Use of FindLstn in Labview

I'm struggling with the Findlstn function in Labview. It's returning "Labview: Configuration Token not found", and "NI-488: Table Error". I'm guessing the format of my address list input isn't correct - I'm using a 1-D array of word - but can't find an example or relevant guidance on the error messages.
Solved!
Go to Solution.

The specific issue here was that if you left the limit input unwired, it defaults to zero, which generates the error condition. You need to wire a non-zero value to the limit input, such as the size of the array that you are providing for the list of GPIB addresses to check.
Note that you can also use the VISA Find Resource function.

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How do we use if statement in labview?moreover can i use if statement inside for loop?

how do we use if statement in labview?moreover can i use if statement inside for loop?

The if statement in LabVIEW is the Case structure. You can find that on the Structures palette right next to the For Loop. If you're still on the same subject about terminating a for loop early, then what you do is enclose your functions inside the loop with a case statment and make one of the case's empty except for one or more constants that you might have to wire. Hopefully, the attached picture will explain what I mean. Also, as I mentioned in one of your other posts, I think this technique is not as good as using a while loop. The array in the attached example is the same size no matter what and you may have to handle stripping extra or invalid elements.
Attachments:
For_Loop_with_Case.jpg ‏21 KB

How to implement a dual booting PXI system using windows 7 and labview RT

Good Day
My name is Mariano Ocana from the University of Manitoba, and I want to implement a dual system using windows 7 and labview RT in a PXIe-1082 chassis with a PXIe-8102 embedded controlled (the chassis came with windows 7 installed). What are the steps to use both systems (windows and RT) in the same chassis?, in the NI help comes an example implementing a dual system using windows xp and RT, it is the same procedure?.
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Regards
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Greetings, Mariano.
The real issue you have to contend with is whether or not you have a LabVIEW RT license. If the 8102 controller was purchased Windows-Only, you likely do not have a license to run LabVIEW RT on the controller - you can purchase one, I think it's about $500, and at that point you can request a LabVIEW RT Configuration CD (that's not what it's called, but the sales guy will know what I'm talking about). The Config CD is a CD that will partition your controller correctly with both FAT32 and NTFS filesystems (in the appropriate way) to allow you to run Windows 7 and LabVIEW Real-Time on the controller correctly. Once done, you can then switch within the BIOS between LabVIEW Real-Time and Windows in order to dual-boot.
Either way, you likely need to contact NI sales to either purchase an RT license (if one was not received at the time of purchase) or to request a Configuration CD (it might also be called a dual-boot install CD or similar).
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Getting the data in file using DAQ assistant in Labview

I am using SCXI 1000 chassis, SCXI 1125 input module and SCXI 1320
terminal.
I am using DAQ assistant in labview to obtain temperatures and store it in
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generated during this time to be stored in a single file, but I am unable
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Can someone please give me some insight as to how can I achieve this?

Hi Mr,
It would be helpful to see your code to see exactly how you are acquiring the data. Are you doing continuous buffered measurements? Or are you performing single point temperature measurements in a while loop?
Either way you will want to use the "write to spreadsheet" VI in your loop. Simply wire your data into the "write to spreadsheet" vi and se the "append to file" input to TRUE. This will make the data add on to the end of the file with each iteration of the loop. The "write to spreadsheet" VI is located in the file IO pallette in LabVIEW.
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Build a DLL in LabVIEW & Use the DLL in LabVIEW

I am trying to build a DLL for the simple vi with LabVIEW and want to use the DLL in LabVIEW. is it impossible?
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I want to use this DLL in new vi with LabVIEW.
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pleas refer to the attatched file and let me know what I missed.
Attachments:
Array1D.zip ‏60 KB

At first I kept scratching my head wondering why someone would want to do this. Create a DLL in LabVIEW to call it from LabVIEW. Seems redundant. But, perhaps it's an exercise or perhaps it's for testing the DLL...
In any event, calling the DLL worked for me in 8.2. How are you configuring your Call LIbrary Function node? I have it set up as follows:
return type: void
iteration: Numeric, Signed 32-bit Integer, pass by value
array1D2: array type, Signed 32-bit Integer, 1 dimension, "Array Data Pointer" format
len: Numeric, Signed 32-bit Integer, pass by value
Then I called the DLL like this:
Message Edited by smercurio_fc on 03-16-2007 12:57 PM
Attachments:
Example_BD.png ‏2 KB

How to generate a chirp(linear FM) signal using dds theory in LabVIEW FPGA.

how to generate a chirp(linear FM) signal using dds theory in LabVIEW FPGA.
attachment:a sine signal using dds theory. Hope to get some help. Thanks!
Attachments:
FPGA DDS SineGen IP.vi ‏42 KB

you need to increment the "accumulator increment" during the duration of the chirp. the "accumulator increment" controls the frequency of the DDS cycle. by increasing it's value, you are increasing the frequency. the math for increment values follows the same math as determining the frequency to increment value.
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Viewpoint Systems, Inc.

How to use crystal reports in LabVIEW

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Regards,
Rajashekar

activeX

How can i use activeX Control in labview?

how can i use activeX Control in labview?
please describe me step by step.
thanks.

Well..that was quite helpful..but now I'm encountering certain problems. I've attached the VI I've made.
I don't need sound at the moment so I dropped it. (Although I tried to play it..but all I could hear was a very annoying sound.) Secondly I don't want to display any date or time..so i dropped that property too.
Now when I run this Vi...the webcam turns on, the screen of videocapx pops up..then the webcam light goes off..and another pop up appears saying..labview is not responding..and i have to close it reluctantly.
I haven't placed the stop capture property in this vi. i checked it by placing it too..but that doesn't work.
I would like to notify that my actual task is to acquire image and then compare it with another one already present on my pc. I want you to please help me out..solve my first query then I'll proceed with the latter part.
Attachments:
activexvideocaps.vi ‏20 KB

How to measure voltage changes using a NI-9219 with strain gauges and use the data in labview

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Hi Coffeyfj,
Did you ever had this set up working? The first thing that I would do as I mentioned in the previous comment would be to use one of the LabVIEW examples. I recommended to you using the (strain - Continuous Input.vi). If you can read any voltage changes with the example vi, then we will know the problem we are having is in your code. If you cannot read any voltage changes using the example I mentioned, we can start trouble shooting the hardware connections. Are you connecting the excitation voltage? If yes, Are you making the right connections. Please refer to page 19 of the following document (half and full bridge modes)
NI 9219 Operating Instructions and Specifications - February 2009
http://digital.ni.com/manuals.nsf/websearch/4197ED4BD126E0B486257546005851CA
Regards,
William Fernandez
Applications Engineer
National Instruments

How can I use USB interface in Labview?

Hi.
Does labview allow to USB interface?
I have been seen allowing GPIB and RS232.
I'm beginer at Labview and wanna use USB interface for my target system and pc.
I wanna know how to labview interfaces from target system to pc.
And if Labview doesn't provide USB interface module, how can I use USB?
Is using a USB at Labview hard to beginer?
Plz, answer to my quetion.
sorry, my English is very poor.
thx for reading my article.

You can access devices connected to the USB port, but not in the same way as you would a GPIB or RS232 device. There are no USB drivers like there is VISA for GPIB or serial. Rather devices that plug into the USB appear to the systen as some sort of standard resource like a printer, disk drive or IO board. LabVIEW then interacts with these devices as it would any other device of the same type.Look at it this way, if you have a USB daq device you will access it through MAX the same as if it were a plugin card. Mike...
Certified Professional Instructor
Certified LabVIEW Architect
LabVIEW Champion
"... after all, He's not a tame lion..."
Be thinking ahead and mark your dance card for NI Week 2015 now: TS 6139 - Object Oriented First Steps

Can I use C code in labview?

Hello, I've got a fairly complicated program I've written in C that
requires two doubles to be passed to it and it spits out two integers
as a result of a very detailed calculation. Is there a way to have
labview call this C function? I've tried searching the NI.com website
but all I could find were examples where labview was being compared to
C in an attempt to show how they are equal. Any advice/links to
relevant information or tutorials would be greatly appreciated.

You have two possibilities:
Compile your C code into a DLL and call it with "Call Library Function Node".
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The LabVIEW Bookshelf (under help) contains a PDF document name "Using external code in LabVIEW". It will probably answer all your questions. Good luck
LabVIEW Champion . Do more with less code and in less time .

Can I use IF-RIO with LabVIEW 8.20

I am going to upgrade my LabVIEW to 8.20 but I am not sure whether the driver of IF-RIO can work with it properly.
Does anybody know this?

Hi,
My customer get problems when using PCI-5640R in LabVIEW 8.2, but they could work in LabVIEW 8.0. Is there any latest NI-5640R driver support LabVIEW 8.2? Or PCI-5640R only works in LabVIEW 8.0?
Operation system and environment:
LV 8.2
LV FPGA 8.2
NI-5640R 1.1
NI-RIO 2.1.3
Display error message in LV 8.2 FPGA complier server.
An internal software error has occurred. Please contact National Instruments
technical support at ni.com/support with the following information:
Error 1003 occurred at Open VI Reference in
nirviGetModInfo___nirviEIOImplementation_modGen.vi->nirviGetModInfo___nirviE
IOImplementation_modGen.vi.ProxyCaller
Possible reason(s):
LabVIEW: The VI is not executable. Most likely the VI is broken or one of
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verify that it is runnable.
VI Path: C:\Program Files\National Instruments\LabVIEW
8.2\resource\RVI\StockIO\private\StockFPGA_io_modGen\nirviGetModInfo_StockFP
GA_io_modGen.vi
Please refer the attached reproducable example code.
Best Regards
NITW AE
Gary
Attachments:
UsingFilterCore.vi ‏550 KB
filt20070509104003.zip ‏255 KB

We collected data using NI in the Labview environment and created tdms document. Is there a reader for reading the data in Matlab environment?

We collected data using NI in the Labview environment and created tdms document. Is there a reader for reading the data in Matlab environment?

A search will often turn up results.
Reading TDM/TDMS Files with The MathWorks, Inc. MATLAB® Software

Controling wheelchair by speech command using Neuron Network in labview

Hi all,
I'm doing project about "controling wheelchair by speech command using neuron network in labview". I found some informations about controling whelchair combine with function microsoft speech recognition in window or something like that but this was not my point. So, I have some question about that:
1) How do I store the command "Left-Right-Back-Go-Stop" in labview. After that, analyzing to find the differences of characteristic of these command.
2) Based on these characteristic above, using neuron network to find exactly command.
Are there anyone do like this before? I need all help from you.
Thank you so much.

Greetings;
First, it is most excellent that you have gotten to where you can compare the words being said to the sample.
If I understand correctly, you are interested in continuously acquiring sound, saving it and then comparing it with the sample? That is not as straightforward as it sounds simply because it would be difficult to realize when there is sound in the first place and when that sound is relevant.
I would probably start by figuring out whether there is or not sound by comparing the microphone input to a certain threshold, saving if there is sound, and then halting the recording when the sound stops. It would be then that you would compare with your samples via the algorithm that you have made.
In order to check for volume, I came across the following example:
http://zone.ni.com/devzone/cda/epd/p/id/2150
It was mentioned in the following discussion:
http://forums.ni.com/t5/LabVIEW/Microphone-Input-Detection/td-p/487367
Cordially;
Simon P.
National Instruments
Applications Engineer

Using Shared Memory in LabVIEW

I'm trying to use shared memory with LabVIEW. Can I use it, a DLL in C with LabWIEW for use shared Memory?

Lidia,
Check these out (for memory mapping):
http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101&RPAGEID=135&HOID=5065000000080000006A1D0000&UCATEGORY_0=_318_&UCATEGORY_S=0&USEARCHCONTEXT_QUESTION_0=build+cvi+shared+dll&USEARCHCONTEXT_QUESTION_S=0
http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101&RPAGEID=135&HOID=5065000000080000005BC10000&UCATEGORY_0=_49_%24_6_&UCATEGORY_S=0&USEARCHCONTEXT_QUESTION_0=Communicating+Between+Built+LV+App&USEARCHCONTEXT_QUESTION_S=0
But in general you don't need to use this when you use dll's. It is used to
share data between different processes. If you need LabVIEW data in a dll,
try to pass it as a pointer to an array, or as a string pointer.
Regards,
Wiebe.
"lidia" wrote in message
news:506500
[email protected]..
> I'm trying to use shared memory with LabVIEW. Can I use it, a DLL in C
> with LabWIEW for use shared Memory?

Use of FindLstn in Labview

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