Cycle average and RMS VI outputting unexpected value.

I have an application that performs FFT analysis on an AC voltage singnal. As part of the whole setup, I've also included the Cycle average and RMS vi. When I've run the whole program, I've found out that the RMS value indicated is less than the highest magnitude component from the FFT

Re: Labview 6.1 on Suse 9.0

After reinstalling LabView the problem was solved. Thanks Georgie

Re: Retrieving remaining hard disk capacity information while streaming to hard disk

Hi Allan Call the Voulme Info VI (File I/OAdvanced File Functions Subpalette) from time to time. This VI returns the information you want. Regards, Luca

Re: clearing the cursor legend programatically

I am using LV7. Bert

Re: Velleman PC Function Generator K8016

Hi, I am not sure that I understand the question? The velleman function generators come with a software (PClab2000?). You can download it from the download site, http://www.velleman.be/ and if you don't have a function generator, you can run it in demo mode. :-) Torsten

Can older daq pcmcia hardware work with Labview PDA?

Hi, has anyone tried older NI DAQ-Cards with Labview PDA? I just want to record simple waveforms, like with the cont. aq. to spreadsheet file vi. I read that there are only 4 new cards supported at this time. Can I use the dll for older boards as well? Truly yours, :-) Torsten Fregin

Re: how to plot multiple channels in a single chart

Got the Help Menu item and select 'Find Examples' Enter Graph There are lots of options Perhaps for graph basics:- Try the 'XY Graph.vi' sample in the 'Find Examples' menu item under help. The example shows multiple plots on one chart. Quote 'Use the XY Graph to display data that is not

Re: LV App Memory

We have a couple of large LV apps that run under Win9x/2k/XP environments. We're using LV 7 for development. When we launch the application (either built .exe or running within LV development environment) and watch the windows task manager, we see the app's memory usage increase. At the end

Re: smart text read

I need to read from a text file that has over 2000 Two-Column entries. What I want is to have the user input a data number, i.e 150, and have a sub-vi search the file for that value and retrieve the associated column with that value. However, since it is a big file, there needs to be an

Re: VI Link

Hallo Waldemar. Im Normalfall ist es so, wie du beschrieben hast ( Fall B ). Doch kann ich im Haupt-VI, von welchem das SubVI aus gestartet werden kann laut Hierarchie, keinen Link zum SubVI finden, weder durch Text- noch durch Objektsuche.

Re: LV App Memory

Hi Wiebe and James, I tend to believe you (Weibe)are on the right track with this line of thought. maybe the display has default values that are large but are over written when the app starts. The minimizing maybe clearing the un-do buffer. THat is just my first thought, Ben

Re: problem with 'unbundle' function

Double post. http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101RPAGEID=137HOID=50650005005C640100HTHREAD=91228UCATEGORY_0=_49_%24_6_UCATEGORY_S=0

Re: clearing the cursor legend programatically

Hi Bert, I posted the example in LV 6.1 becuase it will open in both 6.1 and 7! It demonstrates how to do what you asked and why the method you are using fails. Please look at my demo! Note: The For loop in your code is NOT sequenced with your other operations so it will not nessesarily

Re: How to turn off the new LV7 error probe while debugging?

Hello Wiebe again You are perfectly right. I have removed the file you mentioned and my old generic probe came in the place. Thank you very much, I quess we should not mention it to Kyle :. kind regards Pawel

Re: how to clear Multi COlumn List box

I have aMulti COlumn List Box Indicator in my program. This list box is updated while my program is running. When i stop my Program and start it again with out closing the Window. The new data is appended to the old data. Is there any way to clear the existing data in the list box when I

Re: clearing the cursor legend programatically

I am able to clear a graph legend when the program starts, but the legend will not populate with the new cursor names. The fields stay grayed out. There are multiple legends on a graph. The plot legend is for plot properties, the cursor legend for cursor properties, and the scale legend for

Re: Will Labview work with Windows 2000 Advanced Server

I have a computer with 12 Gbyte of RAM. I must use Windows 2000 Advanced Server in order to recognize at least 8G of the RAM. Will Labview work with this operating system? I think it will be fine. I have heard of people using the server edition of NT and 2000. I'm not certain that is the

Re: How to turn off the new LV7 error probe while debugging?

Since I am complaning I must say that most of the inventions in LV7 does not work for me. Fancy icons for controls, strange looking bad wires, completelly useless menu, etc. The only reason why I stick to LV7 is the dynamic events. Otherwise I will uninstall it ASAP. I guess that NI forgot

Re: Combining LV Application and NIDAQ Installer on One CD

when in application builder if you create an installer and select the advanced button, you can run another installer using the run executable after installation option. All you need to do is put in the command line and command line arguments. This will install any installer after the executable

Re: Triggering a DIO line based on AI value.

check out some of the examples that specify hardware triggering. Basically it is monitoring a pin on the counter out put that you will trigger using the gate. If you are familiar with counters you can trigger an output using the gate input. Hope this helps.

Re: File Permission Error (8) when trying to delete file

Hi Don, I believe I heard Jean-Pierre explain this as having to do with the file system and delays in the file actually being closed. There are lots of things that cuase this delay while running in a Windows OS. This may be due to the fact that the file system does not know the file is closed

LabView 6.1 Full Development Version: Compare VIs

I'm working with LabView 6.1 Full Development Version. Why does my collegue who has the same version has a function in LabView which allows him to compare two VIs? What did I do or didn't I do that I can't find this function? (It is not in the menu where it should be.) Thanks!

Re: problem with 'unbundle' function

hello, i cant read the LV6.1 binary executable you sent me because of an older version of labview. would you send it to me in the former version? thank u so much, guillaume

Re: Your pallot VI 'One Button Dialog' doesn't have a button.

Two things that I can think may be causing it. Old video drivers or something corrupted in LabVIEW. Try updating your video card drivers first, if that doesn't help, you might have to reinstall LabVIEW. Ed

Re: Can clusters be replaced by unbundle, bundle functions so that my prgm turns PDA compatible.

Why are you using clusters at all. You just could use three single buttons and handle them as array or if you have to bundle them programmatically in an array. greetz Chris

Re: Can clusters be replaced by unbundle, bundle functions so that my prgm turns PDA compatible.

I'm not sure why you don't think an event structure won't work but if you're not comfortable doing that, you can simply remove your Booleans from the cluster and build them into an array. You're converting the cluster to an array and doing a search of the array to see which button is true so why

Re: Plotting x and y when user asks for it

Hi, Thanks for that example. It was very helpful. I am able to make my vi work now. Thanks.

Re: VI Link

Hallo Jan, meines Wissens nach gibt es 3 M=F6glichkeiten ein VI zu laden. 1: Statisch gelinkt als SubVI 2: =DCber die Funktion Open VI Reference aus einem bereits geladenen VI. 3: =DCber die Funktionen Open Application Reference und Open VI Reference in einer fremdem LV Anwendung. Im Fall 1

Re: Why does priority of NON RUNNING vi affects execution time of

You are welcome! There was a pay-off for me in this game. We will probably be using this example in the LV Intermediate course we teach if the instructors are asked to demonstrate this behaviour. Ben

Re: problem with 'unbundle' function

thanks, now i understand best how it works. Unfortunately the data i collected cant be collected again (clinical data). Actually i am able to plot the entire data set (recorded in the bundled format) after the acquisition. but what i finally want to do is to display ma data point by point. Do u

Re: foremost window losing its property

Today I ran the vi on a windows XP, Pentium 4, LabView 7, system, and it showed the same behavior. Now, How did all this happen ? I converted an application from LabView 6.02 to 7, and started seing that behavior. Similar applications in Labview 5.1, 5, 4.1, 4, 3.1 worked correctly. I also

Re: Getting started - help with general concepts?

Having used LabVIEW, VB and C/C++, I can say that the first tool I reach for is _always_ LabVIEW. Nothing else comes close in terms of ease of use, maintainability, and user-friendliness. That said, I don't consider LabVIEW a silver-bullet. If you need your application to to complex 3D

Re: SCAN FROM STRING

I've solved my problem with %.;%f . Thanks to all the people for your help. IMMA

Current time on the X-axis

I am following the Real-time.vi in trying to get my chart to display true time on the x-axis, but, when I apply the method to my own vi, the time on the chart is off (for example: (24-hour) 10:55 true time will read 32:24 on the x-axis. How do I fix this?

Re: Three-PC network clock

Hello Michal, Thank you for your question regarding DataSocket. It sounds like you would like to synchronize three classrooms using LabVIEW. DataSockets seem like the obvious tool for this project. This allows you to efficiently pass data over the Internet, and respond to multiple users without

Re: File Permission Error (8) when trying to delete file

Hello Don, Are you opening multiple files? If so, a href=3Dhttp://digital.ni.com/public.nsf/websearch/7A2BA0127EF8AB7B862565870= 04E35FB?OpenDocumentthis/a knowledge base may apply to your case. If this doesn=92t help, or if I=92m not correctly understanding your issue, please post the software

Re: need to program vi to correlate 2 signals from large data files

Can you send me the same code in Version 5.1.. I am having some trouble opening the file...Thanks!

Re: C like structures in Labview

Thats exactly what I was looking for! Accessing the cluster as a local or global variable allows read and write, similar to a structure in C. Thanks, Lou

Re: Three-PC network clock

Hi Shea, thanks for your answer. I've already programmed the whole thing using TCP. However, datasocket sounds like a simpler solution; I'll have a look at the resources you recommend. regards, M,-

Re: analog modem remote panel web publisch

Hello Temptanner, Each front panel object update is called a message to the remote panel server. The client has to be able to keep up with the messages that the server is sending. There is a maximum message backlog that the server will allow that is configured with the following setting:

Re: How to turn off the new LV7 error probe while debugging?

I quess we should not mention it to Kyle :. Hello all, :-) It appears that I should have said that there is no isupported/i way to change the default behavior. As you all have discovered, there is no setting for disabling the smart probe in the 'training wheels' options. I am a bit

Re: Cycle average and RMS VI outputting unexpected value.

two general observations 1) the differences in the RMS value an the highest magnitude in the FFT may be due to scaling, 0 to peak vs RMS in the FFT 2) the cycle average VI is a good one to use, however the default percentage of full scale numbers are very tight. These determine how many true

Do you have a VI that create a step analog output voltage...

Do you have a VI that create a step analog output voltage (for example: a voltage that increases of .1 V from -10V to 10V) Thanks

Re: Error Thread.cpp Line 1938

Hello Sly, Are you, by chance, running on a Dell Dimension 4500 Slimline Series desktop (or similar model)? Due to limited PCI slots on some of these models, they require a PCI expander/splitter that allows for 2 PCI devices to be plugged into the same slot. You may have the GPIB card and the

Re: How do I communicate with VME Bus via IOWorks? Visa Session?

yes the OPC client is a data socket function. You should be able to find the example in the communications examples of the labview/examples folder. prestonj

Labview 6.0 x LabView 7.0 list of enhancements or new features

Hi, Have u a 1 page document with the main enhancements or new features, that we can base our decision to upgrade (or not) to version 7.0 ?

Re: Error Thread.cpp Line 1938

Hi Robert, I do have a Dell PC, but it's a Dimension 2400. I do not have a GPIB card on my system. The only card that I have is a network card. I got the same error today, but it also included a bunch of Open File VI errors with it. Don't know if that will help. Also, something that I forgot

Re: Velleman PC Function Generator K8016

Hi Wayne, I don't think we have any specific examples for that function generator. There is an old discussion thread that includes some information on communicating with one: a

Re: Labview 6.0 x LabView 7.0 list of enhancements or new features

LV 7 FAQS: http://www.ni.com/support/labview/lv7faq.htm

Passing a pointer to a Call Library Function

I have read Controlling an Instrument That Requires DLL Functions That Use Pointers to Complex Data Structures, Document ID: 2A5F7J5C, but need to start with a simpler example. I need to pass a pointer to an instrument vendor's C dll. In their reference manual they define the function as int

Re: Do you have a VI that create a step analog output voltage...

Meant to say Ramp Pattern function.

Re: Velleman PC Function Generator K8016

Hello Wayne, Unfortunately, there are no examples specific to the Velleman PC Function Generator K8016. What exactly are you trying to do? If you are trying to acquire a signal from the function generator through your DAQ board into LabVIEW, try the =93Cont AcqGraph (buffered).vi=94 example.

Re: problem with 'unbundle' function

Thank you, guillaume

How can I read the file created date info for a file?

Fileinfo.vi can read the file info modified date. Is there any vi simular as fileinfo.vi that can read the file info of file created date?

Re: I must push the enter button to press OK with my One button dialog box

SebuS, I tried opening your VI in LabVIEW 6.1, but it gave me the error msg that the VI is actually LabVIEW version 7.0. Also, I ran your sequence in TS2 with this LabVIEW 7 VI, and it works just fine to click the OK button. I'm sorry I've not been able to replicate this problem for you. Do

Re: How can I read the file created date info for a file?

Grab the attached VI's from my answer on a href=http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101RPAGEID=137HOID=506500050011450100HTHREAD=83217UCATEGORY_0=_49_%24_6_UCATEGORY_S=0;this/a discussion. It does what you want, but only works on Windows. Ed

Re: Help! Can't open Labview program with MATLAB codes !!!

Thanks so much. It works for me by replacing the old dll file.

Re: Can I use active X buttons and dynamic events in a remote pannel?

Hello, Thank you for contacting National Instruments. I believe the reason you are experiencing problems is because ActiveX controls embedded on a front panel draw and operate almost completely independent of LabVIEW. In fact, unless you have the same ActiveX object installed on a remote

VISA ERROR(hex 0xBFFF0011)

Hi, there, I've programmed a VI that communicates via USB TMC with an instrument. Works fine on the Computer (Window 2000 with LV 7.0 Full Development), where I developed the VI. I built an application of this VI. Works fine on the Computer, where I developed. When I try to portate it on

Re: VISA ERROR(hex 0xBFFF0011)

Seems like your instrument is not being found on the second computer. Most likely, your instrument drivers have not been properly installed. If using VISA, you must have VISA drivers for that instrument installed on the computer you are using to connect to that instrument. You can use MAX

Warning 1073676424 from VISA Set I/O Buffer Size.vi on a serial port

I am porting an application from LabVIEW 6.1 on Windows to LabVIEW 7 on OS X (Mac). It was very painless except some GUI modifications. The application involves 30 KB data from a instrument through a RS232 serial port. I found the application misses data whenever the computer is busy. The