Present Design

Scenario: Acquire a sine waveform 0.1 seconds. Determine the average value of the waveform. Log the data. Display the data to a graph.

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Exercise 1-5 Part A Group Exercise


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DISCUSSION

Exercise 1-5, Part A Group ExerciseSimple Acquire, Analyze, and Present Design

Which Express VI would you use for following tasks? Acquiring a sine wave from a data acquisition device Determining the average value Logging data to a file Displaying data to a graph Displaying average value

Exercise 1-5 Part B


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GOAL

Exercise 1-5, Part BSimple Acquire, Analyze, and Present VI

HOMEWORK

Create a simple VI that acquires data, analyzes data, andpresents the results.

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DISCUSSION

Exercise 1-5Simple Acquire, Analyze, and Present VI

How do you determine the file path of the generated text file?


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SummaryQuiz Answer

1. Which function executes first: Add or Subtract?a) Addb) Subtract

c) Unknown

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SummaryQuiz

2. Which function executes first:Sine or Divide?a) Sineb) Divide

c) Unknown

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SummaryQuiz Answer

2. Which function executes first:Sine or Divide?a) Sineb) Divide

c) Unknown

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SummaryQuiz

3. Which of the followingfunctions executes first:Random Number, Add orDivide?

a) Random Numberb) Dividec) Addd) Unknown

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SummaryQuiz

4. Which of the followingfunctions executes last:Random Number, Subtract or Add?

a) Random Numberb) Subtractc) Addd) Unknown

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SummaryQuiz Answer

4. Which of the followingfunctions executes last:Random Number, Subtract or Add?

a) Random Numberb) Subtractc) Addd) Unknown

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SummaryQuiz

5. What are the three parts of a VI?a) Front panelb) Block diagram

c) Projectd) Icon/Connector pane

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SummaryQuiz Answer

5. What are the three parts of a VI?a) Front panelb) Block diagram

c) Projectd) Icon/Connector pane

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End of Week 1

week 1 - labview student ambassadors_v1

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