labview overview

8/10/2019 LABVIEW Overview

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BY

V.BALAJI,

AP/EEEDCE

Introduction to LabVIEW


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2

PC, Mac, Linux, Sun

LabVIEW Everywhere

Networked I/O

PC Boards

Workstation

Handheld

Embedded(FPGA)

Industrial Computer (PXI)

Wireless

Sensor

Tektronix Open WindowsOscilloscopes


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LabVIEW

LabVIEW, which stands for LaboratoryVir tual I nstrumentation Engineer ing

Workbench , is a graphicalcomputing environment for

instrumentation, system design, andsignal processing, etc.


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This course prepares you to do the following: Use LabVIEW to create application.

Understand front panels, block diagrams, and icons andconnector panes.

Use built-in LabVIEW functions.

Create and save programs in LabVIEW so you can usethem as subroutines.

OBJECTIVES


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The Virtual Instrumentation Approach


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LabVIEW Graphical Development System

Graphical programming environmentCompile code for multiple OS and devicesUseful in a broad range of applications


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Virtual Instrumentation ApplicationsDesign

Signal and image processingEmbedded system programming

(PC, DSP, FPGA,microcontroller)

Simulation and PrototypingAnd more

ControlAutomatic controls and dynamicsystemsMechatronics and roboticsAnd more

MeasurementsCircuits and electronicsMeasurements and instrumentationAnd more

Design Prototype Deploy

A single graphical development platform


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OVERVIEWLabVIEW EnvironmentFront Panel

Block DiagramDataflow ProgrammingLabVIEW HelpDebugging a VI


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StartAll ProgramsNational Instruments LabVIEW 8.6

Startup Screen:

Start from a blank VI: New Blank VI

Start from an example:

ExamplesFindExamples

or

Open and Run LabVIEW


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Each VI has 2 windows

Front Panel User interface (UI)

Controls = inputs Indicators = outputs

Block Diagram Graphical code

Data travels on wires fromcontrols through functions toindicators

Blocks execute by data flow

LabVIEW Programs Are Called VirtualInstruments (VIs)


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Front Panel Controls Palette

Controls PaletteContains the most commonly used controls

All Controls PaletteShows all controls


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Controls Palette(Place items on the front panel window)

Indicator: Numeric Slide

Control: Numeric

CustomizePalette View


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Functions (and Structures) Palette

(Place items on the block diagram Window)

Structure:While Loop


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Run Button

Continuous Run Button

Abort Execution

Execution Highlighting Button

Additional Buttons on the Diagram Toolbar

Status Toolbar

Retain Wire Values Button

Step Function Buttons


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Block Diagram Window

Front Panel Window

Demonstration 1: Creating a VI

InputTerminals

OutputTerminal

BooleanControl

GraphIndicator


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NodesWires

ControlTerminals

Block DiagramFront PanelIndicatorTerminals

Creating a VI Block Diagram


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Data Types Found in LabVIEW


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Block diagram execution Dependent on the flow of data Block diagram does NOT execute

left to right

Node executes when data isavailable to ALL input terminals

Nodes supply data to all outputterminals when done

Dataflow Programming


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Debugging Techniques

Finding Errors

Execution Highlighting

Probes

Click on broken Run button.Window showing error appears.

Click on Execution Highlighting button; data flow isanimated using bubbles. Values aredisplayed on wires.

Right-click on wire to display probe; it shows data asit flows through wire segment.

You can also select Probe tool from Tools palette andclick on wire.


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Context Help Window

HelpShow Context Help , press the keysHover cursor over object to update window

Additional Help Right-click on the VI icon and choose

Help, or Choose Detailed help on the context

help window


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Tips for Working in LabVIEW

Keystroke Shortcuts Activate/Deactivate Context Help Window Remove Broken Wires from Block Diagram Toggle between Front Panel and Block

Diagram Undo (also in Edit menu)

ToolsOptions Set Preferences in LabVIEWFileVI Properties Configure VI Appearance,

Documentation, and so on


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Tips for Working in LabVIEW

Keystroke Shortcuts Activate/Deactivate Context Help Window Remove Broken Wires from Block Diagram Toggle between Front Panel and Block

Diagram Undo (also in Edit menu)

ToolsOptions Set Preferences in LabVIEWFileVI Properties Configure VI Appearance,

Documentation, and so on


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SUMMARYLabVIEW EnvironmentFront Panel

Block DiagramDataflow ProgrammingLabVIEW HelpDebugging a VI


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THANK YOU

labview overview

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