Acquire GigE camera data using labview CIN or DLL to call.

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• you want to send data using labVIEW to arduino using write visa and the process and to take action using arduino. A

  I want to send data using labVIEW to arduino using write visa and the process and to take action using arduino. After that, I want to arduino to send out necessary via a serial port to labVIEW which should be read using visa read and store in a chain. While I am able to write or read both individually, I can't do it consecutively. I used advanced read and write vi for checking my code, but nothing is helping. The wrong bed 'time delay before execution. " Please let me know where I can go wrong. Also is it possible to write code for hx711 using labVIEW

  1. you need not "\n" on your orders println().  This command adds an end of line character already in the message.

  2. you get the error because you have a loop around your reading.  After the first reading (well technically, the second because of you add an extra line end character), there is nothing left in the port.  As a result, you will get the timeout.

  3. you should really consider using a Structure of the event.  This way you just don't write and read when you press the Write button and you can also use the structure of the event to make the loop to stop.  I also go up to close the port inside the stop-> value Change event.

  

• How to view mdsplus data using labview

  I posted this question in the Council of Labview, but seems that nobody does it so far. I don't know what is the best place to ask this question. So I reposted here.  Thank you very much.

  I am a newbie to Labview. I'm writing a few vi to display and write data to Mdsplus.  I downloaded Mdsplus(labview) can discover Mdsplus functions, like mdsconnect, mdsput, ect, in vi to call a library function. But I have no ideal how to use it. I tried to use the Mdsconnect function to connect to a machine, but it still gives me an error like: Labview: an exception occurred in the external code that is called by a call library function node...  I was looking for help on the internet documents, but could not find anything useful. Could you please help me with this problem?  If you have examples of these vi, or teach me how it, it would be very useful. I'm using Labview 8 (windows). I would appreciate your help!  Looking forward for your reply.

  Oops,

  I attached properly in the previous post.

  Greg

• Helps the acquisition of photon counter data using LabView 12

  Hey all,.

  Student graduate Chemistry here new to LabView and are looking for some help moving in the right direction.  I'm looking for help with connecting my meter to 12 LabView for data acquisition of trace-fluorescence photon PerkinElmer SPCM-AQR-14 (now owned by Excelitas Technologies).  I just want to be able to acquire number of photon counts vs. time.  Currently, I installed a PCI-6601 and use a BNC-2121 to connect the BNC of the sensor output.  The detector has a pulse output digital TTL with 30 ns pulse width, and by contacting technical support on this issue, I was told that this pulse width was too short to always detected by the 6601, but can still go ahead and give it a try.  Basically, if everyone is familiar with how to start with this configuration, ANY help would be greatly appreciated.  As I said I'm all new to LabView and am currently spend all my spare time reading manuals and help files.

  Please let me know if you need any kind of information to make me understand what I'm doing.

  I would say something like this:

  

  A measurement period the registry account out of the entrance of the samples as well as gives the meter.  You will basically measure the 'period' of your sample clock fixed regarding ticks of the external photon signal.

  According to the downtime, you may need to re-read several samples per loop so that the software can keep up with the incoming data.  Also, the first sample is not useful because it represents the County between the software from the task of entry of the meter and the first clock signal - you should disregard/erase the first sample (or if you want you can set up a trigger to begin arms).

  To do the same thing by using an edge County task would require using both the sample clock AND a counter reset signal - this not is not supported on 6601/6602 (even if it would be possible to set it up that way on a device of STC - 3 as a series of X).

  Best regards

• How to read the Serial Arduino data using labview VISA?

  Hi =). Im a beginner work reading data series from an arduino but im facing... Lets do it step by step

  I built a voltage divider circuit which gives from output
  from 0 to 5V. The output of this circuit is sent to a 0 analog input pin
  of a Committee of Arduino Duemilanove.

  (1) Firstly, I connected the cable to connect to my laptop USB the Arduino.

  (2) I went to start-> control
  Control Panel-> system-> hardware-> Device Manager. Check the Ports (COM
  & LPT). In my laptop I can see USB Serial Port (COM4). Now I know only in
  LabVIEW that I must read the data series COM 4.

  (3) to the side of the arduino, here's the code to read changes in voltage
  entered to analog pin 0. The last line of 'delay' determines the sampling
  Rate of how we want to taste the output of the voltage divider:

  int potPin = 0;    Select the input pin for the output of the voltage divider
  int val = 0;       variable to store the value from the probe

  void setup()
  {
  Serial.begin(9600) (9600);    Opens the serial port, establishes the rate of 9600 bps data
  }

  void loop() {}
  Val = analogRead (potPin); read the value of the voltage divider
  Serial.println (Val);
  Delay (10);
  }

  I slightly modified the basis series reading writing VI... I have
  attached the block schema used with comments. Basically, I tried to read
  data series, divide by 1023 and multiply by 5 to graphic voltage
  variations of the voltage divider circuit.  But Im not getting
  the correct voltage output values. The value of the tension just keeps go
  0 and coming again, as shown in the photo.

  Could you guys please guide me on what went wrong?

  Thank you!

  -you read the data, even if there is no data on the port. If 0 bytes are read => «»

  -in the case of false, you resources VISA wired for the output of channel tunnel?

  -There is no close VISA at the end of the VI resources

  -you're not a loop this VI reading bytes

  I added an addaption of your VI that you should give a try maybe

• How to randomly choose excellent data using labview.

  A very good day to all. I am currently working on a system that will be selecting whole number of together generated at random in number. If this is not possible, I would like to the system to be able to select the number of the set of numbers that have already been generated randomly from excel. kindly help me with the solution. To get clear, assuming I put numbers 1 to 10, I want a labview setup that will recover these numbers one after the other or with replacement without excel or auto generated. I know it's possible in matlab, but would prefer if possible labview.  Thank you

  More, otherwise all of the languages that I ran across were a rand() function returns a random number between 0 and 1.  Get some other range belongs to the programmer.  The usual method is to multiply by the beach, you need and add an offset to adjust the average.  For example, if you need a random number between 200 and 300, the formula can present themselves as "rand () * 100 + 200". "   If you need an integer, you can use the round function (who, it will remain as a float with no decimal pportion) or conversion (all).    All this is feasible and direct in LabVIEW.  Take a look: http://digital.ni.com/public.nsf/allkb/FCCDCD678EEF3A9186256D7B008054F5

  If you feel more comfortable using a file, try this: http://digital.ni.com/public.nsf/allkb/C944B961B59516208625755A005955F2

• How to read the data from a channel named in windows using labview

  Hello

  I need to read the channel named in windows data. The pipe is created by python by another application. This application post permanent data on the pipe. But I don't know how to read data using labview. is it possible to read the data from different application? If possible, how to start?

  Thanks in advance

  concerning

  RJ

  Hi Rolf,.

  It's just, because of driving is not initialized completely, pipe read returns error 42, I added 2 seconds late, then its work perfect.

  Thank you very much.

  Concerning

  RJ

• Report to DENY using LV 2011 built dll crash

  I have an application that uses a built DLLs LabVIEW.  LV dll is called by a dll ActiveX component integrated into VS 2010.  The dll of the LV was origninally built using LV 2010 and worked well.  When we build the same application using LV 2011, everything works up until the closure of the top-level application.  We are then prompted with a dialog box telling us that a failure has been detected (journal text below).  The error occurs if we use static or dynamic linking to the dll.  If I disable DENY it to the application, there is no problem; If as we use a component ActiveX, I must create a for the calling application ini file or disable the DENY for the entire system.  None of these options is desirable, because we cannot know all applications that could use our ActiveX module and cannot control each system we will be deployed on.  If we do not find a work around that, we will have to go back to LV 2010.

  ####
  #Date: Thu, October 27, 2011 13:28:20
  #OSName: Windows 7 Professional
  #OSVers: 6.1
  #OSBuild: 7600
  #AppName: home page
  #Version: 11.0 32-bit
  #AppKind: AppLib
  Base address of #LabVIEW: 0 x 30000000

  27/10/2011 1:32:41.891 PM
  Crash 0 x 0: Crash taken to DENY
  File Unknown (0): Crash: Crash captured by DENYING
  Minidump ID: 6972c89d-ba7b-437a-9d41-d3df28550f98
  ExceptionCode: 0xc0020001y
  N

  I think I've solved my problem, which I will describe in the case where the same thing is happening to others.  The root of the problem, near as I can tell, had something to do with the appeal of the LV dll of in another dll. For some reason, when I linked statically to the dll, the DllUnload process caused this crash report.  I found evidence to suggest that this can occur when you unload a dll from in the process of unloading in another dll on the web; as is the case with static linking.  When I tried dynamic link, I initially tried to use a global instance of the HINSTANCE dll who got charged and discharged with the WinApp object, the result would have been basically the same.  If I connect dynamically to the unload dll event and explicitly the dll before the call dll being unloaded, the problem disappears.  My calling dll is an ActiveX application, I tied to the instance of the dll to the COM object rather than the object WinApp.

  Still don't know why it's a problem for LV 2011 and not 2010 LV.  Perhaps the 'crash' still past and just has not been reported significantly since the app was close anyway.  I'm not sure.  Anyway, hope this helps people out there.

• DAQ Assistant Express Vi to acquire and generate data at the same time in LABView

  Can I run acquire it and generate the Express Assistant DAQ Vi at the same time in a LABView program? I am using LABView 2010.  It's acquire and generate a NI USB-6009.

  Thank you

  Mary

  You can acquire and generate the same VI but obviously you can't generate a wave form unless you do a single point at a time inside a loop with a sample on request and can live with low samples/s specifications.

• Failed to retrieve the DIAdem DataFinder research data, using data-finder toolkit LabVIEW 2009

  I am facing problem to retrieve the DIAdem Datafinder data.

  At first, I developed this project in LabVIEW 2010. But because of a problem that I met in LabVIEW 2010, I thougth to work on the project in LabVIEW 2009.

  Then, I reused the project that I created using LV 2010 using option economy for the previous version.

  When I tried to retrieve the data from the tiara using data finder toolkit. I got a 305505 warning. Please see the attached message of Warninig.

  But I have not seen this warning while I was working in LabVIEW 2010 and also, I was able to get the data from the tiara.

  Please suggest me a way to solve this problem.

  Hi Nanda,
  There is a bug when using the SDK use in combination with DataFinder Toolkit 2009.
  This bug is already fixed in LabVIEW 2010 and use SDK 2010. But as you said there is another question in LabVIEW 2010, forcing you to LV 2009.
  I suggest you use LabVIEW 2009 with use SDK 2009 and DataFinder Toolkit 2009 and instead to use the "Waveform.vi results" to read the search results, I would recommend to use the screw storage. I spread your example VI and it attached to this message. You will still see the dialog box to search for "lvStorage.dll" but it will automatically disappear and the VI works anyway because in this case LabVIEW will find the dll itself.
  My extended VI uses the '_openWithRoot.vi' to open a file with a different use than CT or PDM. This VI is also described in the following knowledge base article: http://zone.ni.com/devzone/cda/epd/p/id/4181
  With LabVIEW 2010 use support has been enhanced and fully integrated in the standard palette of storage screws. So in LabVIEW 2010, you can replace the "_openWithRoot.vi" with the 'Open Data Storage.vi' standard but with LabVIEW 2010, you can also use "Waveforms.vi results" to read the search results.

  I hope this helps.

  Kind regards
  Eva

• How can I display the time of the data stored in a file using labview?

  How can I display the time of the data stored in a file using labview?

  Hi Matt,

  I think that we will need a little more information as to how you capture the data, what data you capture, etc.

  If you capture a waveform, is to extract the time data waveform which includes the t0 and dt values, so you can understand the time stamp of a specific data point as in the image below.

• Strange behavior when using Labview to collect data from Tektronix oscilloscope tds8200

  I hit a wall in trying to understand this one. The problem I have is that my application will not start the oscilloscope when it should.

  I use an oscilloscope Tektronix TDS8200. My goal is to collect data from the oscilloscope using Labview waveform. First of all, my program initializes and configures the oscilloscope; This part of the program works very well.

  The second part of the program begins the acquisition of data with the function 'Tktds8k Start or Stop Aquisitions.vi', which is to press the button run on the scope. The function "tktds8k to Waveform.vi" is used and should ideally return data, which I connected to a waveform playback graph.

  When I run my program, the first part runs without a problem, but as soon as the program comes to the service get the waveform, the run button in the scope, which is green when running, turns off; the program then expires, and no data is collected.

  Here is where it gets weird. I went through the debugging to try to understand this point, and I put breakpoints on the beginning and get shape wave functions so that I could scroll through the last part of the program. The program continues with the departure function, and the button run in scope is green. The breakpoint for the function get the waveform is reached and when I press on continue, turns the Run button and turns it off then back on almost immediately. data are collected, the waveform graph appears and the program ends without error.

  I thought that the timetable could be the problem, so I did the program wait as long as five seconds between the functions of start and get the waveform and that did not work. I also tried to move the start function to before the configuration functions and remove start completely; no method worked.

  is there any ideas on why, the program works when I enabled breakpoints and isn't when breakpoints are disabled? I'm sure there is an easy solution, but I was not able to find a solution.

  I have attached a pdf that contains information about the functions of the Oscilloscope (tktds8k.pdf), and I have also attached my program.

  
  

• How to search a file .csv for data using its timestamp, then import into labview

  Hi, I am currently get density, viscosity and temperature of an instrument, adding a timestamp data and write to a .csv file that I can view in Excel. It works very well (see attached code) but reimport what I have to do now is search this csv file of data that has been obtained at one time, temperature, density & the values of viscosity at the moment in Labview to do some calculations with them, so that the data acquisition process is still ongoing.

  I found several examples on how to import a CSV together in labview, but none on how to extract data at a specific time. Also, every time I try to do anything with the file .csv for my data acquistion VI is running, I get error messages (probably because I'm trying to write and import data from the .csv file at the same time). Is there a way to get around this, perhaps using the case structures?

  If you need to know my skill level, I use LabVIEW for a few weeks and before that have basically no experience of writing code, if any help would be great. Thank you!

  TDMS is a little more complex than that.  Here is a proof of concept quickly lifting together:

  

  You should look at some of the examples of read/write TDMS to get a better handle on the tool.  While I should...

• Need to treat a .dat file using LabVIEW

  Hello

  I need to process a file using LabVIEW 8.6.1, dat I enclose the .dat for your help file. This file must be read and then view a chart using LabVIEW.

  If you can please help me with the format data in I need to change the code to be able to read this file.

  Thank you.

  
  

• Acquire data with LabVIEW Student Edition

  In the meantime, I have to choose NI LabVIEW Student Edition of 2013 and 2013 LabVIEW student Edition Software Suite. The difference is about $ 40 for me. If the old let me remote controls via port series and an acquisition of data using NOR-DAQ-6008, then I can save money. I read a few other threads and the answer seems positive, but I just need a little more confidence before spending the student earned money!

  For serial communication, you need NI-VISA and to use the 6008, you DAQmx. The two drivers are free and available on the Support page. The rest of the student is not necessary at all if that's all that you do.