LabVIEW data Plugin SDK

Similar Questions

• Data not read with custom data Plugin

  Hello

  I am trying to install a plug-in to read our data format custom at the request of the binary data.  Following the instructions of the software plugin SDK, I wrote the code to read the header and data to our format and it works using the test/debugging included screws withn the SDK.

  Unfortunately, when I compile and install the plugin and try to access my data in tiara, while individual channels are created successfully, they contain all the data.

  I've attached a zip file with all of the relevant files, would be grateful if someone could take a look and see if they can find something wrong.

  Thank you

  Shahrukh Alavi

  National Research Council of Canada

  Hi Shahrukh,

  The status bar and the error message often suggest a failure in loading the last parts of the string values.

  We can use create use exit File.vi to debug our code.

  The data file seems to have 7 channels, each has 40282 data points. So I value Offset 40280 and number of Points by the error buffer 2 and got 4 "end of file encountered." in PB_Data.vi. Would it be one of the following reasons?

  1. number of data points (wavelength) is not correct.

  2. the calculation of offset in file is not correct.

  Mavis

  

• measure the angular speed, angle and trigger using a gyroscopic sensor breakout board and LabView data acquisition

  How to measure the angular velocity, the angle and trigger using a gyroscopic sensor breakout board and LabView data acquisition?

  There is a single channel data acquisition code which measures the angular velocity, angle and flexibility using a gyroscopic sensor breakout board and acquisition of LabView data attached to this, I need a help to creat two-channel data acquisition code?

  Hello

  Attached is a vi that you can use in order to read the measured angular position of an encoder.

  If you need more examples on the tasks that you can develop with NOR-DAQmx and LabVIEW, you just need to open LabVIEW and click Help > find examples > Input and Output material > DAQmx > entry counter.

  Kind regards

• LabVIEW data into a text file

  I have a LV program to save the LabVIEW data into a text file. The LV file is attached. My problem is: the first data that are saved after the headers of data, is on the first line of the text rather than the second file. Ideally, it should be line 1, line 2 from data headers. I don't know what is the origin of the data to be concatenated with the headers. Can anyone help on this please.

  Thank you and thank you for your time in advance.

  Hello!

  Your problem seems to be quite simple, if I understand it right.

  All you need is a constant to be concatenated with your header line end.
  The end of the constant line is equal to CRLF.

  So, if you concatenate the header with the CRLF, your concatenated string will be like: "header \n".

  and then, in the following lines (1, 2, 3...) your data will be available as it was already.

  I enclose a snapshot with this change.

  I hope that solves your problem!

  Best regards.

• Edit the plugin SDK sample menu & names

  Hello world

  I am very new to C++ and download the after effects plugin sdk for my short film project.

  I just change the parameters controls, on the tab, but not the menu plugin and the name of the plugin itself. but I am wanted to change the menu plugin and the name of the project that is provided with the sample.

  Please kindly help so that I can complete my assignment of my short film.

  Thank you

  the name of plug-in and the menu are defined in the resource (namePiPL.r) file.

  After you change it, you will have to clean the build and re - build.

  otherwise the new settings will not be applied in him met plugin.

• Dashboard of the LabVIEW data recover indicators of the poll

  Hello

  I have attached my entire project, including the error messages that I receive. I have my labview VI to put in place to have 3 different screws. My entries, my global entries and my "side". I created my web server and all the controls and indicators that I linked. However, when I try and run the dashboard of data project, all my indicators have error signals indicating that he "could not connect to the server. I have no idea what I'm doing wrong. Any ideas?

  The reason why this does not work, it's that your web service code is not quite structured reason. When you call a web method in LabVIEW it does is run the VI related to this method. In your case you have mapped to the URL http://host:8080/FINALCOAST/COAST.vi SIDE, and then you have a poller to web service linked to this URL. When you run your dashboard the poller accesses this URL, which causes the web server of LabVIEW run COAST.vi. If you look at COAST.vi, however, you will notice that what he does is run a loop that runs until the stop button is pressed. Is not supposed for a web method. He has no one to press the stop button. In fact, there is no user interface for anyone to interact with at all. This means that COAST.vi will work forever. Finally, data dashboard gave up and closes the connection because it should not take long for the web server that responds.

  So what is the correct way? It depends on what you're trying to do. In your case, it seems that you take just a bunch of inputs, do some calculcations and producing a bunch of outputs. You could do that in a VI with the method of a web that has just a bunch a bunch of outputs and inputs. In this case, you use just a web service calling (button) connected to one of the methods. Because this method has two inputs and outputs, you will get two entry and exit of Terminal ornaments around the button that you can use to connect to your commands (entered) and indicators (outputs). When you press the button it brings together the current values of the controls and those on the server to use as inputs to call your VI sends, and then he retrieves the results from the server and puts them in your indicators. In my example attached (see the file updated the dashboard) I show you how to do this. Note that I also modified the code of VI to create a Subvi for calculation of Basic code, and it is this VI which is used for the web service. This VI has no loop in him, so he just runs once with data values and returns the results.

  If you want to rather than having a continuous process that is continually measures your system in real time you need another way to access this data from a web service. It seems that that's what you were trying to do here, even if you use data in real time. Suppose that you were, however. In this case, you were a little close, but we need to make some changes. First of all, the running process doesn't have to be part of your web service. It may be, but it's a little more complicated. Instead of this, your process running (COAST.vi) can be just a regular VI running in LabVIEW. You just open and press run as usual. However, you want to only change VI to share its data with other processes. You have tried to do by using globals. Globals allow you to share data between the screws running in the same process, but web services actually run in a process completely separate (in the web server), so you'll need something else. A drop-in substitute would be shared network Variables. You'll see that in annex changed code I replaced your globals with shared variables. Then in your web service if you just use the same shared variables. Network shared Variables allow you to share data between processes (even on machines on the network) so that you can easily access the same data to both your VI running and your web service screw I modified your COAST.vi for this (and he calls the same Subvi from the calculation of the kernel).

  In this case, you could do just a single method "inputs" and only one "exits" method, but it might be better to break up to the less distinct modes which include the strongly bound values just to make things a little neater. It can be tedious to deal with a large number of terminals.

  Alternatively, once you use shared variables you has actually connect your controls and indicators on the dashboard of data directly to these shared variables. This has the disadvantage of requiring more ports to be open through your firewall (and you can not use security as you can do with web services), but for the use of internal network, it is easier to implement. To do this, just run your VI as before, and then as soon as it runs you can select each control or indicator in the dashboard of data, press the small button below, choose 'Shared Variables' and look for your variables on your machine. In this case, each control is directly bound to the variable, and so there is no need of a button. Changes that you make in the dashboard data are immediately placed on the server through the variable sared, and your VI (which is still running until you press stop) will see the new value, update the outputs and then repel these new values to the dashboard of data via other shared variables.

  I did not create a dashboard for the last two approaches, but if you may not know what I'm talking about, then I can create examples for those as well. The screw and the project must be configured to work in any case, if the only difference is in the configuration of the dashboard.

• Sharing between several executable LabVIEW data queue

  I have 2 Executables (Exe) of LabVIEW where an Exe generates data and other we consume the same. Is there anyway that I can use a single queue for the same reference? Exe first gets the number of queue and stores the reference number in V.I.G where the second Exe to read this this V.I.G. reference number The error of the VI second dequeue mentioned the invalid queue.

  Is there anyway that I can share the same data between different exe files with the functionality of a queue?

  Each exe is mapped in its own memory space so in a context resource refs will not work in another, but...

  If you presentation engine of the Action in an instance must be used via the server VI Invoke node on the other, EI (Note: it will run in the context of the server) could queue data in the customer's name.

  Plese Note:

  If the alternate server is idle all of its resources will be invalidated (including the queue) but a ref to the EI will be valid. In this case, the enqueue op will fail if you have the code to take account of this situation. (been there, done that )

  The same approach works in any network where serve architecture VI can be used. I've used this approach about 10 years (less the queue) to allow the control of a plant of a laptop computer with an internet connection.

  Ben

• irig106 data Plugin to read the file extension .ch10

  Hi forum,

  I'm reading the IRIG106 (.) Ch10) using use IRIG106 use http://www.ni.com/example/31585/en/

  Can someone help me how to read a file using this use in LabVIEW or tiara.

  I tried to use this use to read IRIG106 (file .ch10 Extn) in LabVIEW but LV is getting crashed without reason!

  Thanks in advance.

  Hi all

  Changes to the use of IRIG_106 to read these new data files have been posted on the www.ni.com/dataplugins site today.

  http://www.NI.com/example/31585/en/

  Brad Turpin

  Tiara Product Support Engineer

  National Instruments

• problem of data plugin tdms_se on the signal on purpose 2013

  Hi all

  Recently, I have instaled the 2013 express signal on my pc. I made an acquisition, and when I try to open the tiara, decimated appers groups on it. It seems the plugin data "tdms_se" does not work.

  The acquisition is set on this post.

  Can someone help me?

  Hello dhkawasaka,

  Please download the new version of the TDMS_SE use of our Web page http://www.ni.com/example/31289/en/.

  Best regards

  Heidi

• LabVIEW data - memory usage

  Hello

  Could you help me, how to 'measure' or ' to ' a requirement of memory data labview? For example, I have an object, and many objects of LV are private members. How do I know what is the requirement of memory (k) of the specified object? But my question to all the data of labview. Big clusters, clusters and so on...

  I know there is an option in the properties of VI: use of memory... but I fear it does not say what is the current size of the run-time data...

  Any idea?

  Thanks in advance!

  Tools-> profile-> Performance and memory

• Adding a date and time to create a channel in a data plugin

  I would like to preface this question with the fact that I am new to VBS programming.  What I want to do is to create a plugin. Most of it is done, but I'm having a problem with the addition of two times to a.  I have a text file that stores the date and time separated by a tab character.  This file format was designed to excel.  When I bring him both the date and time are in different channels and I can not figure out a way to add both and either replace them or even place it in a separate variable.  Here is an example.

  Chan (1) contains the date, Chan (2) contains both.  This statement, which places the data in the string is:

  The StandChannels value (0). Values (k) = Chan (1). Values (i)

  I tried:

  The StandChannels value (0). Values (k) = Chan (1). Values (i) + Chan (2). Values (i)

  error: object doesn't support this property or method

  or

  Chan (1). Values (i) = Chan (1). Values (i) + Chan (2). Values (i)

  error: object doesn't support this property or method

  I tried several other iterations and have had no success.  This seems to be an easy task, Miss me probably something simple.

  Hi Eric,.

  The first problem is that your datetime format string was wrong, you need to use:

  File.Formatter.TimeFormat = "MM/DD/YY SS.fff.

  Or maybe if your year is first of all it must be:

  File.Formatter.TimeFormat = "YY/MM/DD SS.fff.

  The second question was slippery.  The newsgroups (0) you throw combines the ProcessedChannel values correctly, but you were not successfully picking off those that you wanted to leave Chan (0).  I don't really know why the method you were using did not work, but I found a similar one that does.  Note that I've only changes part SUB New_File (file, ChanNames) of the code, not the SUB Previous_File (file, ChanNames) part of the code (got tired of typing).

  Brad Turpin

  Tiara Product Support Engineer

  National Instruments

• LabVIEW data acquisition Setup Multifunction DAQ

  I have doubts as to the acquisition of data in the LabView environment. I used the block diagram (Figure 1) below to review the update of the readings for the execution of a loop.

  Block 1 has been used to enable a task (first steps) with 3 channels (al) analog input AI3 and even set up the channel. In this case, the data bus (data-block 4) are construindos by 4 columns of data (provided by task 3 AI3 more).

  Block 2 is used to set the sampling rate in this case is 1 Hz (1 sample per channel x 1 rate).

  In this case, it worked as I expected (Figure 2). This allows to conclude that the interval between each sample was 1 second. The saw took a second in the iteration.

  The second step was to change the amount of data sampled in accordance with Figure 3 channels in block 3.

  Now, each channel showed 10 samples, while there are 4 channels configured, we have 40 samples. In this case the iteration totalled 10seconds (point to 1 Hz and 10 samples per channel-figure 4).

  The first question is what is the time between each sample obtained by channel?

  In this type of configuration (multiple channels), block 3 provides 10 samples in each channel, as well as the sampling is done, IE, the block gets 3 10 samples from a channel and passes to the next channel or gets 1 comp each channel and repeat this process up to 10 samples per channel?

  What is the best way to make sure that the interval between each sample is constant?

  If anyone knows any text that explains what the function blocks of data acquisition information please.

  Thank you

  Gabriel

  Well, there are several ways to read the signals of multiple signals, and each of them has different behavior. I couldn't see how you get mutiple channels, because in the two codes, you set a channel in your codes. Take a look at this figure:

  

  Here you can see how to set multiple channels using DAQmx, using commas to separate the channels. About the ways different ways that you can read the signals, you can look at the links I sent in my first post to learn more about them.

  In a few words, the time between samples from the same channel is T = 1/Fs, corresponding to the sampling frequency Fs. It is not a rule to determine the interval between samples from different channels, because it will depend on how you did your code, and as I sad, there are different ways to do. You can acquire the samples at the same time, or you can configure your code to read a fixed number of points of a channel and then read another fixed number of samples to another channel (https://decibel.ni.com/content/docs/DOC-28279). You can acquire a finite number of points, or you can acquire all the time. Yet once, take a look at the material that I have already sent. It will help you find the best solution to achieve your code according to your application.

  Kind regards

  Pedro

• Where are the guidelines on how to interface custom for LabVIEW data acquisition equipment?

  I have a need to do some very specialized data acquisition that may require special hardware for the building. I would still use LabVIEW as the front end and maybe even wear parts of the interface of the final product. However, I can't find the documentation. Where is that is kept? I've seen references to a number of generic protocols, no links back to the details, which may be appropriate. The data are a band high bandwidth, but bursty with sampling frequency up to 40 MHz and events that lasts about 100 milliseconds. Can anyone recommend various methods would be most suitable for this application?

  You can use the instrument driver model and guidelines.

  http://www.NI.com/white-paper/3271/en/

  Use google to search not for OR

  I searched

  national instruments instrument driver guidelines

• Is it possible to stop labview data hex autoconverting to a SQL database in ascii?

  Hi all

  I is currently working on a program that ask a SQL database for the data from the sensors and converts these data into a spreadsheet for future use.

  My problem is the following:
  I can access and read the data very well; However, the data I'm after are stored in the database as a hexadecimal number (example: "0 X 5727000...) ». When I pass this through this vi "DB Tools Fetch Item Data", he captures the data and the autoconverts it in ascii. It is a huge problem because the data contains several pieces of information and must be analyzed before his conversion in order to achieve the correct value (and wrong format in ascii).

  Is it possible to recover the data as a string containing only the hexagonal information? I already have the code that converts it to; I need as hexadecimal values and not ascii he tries to AutoFormat to.

  Your data are permanently binary.  And how it is stored in the database is a function of some program put in there.  It is not a case of LabVIEW doing any "autoconverting".

  "more labview uses the display format Hex to work more on television anyway.

  So the next question is what is the continuation of the work you want on these data?  There is a function call "String to Byte Array" that converts the characters in a table of U8.  So now, you have a table of numbers of U8.  What you then do with that depends on what all these data are supposed to represent.

• microphone in labview data acquisition

  Hello

  My name is Michael. I want to get micro data in labview using connection jack 3.5 mm on my laptop. I looked in daqmax and did not see the microphone. Is it possible to enter these data in labview? Any help will be great.

  Thank you

  Michael

  Did you do a search on the forum? I've seen dozens of messages asking the same thing.

  Mike...