Search icon CANCEL
Subscription
0
Cart icon
Your Cart (0 item)
Close icon
You have no products in your basket yet
Arrow left icon
Explore Products
Best Sellers
New Releases
Books
Videos
Audiobooks
Learning Hub
Free Learning
Arrow right icon
Arrow up icon
GO TO TOP
Data Acquisition Using LabVIEW

You're reading from   Data Acquisition Using LabVIEW Transform physical phenomena into computer-acceptable data using a truly object-oriented language

Arrow left icon
Product type Paperback
Published in Dec 2016
Publisher Packt
ISBN-13 9781782172161
Length 150 pages
Edition 1st Edition
Arrow right icon
Authors (2):
Arrow left icon
Behzad Ehsani Behzad Ehsani
Author Profile Icon Behzad Ehsani
Behzad Ehsani
Yik Yang Yik Yang
Author Profile Icon Yik Yang
Yik Yang
Arrow right icon
View More author details
Toc

Table of Contents (12) Chapters Close

Preface 1. LabVIEW Basics FREE CHAPTER 2. Most Common Communication Buses 3. Using the DAQ Assistant to Automatically Generate LabVIEW Code 4. DAQ Programming Using LabVIEW 5. Debugging Techniques 6. Real-World DAQ Programming Techniques 7. Real-Time Issues 8. DAQ at a Distance - Network and Distributed Systems 9. Alternate Software for DAQ 10. Non-National Instrument Devices DAQ 11. LabVIEW and Simple Microcontrollers

Debugging - broken arrow


As mentioned previously, when a VI is "seriously!" broken, it does not run and a broken arrow is displayed. Since the error is immediately recognized by LabVIEW, usually in such particular cases, the fix is probably simple (unless a major design error is recognized). A more difficult situation maybe where there are no obvious errors, but the VI does not do what we intend it to do. We will now take a closer look at a version of a VI we used in Chapter 4, DAQ Programming Using LabVIEW:

When we run the preceding VI several times, we will notice a couple of issues with the VI. Note that a displayed array may be extended horizontally or vertically:

  • The array gets longer and longer and new values are appended to the end of the results from the previous run

  • There are blank array elements between the array entries (this was an error with the logic of the VI and we fixed it by adding a check for blank array elements)

To fix the issue, we know that we need to initialize the...

lock icon The rest of the chapter is locked
Register for a free Packt account to unlock a world of extra content!
A free Packt account unlocks extra newsletters, articles, discounted offers, and much more. Start advancing your knowledge today.
Unlock this book and the full library FREE for 7 days
Get unlimited access to 7000+ expert-authored eBooks and videos courses covering every tech area you can think of
Renews at $19.99/month. Cancel anytime
Banner background image