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LabView Seminar. University of Puerto Rico Mayagüez Campus. Outline. What is LabView ? Generate a new graphical programming Applications design Type of data used in LabView Examples My first program. What is LabView?. Virtual Instrumentation

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LabView Seminar

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Labview seminar

LabView Seminar

University of Puerto Rico

Mayagüez Campus

V1: HMFR, 2006. V2: MFNB, 2007


Outline

Outline

  • What is LabView ?

  • Generate a new graphical programming

  • Applications design

  • Type of data used in LabView

  • Examples

    • My first program

V1: HMFR, 2006. V2: MFNB, 2007


What is labview

What is LabView?

  • Virtual Instrumentation

    • It is a software module that simulates the front panel of an instrument.

    • When using a VI, the user sees in the computer monitor a screen that looks like a physical instrument

      • Oscilloscope

      • Function generator

      • Multimeter

V1: HMFR, 2006. V2: MFNB, 2007


Generate new application

Generate New application

  • Go to Start and search LabView Shortcut

  • This window should appear

Select New…

V1: HMFR, 2006. V2: MFNB, 2007


Graphical programming

Graphical Programming

  • Front Panel and Block Diagram

Block Diagram

Front Panel

V1: HMFR, 2006. V2: MFNB, 2007


Graphical design

Graphical Design

  • There are libraries that consist of numerous types of tools, controllers, indicators and functions.

  • FRONT PANEL: Controls (Controls and Indicators)

  • BLOCK DIAGRAM: Functions

V1: HMFR, 2006. V2: MFNB, 2007


Graphical programming1

Graphical Programming

  • Make the following VI

  • How I search HELP?

Vertical Fill Slide

Tank

Round LED

V1: HMFR, 2006. V2: MFNB, 2007


Graphical programming2

Graphical Programming

  • To show the digital display:

    • Right click over the objects (Slide1, Slide 2, Tank)

      • Visible item

        • Digital Display

V1: HMFR, 2006. V2: MFNB, 2007


Graphical programming3

Graphical Programming

Front Panel

Block Diagram

Add and Greater instructions must be included

V1: HMFR, 2006. V2: MFNB, 2007


Graphical programming4

Graphical Programming

  • Change the object values and caption.

    • Click over the slide value and caption and then insert this new values (0 – 10).

    • Do the same for the second slide (0 – 10) and the tank (0 – 20).

  • Make all connections as depicted on the Block Diagram.

V1: HMFR, 2006. V2: MFNB, 2007


Graphical programming5

Graphical Programming

  • Run the application using this button

    • What was the behavior?

  • Run with this other button

    • To stop use

  • The differences between Run and Run Continuously are:

    • Run execute the program only one time. A while loop control the code

    • Run continuously do not depend of any loop

      • Problem: The program could enter in an infinite loop, and scratch windows.

  • Debugging

V1: HMFR, 2006. V2: MFNB, 2007


Using loop

Using Loop

  • Select While Loop

    • Right click over the circular red button of the while loop

      • Select Create a Control

  • Run

V1: HMFR, 2006. V2: MFNB, 2007


Type of data used in labview

Type of Data Used in LabView

  • Boolean (light green): This type of data can have the values 1 (true) or 0 (false).

  • Numerical (orange or blue): There are different data type, by example, double, integer, etc.

  • Strings (pink): stores characters as in a one-dimensional array.

  • Clusters (brown or pink): A cluster can store several types of data (strings, arrays, Boolean, etc.)

V1: HMFR, 2006. V2: MFNB, 2007


Labview seminar

HELP

  • In menu, select Help and Show Context Help

V1: HMFR, 2006. V2: MFNB, 2007


Example 2 formula node

Example 2: FORMULA NODE

V1: HMFR, 2006. V2: MFNB, 2007


Labview seminar

DAQ

  • Single-Point Acquisition

    • A single point acquisition is an immediate, non-buffered operation.

    • Only one data point is obtained.

    • This type of acquisition is useful when no timing information is wanted.

V1: HMFR, 2006. V2: MFNB, 2007


Labview seminar

DAQ

  • Buffered Waveform Acquisition

    • This method is utilized to perform accurate multi-point acquisitions.

    • A specific number of data points are recorded at a predetermined scan rate (sampling frequency) and stored in a buffer.

    • The data stored in the buffer is then retrieved by the VI and displayed on the screen.

    • This type of acquisition is useful when recording high frequency signals and when accurate timing information is wanted.

V1: HMFR, 2006. V2: MFNB, 2007


Daq config input

DAQ Config Input

V1: HMFR, 2006. V2: MFNB, 2007


Daq config input1

DAQ Config Input

V1: HMFR, 2006. V2: MFNB, 2007


Daq config output

DAQ Config Output

V1: HMFR, 2006. V2: MFNB, 2007


Daq config output1

DAQ Config Output

V1: HMFR, 2006. V2: MFNB, 2007


Daq single point

DAQ Single Point

V1: HMFR, 2006. V2: MFNB, 2007


Daq buffered

DAQ Buffered

V1: HMFR, 2006. V2: MFNB, 2007


Questions

Questions

V1: HMFR, 2006. V2: MFNB, 2007


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