Test PC performance for certain LabView program

Hello,
I am interesting in how to check minimum PC performance for certain LabView program?
Thanks

I would say to look up the requirements for the RunTime Engine. If you think you need more processing power, increase your requirements some.
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Looking for simple labview program to handle photographs

I need to produce a program to allow a user to start a slideshow of images, and also to be able to click on an individual image and make it full screen. I am using Labview 7.1.1 on XP. Any example code would be greatly appreciated.
Thanks,
Howard Spec
CMC Electronics
Canada

Howard,
I have put together a slide show program which I use for my own presentations. However, it is in version 8.x and not in good enough shape that I would want to post it.
The program is a Producer/Consumer architecture. The producer loop has an event structure which monitors button presses (Value Change events) and mouse down on the thumbnail picture display. Consumer state enum values are enqueued in each event case. The consumer state machine has states: Next, Previous, Display, GoTo, Timed, Marker, Idle (default), Pause, Timer, Halt. Next, Previous, GoTo, and Timed simply set the index to an array of images. Prior to entering the loop the user is prompted to select a folder or directory containing the images to be used. A string array of the file names is parsed and converted to paths. (When I revise this the next time, this may stay path datatype rather than string to path. The file read may move inside the state machine in an Init case.) In the display state the index set above is used to select an image file from the array. I check the extension and select the Read JPEG File or Read PNG File VI to open the image. Property nodes do some scaling and zooming. The image is displayed two places. One is a thumbnail (about 200x300 pixels) on the control panel. The second is a full screen image in a Display subVI. This is set to occupy the second monitor (the projector) and fill the screen.
The Timed mode updates the display periodically. The user can set the delay. A Pause/Resume button is available. In the Manual mode large Next and Previous buttons and the Go To button allow the operator to navigate through the file list. The array of filenames is displayed for the user along with the currently displayed filename and the next filename. A large Elapsed Time indicator helps keep the operator on schedule. (I have been known to talk too much).
The Marker state allows the operator to click on the thumbnail image and place a circle (oval) at that point on both images. The position is detected at the mouse down event via property nodes. The operator can change the size of the circle, the thickness of the line, and the color. I am color blind and find the red laser pointers many people use to be nearly invisible. This marker approach is stable (no wavering hands holding the pointer) and the contrast and size is adjustable. I usually use black circles with a line width of 4 pixels as default.
Lynn

LabVIEW Program not running if i lock my PC (using an EXE made from LabVIEW)

Hi everyone
I observed some odd behavior when I was running my program on a PC. I prepared an EXE for a LabVIEW program, this am running on another PC. Purpose of the program is to read a text file and follow the command given in that text document, we are accessing parallel port, calling third party EXEs in this. It is not running when I minimize the window or lock the PC. Do we have any property in VI properties for this?
Please help me in this.
Thanks
Anil

Hi Anil,
Minimizing the application or locking Windows should not stop the executable from running. Can you reproduce this behavior on the development PC? Also try to create an executable with a simple VI that counts the number of iteration and check for this behavior ?
Tunde.

CPU usage is 98% when running my exe labview program

Hi
I have made an executable and installer for my labview program. When I install and run, the program uses a lot of cpu - almost 100%, even when the program is not computing. I recently changed over to LVIEW 8.2 from LVIEW 7.1. I had none of these issues with 7.1.
Programatically, I use a state machine to continuously execute the program. I also use a couple of while loops as slaves to plot the results processed in the main loop. In all while loops I have a 'Wait' until next ms' vi to prevent the program using all the cpu, but it doesnt seem to be helping in LVIEW 8.2. This is somewhat strange.
Can someone suggest what may be happening? and are there any methods that I can use to reduce cpu usage of my program?
Cheers
RVR

It will be impossible to really troubleshoot this without a lot of additional infomation.
Is the CPU usage only high in the built application, or is it also high if you run the same program in the 8.2 development environment?
Was the 7.1 program exactly the same, or did you make any modifications since?
Are you running 8.20 or did you upgrade to 8.2.1?
What does the program actually do? Does it interact with DAQ hardware? File I/O?
What does the program do when it is "computing"? Is the CPU use even higher then?
Is there also a wait statement in the main while loop?
What is your OS (windows, linux, mac, etc.)
Is your computer reasonable for the task. Enough RAM, etc.
How do the various loops communicate with each other? (queues, local-, global-, shared- variables, etc.)
How much data is exchanged between the loops? At what rate?
Do you use fixed or variable size arrays?
Can you give us a more detailed overview of the code?
How is the memory usage?
have you done any profiling?
LabVIEW Champion . Do more with less code and in less time .

Is SilverLight compulsory for running a Labview program?

Hi,
I am using a computer on which Silverlight isn't installed (the microprocessor doesn't have SSE instructions so I am not able to install it). While installing Labview 11 I got a message saying SilverLight isn't installed. I will test my labview program tomorrow (recording analog inputs with a Labjack U6 unit (usb connexion)).
Could anyone tell me if in this particular use of Labview (recording analog inputs + savind data to a file) SilverLight is compulsory?
If needed, here is the computer :
http://robosavvy.com/store/product_info.php?currency=EUR&cPath=39&products_id=1704
Thansk a lot
User
Solved!
Go to Solution.

What OS version are you using on this? 512MB for anything better but XP Embedded sounds really very short!
Rolf Kalbermatter
CIT Engineering Netherlands
a division of Test & Measurement Solutions

Develop & test a LabView program on a PC without DAQ card ?

Hello,
I am a LabView beginner.
I would like to know if it is possible to develop & to test a LabView
program for fast data acquisition (which uses double buffering) on a
computer that have no a DAQ card.
Many thanks in advance
Francesco Di Maio

I think see ur channel control string.It should include both index and channel number.may be u have entered config only ch0 not for others
so increament ur ch index and ch number,
I hope it will help u.
Haider

HP4275A can not pass self test after running the labview program

I am using Labview to control HP4275A LCR meter. The Labview program is just the instrument driver for the HP4275A, and it works great. Before running the program, the instrument can pass both Open and Short test perfectly. But after running the program, it can not pass self test, neither Open nor Short. I don't know why?? Is it relative to my Labview program??
Thanks

Thank you so much for your help. Yes, the instrument is in Local after running the instrument driver. In normal Open self test, just choose Capactiance as the Display A, and leave the four output terminals open then press the Self Test button. The Open self test will start and "OP" will be shown in the DIsplay A window, after 2 seconds, the open test will be finished. If something abnormal, the number of the abnormal step is displayed in Display A. Similar with the Short test.
The problem I had was: before running the instrument driver, the self tests pass; but after running the instrument driver, the Open and Short test show abnormal, Open test is abnormal at step 17, and Short test is abnormal at step 24.
And the instrument driver is only write commands into the instrument and then read back measuring values from it. Nothing else. So I am not sure if the problem is my instrument driver.
The weird thing is the problems happened several times and then if I do the Open and Short self test again after running the instrument driver, both pass. I am not sure whether the problem will come back or not.
Ia there any help??
Big thanks

Can any one please tell me how to write labview program for data logging in electric motor bike.

Can any one please tell me how to write labview program for data logging in electric motor bike. I am going to use CompactRIO for getting wide range of data from various sensors in bike. I need to write labview program for data logging of temperature, voltage and speed of the bike. Can any one help me?

Yes, we can.
I think the best place for you to start for this is the NI Developer Zone. I recommend beginning with these tutorials I found by searching on "data log rio". There were more than just these few that might be relevant to your project but I'll leave that for you to decide.
NI Compact RIO Setup and Services -> http://zone.ni.com/devzone/cda/tut/p/id/11394
Getting Started with CompactRIO - Logging Data to Disk -> http://zone.ni.com/devzone/cda/tut/p/id/11198
Getting Started with CompactRIO - Performing Basic Control -> http://zone.ni.com/devzone/cda/tut/p/id/11197
These will probably give you links to more topics/tutorials/examples that can help you design and implement your target system.
Jason
Wire Warrior
Behold the power of LabVIEW as my army of Roomba minions streaks across the floor!

How can i create a test suite in oracle for a java program

hi
i have to create a table for test cases for a java program
in that my main concentration is on branch statements
i have problems to choose which fields should be there in my table
plz let me know if you have nay ideas
thnx
regards
[email protected]

no idea based on the little or nothing you've posted.
%

I can not create an Installer, After install the Vision Builder Demo and then uninstall it. I can not create a Labview installer anymore, it asks me for a Vision Builder Installer, even if My Labview program does not have nothing to do with it...

I can not create an Installer on LabView, After install the Vision Builder Demo and then uninstall it. I can not create a Labview installer anymore, it asks me for a Vision Builder Installer, even if My Labview program does not have nothing to do with it...
Solved!
Go to Solution.

Hi Shada this can happen if you are including additional installers to your installer for example DAQmx. When you are doing this the installer has to include other files like MAX (Measuremente and Automation Explorer). Probably when you installed Vision Builder it updated MAX, so when your installer is trying to Include MAX, its asking for the source where it was installed in your computer in this case Vision Builder.
Here you can cache the information so its not asked again, or you can download a newer version fo DAQmx, so it will update MAX and change de dependecy.
You can find more details about this issue in this KB:
KnowledgeBase 3S88PJMY: Why Do I Get A "Missing Distribution" Error When Trying to Build an Installe...
And for keeping a copy here is more info:
How Do I Stop the Missing Distribution Notification Each Time I Build An Installer?
Best Regards
Benjamin C
Senior Systems Engineer // CLA // CLED // CTD

Using APT ActiveX methods to create a labview program for BPC 203 3 channel Benchtop Piezo controller

Hi Everyone,
I am really very new to Labview and i am in great need for some help.I am assigned a task where i am supposed to create a labview program to control or moniter a BPC203 3 channel benchtop Piezo controller. I created a program with the help of the instructions provided in the APT-Labview guide provided by Thorlabs.But th program doesnt run . Whenever i try to run it i get the same error which says that "Control HW Communications disabled".I have attached a snapshot of the error message.So i tried to create a small program in labview which would read the volage output.Even there i got the same error message.I suppose there is some mistake on my part which i am not able to correct due to the lack of proper knowledge.Could anyone please help me to solve this problem.A slight elaboration would be highly appreciated.Also i think the error lies in the use of invoke node with the get Voltage output method. I am not sure whether the parameters i have provided to the invoke node are correct.Any help of any sort would be highly appreciated.
Attachments:
Front Panel with error message.PNG ‏202 KB
Block diagram.PNG ‏101 KB

Hi
I had the same problem today. However, I noticed that the piezo controller has 3 channels with separate slots and they are packaged in the same box. Therefore the whole box has a serial number, probably something like 71822280, and this is written with large letter. Now, in order to communicate with any of the channels, this does not help, but one needs to communicate directly with the interested channel and they have thier OWN SERIAL NUMBERS.
For example channel 1 (my X direction in the nanoMax stage) has serial 91822281, Y has 91822282 and Z has 91822283. So try looking if you have the right serial number Hopefully you found out this yourself but this might help others, I took me3 hours to get this thing working when I started to plug-in the cables and everything.
Lasse

How do I make a labVIEW program for a linear CCD camera?

Hi, I'm pretty new at LabVIEW and I'm having a hard time figuring out how to connect my linear CCD image sensor (Toshiba TCD1304AP) with my computer. I know I need a DAQ device, what would work best for this particular CCD? After I got that connected, I need to create a LabVIEW program that displays the light detected by my CCD. Does anyone have a similar program or template I can use as a model? Any help would be appreciated. Thanks.

Hello,
I'm not sure the type of signal that is generated as an input to a DAQ device. This could either be an analog or digital input. The signal type will determine how you make your program in LabVIEW. You will also need to correlate the signal level to the light detected. That will be determined by your sensor. I don't have any programs or templates for this, but if you look at the basic analog or digital input examples, you might get a good starting point for DAQ device programming.
-Zach
Certified LabVIEW Developer

LabVIEW program crashes after running for few hours

Hello,
I am doing some experiments at the moment which are supposed to last for 18 hours.
Basically, I use a LabVIEW program to control a power supply through a LabJack U6 DAQ. I am currently using LabVIEW 8.5 on Windows 7.
In order to do that, I use a laptop where everything has been disabled such as power management settings, network access is off, windows updates are also off...
As far as I know, the computer can't turn into sleep mode or just shut down (I'm a 100% sure of that actually).
But last night, I started an 18 hours experiment at 5 pm, and when I came in this morning, the program shutted down by itself. Fortunately, the power supply is still providing the voltage I want, but I can't figure out why the program crashes.
When I start the experiment, it also automatically starting saving data in a spreadsheet file (I guess the size of the file should be 36 MB), so it might be a problem of memory access or something.
I really don't know what could have cause this crash, does someone have an idea?
I saw some other threads similar to my problem but I am not running an executable, I am running the front panel directly from the editing mode.

Hi,
thank all of you for your quick answers!
@Josborne : I do not have an error handling in my program. Actually you can look at my program in the attachment file. This is my first LabVIEW program so I've never dealt with error in and error out function... Moreover, what is a log file exactly?
@Johnsold : Yes, I am building an array continously growing over time. Actually, my program stops saving data when you hit the "STOP" button, it doesn't write into a spreadsheet file through a period of time, that is something I eventually need to correct.
@LabJackSupport : I can try to reduce my time step, so far it's 100 ms. I have a problem with disconnecting the USB cable from the computer though : for no reason, if I just unplug the connection between the LabJack U6 and the computer, my power supply will just go providing 157 Volts! And for my experiment, this is something we don't want to have so we just leave it as it is now. Disabling some part of the program is a good idea, I can try it
Thank you for your answers
Attachments:
Control Software.vi ‏511 KB

LabVIEW program for HP 4194A Impedance/Gain-Phase analyzer

Hi All,
I was wondering if anyone has a labview program already written for a HP 4194A Impedance/Gain-Phase analyzer.This instrument measures the impedance,capacitance,dielectricloss etc as a function of frequency.The problem is I have to write down each and every reading. I was wondering if anyone already has a program written for extracting the data and storing in a excel or a txt file.please post the program if you have it.
Thanks
Manoj

Here is an example. It represents some of my early work, but it is functional. With this one, you can get specific readings, or the whole sweep.
Attachments:
4194A Example.zip ‏191 KB

Password for labview program

Hi all,
I am developing a labview program for a high
power microwave device. The final program will
be running stand alone on a pc attached to the
microwave device in a laboratory. To ensure
safety, I am wondering if I can set up a password
to the labview program at start up so only
authorised people can use it? Or if there is
other way to do that. Any comment will be
greatly appreciated.
Thanks.
Regards
Hank
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In article <[email protected]>,
[email protected] wrote:
> Hi all,
>
> I am developing a labview program for a high
> power microwave device. The final program will
> be running stand alone on a pc attached to the
> microwave device in a laboratory. To ensure
> safety, I am wondering if I can set up a password
> to the labview program at start up so only
> authorised people can use it? Or if there is
> other way to do that. Any comment will be
> greatly appreciated.
>
> Thanks.
>
> Regards
>
> Hank
>
> Sent via Deja.com
> http://www.deja.com/
I am pretty sure that you can do that by using a case loop outside of
your main program. You can set it up so that user(s) will have to
enter a string (which would be password) before he/she can get to the
front panel of the main program.
Within this vi, you can have an array of strings such that users can be
given different passwords (or level of authority) for more security.
After the user enters the password, you can compare the user input by
using equal function in the comparison palette (make sure the password
list is case sensitive or stuff like that or you'll have to convert all
the user input string to either upper or lower case if you want to save
some trouble). If the result of comparison is true, then they can get
into the main program, or else the program will quit.
You can also put in looping structure to make it more fancy such that
each user can be given say 3 chances to enter the correct password...
If you want to go really fancy, you could also try to put in a data
file that stores all the passwords in binary format (requires a little
conversion, of course) in a directory of the target machine that you
know exist (say WINDOWS or WINNT), and include the data file as part of
your instalation disk content, point the installation destination to
that directory. In your password program, find the target machine
operating system and then look for the file from there.
Hope it helps. If you have any questions, please e-mail me at
[email protected], and I'll try to e-mail you a copy of my code.
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Test PC performance for certain LabView program

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