7/27/2019 08312013 LABVIEW

1/19

INTRODUCTION TO

LABVIEW

By:

Aditya Chaudhary

7/27/2019 08312013 LABVIEW

2/19

Agenda

Brief Introduction

How does LABVIEW Works?

Components of LABVIEW

LABVIEW Conventions

Creating a VI

Induction Motor Simulation on LABVIEW

Applications

7/27/2019 08312013 LABVIEW

3/19

Brief Introduction

Laboratory Virtual Instrument Engineering

Workbench

Create programs using a graphical notation

However, it is much more than any programminglanguage.

It can create programs that run on a number of

platforms e.g. computers (running Windows, MacOS X or Linux), Microsoft Pocket PC, FPGAs,

DSPs and microprocessors.

Users Affectionately call LABVIEW as G

Language (for graphical).

7/27/2019 08312013 LABVIEW

4/19

How does LABVIEW Works?

A LabVIEW program consists of one or more virtual

instruments (VIs).

Virtual instruments are called such because their

appearance and operation often imitate actual physical

instruments.

However, behind the scenes, they are analogous to main

programs, functions, and subroutines from popular

programming languages like C or Basic.

Hereafter, we will refer to a LabVIEW program as a "VI".

Also, a LabVIEW program is always called a VI, whether

its appearance or function relates to an actual instrument

or not.

7/27/2019 08312013 LABVIEW

5/19

Components of LABVIEW

Front Panel Controls = Inputs

Indicators = Outputs

Block Diagram Accompanying program for front

panel

Components wired together

7/27/2019 08312013 LABVIEW

6/19

VI Front Panel

Front PanelToolbar

GraphLegend

Boolean

Control

WaveformGraph

Icon

Plot

Legend

Scale

Legend

7/27/2019 08312013 LABVIEW

7/19

VI Block Diagram

WireData

GraphTerminal

SubVI

While LoopStructure

BlockDiagramToolbar Divide

Function

NumericConstant

TimingFunction

Boolean ControlTerminal

7/27/2019 08312013 LABVIEW

8/19

Run Button

Continuous Run Button

Abort Execution

Pause/Continue Button

Text Settings

Align Objects

Distribute Objects

Reorder

Resize front panelobjects

Execution HighlightingButton

Step Into Button

Step Over Button

Step Out Button

Additional Buttons onthe Diagram Toolbar

Status Toolbar

7/27/2019 08312013 LABVIEW

9/19

Terminals

When you place a control

(orindicator) on the

FRONT PANEL

LabVIEW automatically

creates a corresponding

control(orindicator)terminalon the BLOCK

DIAGRAM

7/27/2019 08312013 LABVIEW

10/19

Control? orIndicator?

Controls = Inputs from the user = Source Terminals

Indicators = Outputs to the user = Destinations

7/27/2019 08312013 LABVIEW

11/19

Wires

A LabVIEW VI is held together by wires connecting nodes

and terminals; they deliver data from one source terminal to

one or more destination terminals.

7/27/2019 08312013 LABVIEW

12/19

Wiring Connections

Wires transport data

through the block

diagram

Wire color indicates

variable type

A red X means

something is wrong!

7/27/2019 08312013 LABVIEW

13/19

Broken wires

If you connect more than

one source or no source

at all to a wire,

LabVIEW

DISAGREES with whatyoure doing, and the

wire will appearbroken

7/27/2019 08312013 LABVIEW

14/19

Basic wires used in block diagrams

and corresponding types

Each wire has different style or color, depending on the

data

type that flows through the wire:

Scalar 1D array 2D array Color

Floating-point

number

orange

Integer number blue

Boolean green

String pink

7/27/2019 08312013 LABVIEW

15/19

LabVIEW Conventions

Front panel items Controls and indicators

Block diagram items

Program structures (loops, case structures, math, etc.)

Controls vs. Indicators Wires attach to controls on the right (give values)

Wires attach to indicators on the left (receive values)

Wiring colors Wires are color coded to correspond to data types

7/27/2019 08312013 LABVIEW

16/19

Control

Terminals

Block Diagram Window

Front Panel Window

Indicator

Terminals

Creating a VI

7/27/2019 08312013 LABVIEW

17/19

Induction Motor Simulationon LABVIEW

7/27/2019 08312013 LABVIEW

18/19

Applications

Virtual Design of Instruments

Data Acquisition

Signal Processing And Analysis

And many more

7/27/2019 08312013 LABVIEW

19/19

THANKYOU