I would like to attain sample Labview Developers exams.

I was hoping to download sample exams to study for the Labview Developers Exam. I also want to know if the preperation course offered by NI for the exam is worth pursuing.

There is not a sample test, but you can download a pdf of the Tasks and Objectives that might covered on the test here. Look for the "Certified LabVIEW Developer" heading, then click the Tasks and Objectives link. There is also other information available on that page.
I didn't take the prep course, but a co-worker did and he did pass the test after taking it.
Ed
Ed Dickens - Certified LabVIEW Architect - DISTek Integration, Inc. - NI Certified Alliance Partner
Using the Abort button to stop your VI is like using a tree to stop your car. It works, but there may be consequences.

Similar Messages

What happened to this thread? -- LabVIEW poll "Features you would like to see in LabVIEW!"

What happened to this thread? --> LabVIEW poll "Features you would like to see in LabVIEW!"

Warren Massey -
Unfortunately, we were not able to migrate the polls and topics to the new system when we launched. The good news is that we still have access to the data and are investigating our migration options available.
We will also focus on getting some new topics and polls out to the community in the next few weeks.
Thanks!
Molly K.
Web Support & Operations Manager
National Instruments

I would like to know if labview can works with hp82335b interface

I would like to know if labview can works with hp82335b interface for instruments data aquisitions

Hi,
on following link: http://ftp.agilent.com/pub/mpusup/pc/old/hp_over.html
they say:
"The 82335 will not work under National Instruments Labview in any way, shape, or form. In general, it will not work on any product that doesn't specify that it does work.
There are no plans for any improvements to this product and no engineering resources on it."
In case this is true, you will go into trouble with
your card using LabVIEW.
Regards
wha

HT4009 I would like to know if app developers have the right to sell their digital items on other platform?

I would like to know if app developers have the right to sell their digital items on other platforms like Player Auction site.
Like playing "Dragonvale", they sell gems inside the game application, what if they sell gems ouside the app store, like they will sell it to a third party website or another platform like Player Auctions?
Thanks,
Mario San Pedro
[email protected]
marketing communication assistant

They won't work on the iPhone so I don't see what the point would be to do that, but you probably want to contact apple corporate and ask the question there. Or contact the developer of Dragonvale.

Features I would like to see in LabView to enhance documentation and transparency

Problem1: How to make the operator aware of what a logical structure is currently doing/waiting for.
Suggested solution: Introduce a "Header" in all the structures, including a structure NAME and a structure INFO and TEXT (all of which may be entered in ASCII, or fed a value from inside).
Nested structures may feed values "outwards", overriding the previous text in this field.
Thus, accessing the header of the structure "NAME" and retrieving its "INFO" you may actually get the "NAME" of the last activated sub-structure, and so forth.
Benefits:
a) In the code, the header will serve to enforce further documenting the purpose of the structure. On the top of a case structure (for example) you will always see it's NAME (i.e. "Machine Supervision") and for each case you feed a separate INFO (i.e. "Overcurrent has Tripped") and a TEXT (i.e. "Check this or that and press GO to continue")
b) As each case is entered (or "continually"?) the header is made globally available to a "Header info vi" or directly to a front panel object. Thus, on the front panel the operator may easily track the actions of the program. (i.e. This program is currently doing "Machine Supervision". It is currently in state "Overcurrent has tripped". The programmer now advices you to "Check this or that and press GO to continue")
Problem2: What really happened when things went wrong? There are many ways to solve this general problem, however...
Suggested solution: I would like a special "Event Printer" front panel object. That is, a fifo register where info may be entered (from the "Header" above perhaps) and where the last few events may readily be displayed for the operator, much like a solid state event printer.
Benefits: Allows the operator a nice means to track the operation of the program. (and the programmer an easy way of accomplishing it). Example printout:
|09.00 > "Initialization" |
|09.03 > "Machine Supervision" |
|11.42 > > "Overcurrent has tripped"|
(I can think of many options here, such as a selectable fifo depth, how much should be visible, scrollable or not, printing up/down or left/right, etc. This way you can make anything from a simple "current action" field, up to a scrollable historical event database from now, back to when the program was started.
If you have a really elegant way of doing the same with current vi's, I would be interrested to learn how.
Best regards / Ake Hansson

All this is functionality you can create coding your own VIs. It's nice that LabVIEW comes with in-built functions fro a lot of basic tasks..it even has a wealth of functions for very specific tasks...but you got to draw the line somewhere (and let third-party developers do the rest...).
Creating a functional global/que e.g. to hold the last status update from different processes and then read that status and display it on an indicator (or on the window status bar (using e.g. G Toolkit)) is straigtforward.
You can create a version of each structure with string constants or controls in the upper corner(s), fed into the functional global/que...save it in a VI that you put in the user.lib directory and then set the Merge VI option in the palette...you now have a
structure template with the header field and status que.
MTO

I would like convert a c++ dll for use in labview--my device has no labview dll

I have a piezoelectric control board (Piezomechanik gmbh) that I would like to use through LabView. Currently, the company does not offer any support for Labview. Windows sees the device (It came with a driver file), but the company only provides dll files for C++ and Visual Basic. Can I convert these files to a format Labview can use? How can I get Labview to communicate with the control board (and ultimately the piezoelectric device attached to it)? Thanks!
Solved!
Go to Solution.

This will only help you when you have the header file for the DLL, otherwise you will have to create the wrapper manually using the "Call library node" and the DLL api description or write an header file for the DLL yourself based on the api documentation and use the wizard.
Regards,
André
Regards,
André
Using whatever version of LV the customer requires. (LV5.1-LV2012) (www.carya.nl)

I would like to take the time to...

I find it absolutely necessary to share this with you, the reader - the community!
I would like to thank you, Firefox developers and all the rest, for: helping feed the poor in Africa; helping to end global terrorism; helping to keep children safe; helping to free women of the slavery that the patriarchy has caused; helping women to become independent and strong, and to become our future leaders and scientists; helping America; helping Europe; helping the world for a better tomorrow!
God BLESS Firefox; God GIVE Firefox all the support it needs, financially and otherwise; God MAKE Firefox the best product out there!
If it were not for Firefox, I would not be able to have my computer crash every time I start Firefox; I would not have my graphics card crash; I would not have Firefox send reports to whoever although I have clearly specified that it shouldn't do that; I wouldn't have to deal with constant Firefox crashes that take many minutes to recover from because the bug reporter runs in the background and sends information I don't want it to, to whoever I don't know, using up my vital resources and time.
THANK YOU! THANK YOU! THANK YOU!
If it weren't for you, indeed, I wouldn't even be making these remarks as I am bashing my keyboard, hoping that the creator of this dysfunctional, horrible, poorly made software, suffers just as I.
And you know what I think is amazing? Over TWO years - no, not one; not.. zero. TWO YEARS!--OVER two years and Firefox STILL crashes all the time, STILL does not perform properly, STILL is as terrible as it always has been.
Oh Lord Jesus, strike these heathens and these heathen-supporters down. Cause them suffering, for as you said, "Do unto others as you would want them do unto you" - and I would want myself to suffer if I were such a horrible person as they are.

Those problems have been reported in some iPads. Is the problem(s) in every one? Doesn't seem to be. There just seems to be a few batches/shipments with issues.
Has the problem been solved? Unknown.
The heat and battery issues seem to be fixable with a software/firmware restore. the wif issue seems to be ongoing and presumably the subject of a later fix.
Will you get one of these devices when you buy yours? flip a coin. No way to know until you get it.

High sample rate data acquisition using DAQ and saving data continuously. Also I would like to chunck data into a new file in every 32M

Hi:
I am very new to LabView, so I need some help to come up with an idea that can help me save data continuously in real time. Also I don't want the file to be too big, so I would like to crete a new file in every 32 mega bytes, and clear the previous buffer. Now I have this code can save voltage data to TDMS file, and the sample rate is 2m Hz, so the volume of data increase very fast, and my computer only have 2G ram, so the computer will freeze after 10 seconds I start to collect data. I need some advise from you briliant people.
Thanks very much I really appreciate that.
Solved!
Go to Solution.
Attachments:
hispeedisplayandstorage.vi ‏33 KB

I am a huge proponent of the Producer/Consumer architecture. But this is the place I advise against it. The DAQmx Configure Logging does all of it for you!
Note: You will want to use a Chart instead of a graph here.
There are only two ways to tell somebody thanks: Kudos and Marked Solutions
Unofficial Forum Rules and Guidelines
Attachments:
hispeedisplayandstorage_BD.png ‏36 KB

I would like to convert a continuous waveform (created in Labview with the waveform generator vi) into digital form...am I on the right track (see below)

I would like to simulate a sample and hold circuit. I was thinking of using the zero order hold vi (for continuous to discrete conversion) in combination with the AC to DC vi? Am I on the right track, or could anyone suggest a better way to do this? Many thanks in advance!

Hi,
The answer to this question was answered in the forum post below:
http://forums.ni.com/t5/LabVIEW/How-can-I-create-and-sample-and-hold-circuit-in-Labview/m-p/2369050#...
If this question is different then please clarify and let me know.
Regards
Arham H
Applications Engineer
National Instruments

I would like to read a text file in which the decimal numbers are using dots instead of commas. Is there a way of converting this in labVIEW, or how can I get the program to enterpret the figures in the correct way?

The program doest enterpret my figures from the text file in the correct way since the numbers contain dots instead of commas. Is there a way to fix this in labVIEW, or do I have to change the files before reading them in the program? Thanks beforehend!

You must go in the labview option menu, you can select 'use the local
separator' in the front side submenu (LV6i).
If you use the "From Exponential/Fract/Eng" vi, you are able to select this
opton (with a boolean) without changing the labview parameters.
(sorry for my english)
Lange Jerome
FRANCE
"Nina" a ecrit dans le message news:
[email protected]..
> I would like to read a text file in which the decimal numbers are
> using dots instead of commas. Is there a way of converting this in
> labVIEW, or how can I get the program to enterpret the figures in the
> correct way?
>
> The program doest enterpret my figures from the text file in the
> correct way since the numbers contain dots instea
d of commas. Is there
> a way to fix this in labVIEW, or do I have to change the files before
> reading them in the program? Thanks beforehend!

I used to working with Labwindow CVI and i would like to know how can i use the commands "loadpanel" and "Displaypanel " in Labview. Using Invoke Nodes?

I want to make another panel appears and runs, but i don´t want to use a subpanel. So, i would like to use somenthing similar to Loadpanel and Displaypanel, that you can use in Labwindows CVI, but in Labview, is ti possible?I hope your answers, thank you!!!

Hi Bichillo,
I posted an example here.
http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101&RPAGEID=137&HOID=50650000000500000014570100&HTHREAD=000087828&UCATEGORY_0=_49_%24_6_&UCATEGORY_S=0
It demonstrates how to do what you are asking.
I do not mind you laughing at the code.
Have fun!
Ben

I would like to detect all the keyboard key is okay, but not every key can be detected by using LabVIEW example, keyboard keycode

I would like to detect all the keyboard key is okay, but not every key can be detected by LabVIEW example ( we can use 『basic input demo.vi』to detect normal key』.
I want to detect some 『hot key』 for example some keys exist in the upper part like 『search key』、『e-mail key』、『volumn control key』...etc. They are very often to be watched in some new keyboards, but we still don't know how to detect if their functions are okay.
Can we detect signals of these 『hot key』 in LabVIEW? We can apply these hot key's functions in XP, so we should detect their signal, I think, but I can't do it.
I serach some information about this question, and somebody said we can detect hot key's signal by grabing 『keybode』 these hot key feedback. But I don't know how to do these. I can't use VC. So anyone can give me a LabVIEW VI to grab keycode? Or any other solution we can detect all the key on the keyboard, including hot keys?
Thanks!
Regards,

Maybe that is the limitation of Acquire Input Data.vi.The vi can't identify the Unformal key.
You can try to use Event structure and set to listen "key down" event.
There are two terminals VKey, ScanCode will sent out the information when you press key.
There are two pictures in attached file, 2.jpg will show you the detail.
Good luck.
Attachments:
SpecialKey.zip ‏17 KB

How to use an external start button for 6024E w/ sc-2345, I would like it to function like a start button in LabView but I don't know how to connect the external button to the sc-2345's connector block

I am confused as to how to connect my external start botton. I would like it to function like a start button on a front panel of a VI. I would like to use the +5V on pin 14 but I really don't know where to go from here. Any guidence for a novice would be most appreciated.

phod,
This is the LabVIEW Real-Time forum, so I suggest that in the future that you post this type of question to the Multifunction DAQ forum.
For the simplest solution you will have to connect your button to a digital line of your board, consult the sc-2345 user manual for a diagram of where these lines are exposed. You will have to connect your start button in series with a line that is high, such as your 5V pin or another digital line. Then connect this to a digital line that will be your start trigger.
Your program can poll the digital line that is connected to your button in a while loop and when it goes high, it lets the rest of the program execute. For the programming, I suggest you take a look at the shipping examples that come with LabVIEW. If yo
u have LabVIEW 7.0 go to Help>>Find Examples. Open Hardware Input Output>>Traditional DAQ>>Digital Input and Output>>E Series for some examples of digital I/O programming with E-series boards.
Hope that gets you started.
Gerardo

I would like to insert column headers into a Write labview measurment file

I am looking for a simple way to add column headers to my saved data. I
am working with dynamic data VIs and would like not to have to build
several arrays to do this.

See the attached VI, I think this is what you are looking for ... property node on a table, output of Build Table 2.vi, to which I feed a bunch of merged signals.
Certified LabVIEW Developer
NI-VLM Administrator
Attachments:
Name Columns.vi ‏20 KB

I would like to create a pop-up window appear from Labview Interface. In this window, I will have a slide control and an image taken from a camera. The main VI have to run while pop-up window is open. How can I do ?

When I pushed a button, this pop-up window has to appear. There will be a slide control and a picture from a camera in this window. Is it possible to make appear this windows while main VI Interface continue to run ? How can I do this ? Thank you for your answers.
Cyril.

Here you go. This is simple example. Maybe not the best way, I am just
beginner in LV and still not comfortable with data flow that much. I prefer
events, so I would change this to use Event Structures.
When you click on OK button on SliderMain, it opens Slider.vi. Now both
windows are open and you can interact with both. Now if you click on OK
again with Slider.vi open, you run into problems. Only thing I did was
change VI properties of slider.vi, mainly window appearance.
vishi
"Cy" wrote in message
news:[email protected]..
> I would like to create a pop-up window appear from Labview Interface.
> In this window, I will have a slide control and an image taken from a
> camera. The main VI hav
e to run while pop-up window is open. How can I
> do ?
>
> When I pushed a button, this pop-up window has to appear. There will
> be a slide control and a picture from a camera in this window. Is it
> possible to make appear this windows while main VI Interface continue
> to run ? How can I do this ? Thank you for your answers.
> Cyril.
[Attachment SliderMain.vi, see below]
[Attachment Slider.vi, see below]
Attachments:
SliderMain.vi ‏16 KB
Slider.vi ‏11 KB

I would like to attain sample Labview Developers exams.

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