Communication problem between LabView and acquisition of data USB 6259

Similar Questions

• Bad drift with USB-6259 devices and acquisition of data PCI-6259

  We have both a USB-6259 and PCI-6259 installed on a single computer, linked to a SBC-68, with Matlab and Toolbox of data Acquisiution.

  For the purposes of test base, I wrote a script that generates a sinusoidal signal output based MATLAB, for a single DAC output.  I wired this single DAC output to two channels of ADC of entry.  For each sample output DAC, the script also takes a sample entry of ADC on each channel.

  --> Ideally, if everything works correctly, after you run the script, I see two channels of input ADC vector.  Tracing of each channel should give me a nice sine wave in Matlab.

  --> When I made trace data, here's what I get (see attachment).

  -->, I looked at the DAC output with an oscilloscope, and the DC offset is very close to 0 (this indicates to me that the part of output DAC works very well).

  Why is there this negative DC drift on two entries?

  Forgive my lack of knowledge - I know the difference between the DIFF and CSR connections, but I don't know where is the 'setting' for DIFF/CSR (what is a button/switch on the USB-6259 case?  Is it a software control in the code?)

• Problem between Labview and Melanie 2602

  Hello world

  I think my question is a bit silly, but I really don't know what the problem is. I just want to read my current solar cell by changing the level of my blood to get an IV curve, which is normally pretty easy. So, I created a loop, where I increase my voltage step by step, and used a function named VI from Labview library that connects the Keithley and Labview together, "Keithley 2600 Series.lvlib: Source Level.vi. I start at 0 and increase by 0.01 volt each time. If I use execution of climax, I see clearly the value is correct, and if I go inside the SourceLevel VI, I clearly see the command string: "smub.source.levelv = 1.6," for example, if I want to put my voltage at 1.6V. The attached picture shows a part of my code.

  Despite all this, it is clear that the Keithley does not react properly. It only works v of v 1V, 2V, 3V, etc... but never the values between. My IV curves are ok to read the Isc, but no VOCS. Never happened to any of you? I would be really happy to understand what I'm doing wrong, because it seems easy enough to solve. :/

  Thank you very much!

  It is quite difficult to debug a picture of a tiny part of the code.

  But I'll take what I see.  Your constant shows a 0.01 (comma).  So I guess that you are in a country that uses a comma instead of a decimal point.  I don't see what is happening inside the code Keithly, but I'll make an assumption that he made some conversions where it is expected that the comma is a period.

  Look closely at the code Keithly and see if that explains it.  Try to set your PC to use a period for the decimal point and try to re-run your code and see if it works better.  It is possible that Keithly conversion uses a system, rather than setting using a decimal point, which is that your sentence says it's sending.

• Communication between Labview and Acton spectrometer via USB or RS232

  I'm trying to communicate between a PC running XP and a spectrometer to Acton 2300i using Labview.  Windows recongizes the specification and assigns it to COM3 with the correct name.  Also, the software provided with the specification can communicate with him.  However, I was unable to communicate using VISA in Labview.  I downloaded the simple read and write example vi fromt the example finder and changed the entries at 9600 baud... but I am still unable to connect.  I also tried connecting via software of measurement and automation NOR, but getting the timeout error code.  I was able to connect using GPIB of Labview for another more old Acton Spec 500i but the onle new version connects via RS232 or USB.

  The problem was simply not having a return of carrage added at the end of my order.  Thank you for your help.

• Interface between LabVIEW and c#

  Hello

  IAM trying to send data to Labview via ithernet in a product that already have in c# .net. This means that data send LabVIEW must be posted in c#. Thus the Labview will act as the server and the product in c# will be serving the customer. I have serached in the forums to make the connection between Labview and c#. I saw a tutorial to make dlls in labview, in what they explained to hold tools > Build Application or shared Library.But I can't find in my tools although I version2009 of professional development.

  Can someone give me some instructions to send Labview data and display it in c#. IAM attaching the VI Server I made. The client in c# is a great product that has already done by others in c#. I have very less experience of programming in c#. Can someone give me some instructions or attach a few tutorials to make the connection between Labview and c#.

  
  

• Problem between C40 and Panasonic AW-HE50HE camera

  Hi all

  We have identified a problem between C40 and Panasonic AW-HE50HE camera with HDMI connection.

  The Panasonic camera is configured with the 720 p output, and it can display on a LCD monitor.

  However, we have connected the camera C40 and Panasonic AW-HE50HE with HDMI connection, the C40 show black screen.

  The codec C40 is confirmed as well function and its specification declared support,

  1280 x [email protected]/ * /, 59,94 Hz (720 p 60)

  1280 x [email protected]/ * / Hz (720p50)

  Anyone can provide help for me, thank you,

  Ben Lai

  Hello

  Can you telnet to the codec with the camera connected and check if the codec no video camera and what is the detected resolution.

  Teck Chye

• Need a new acquisition of data USB multifunction device

  Hello

  Currently I use a PCIe - 6321 Multifunction DAQ hardware to control my stepper motor. I need to change the PCIe - 6321 and use the engine with a device for the acquisition of data USB multifunction bit PCIe - 6321. I'm not sure which USB model to select. Can I please get help about the choice of the right MIO USB data acquisition device that works similar to the PCIe - 6321.

  Thank you

  Bharath J S

  The 6212 differs from the 6321 somewhat on the digital side, which probably you use to control your stepper motor.  For example, it was only software DIO timed tasks and has only 2 counters with a set of features (e.g. no output meter in the buffer).

  Best regards

• Looking for a way to mount an acquisition of data USB-6008

  Anyone has a suggestion for an acquisition of data USB-6008 mounted on a Panel. I use it for a system where it should not be loose. I have a few ideas, but hope that someone smarter already has a good solution.

  Thank you

  It is not a robust application, but the box will be moved and I don't want it put in the open air. I simply put a velcro pad on the back and the atttaching in this way. Should be all I need.

• Communication between LabVIEW and MCU based on Modbus Protocol

  Hello

  I am a first year student in the port.and series applications see you, my projiect needs to communicate between LV and MCU based on Modbus Protocol.all configure it are correct, but the lv to send false information which is not suitable for modbus.i do not know how to fix it.

  My programs are:

  Why did you decide to write your own code instead of what is already available? If you had done a search, you would have easily found the modbus library. Just give a try.

• Difficulty to read the instrument of series and acquisition of data simultaneously.

  Greetings,

  I have some trouble getting my VI read from my data acquisition and instrument of the series at the same time.  If I run the Subvi simultaneously (i.e. subANG runs in a window and subVEL is running in a second window) both return the correct values and behave as I expect.  However, if I call the Subvi in a society mother VI and try to run them both in the same loop structure subANG gets stuck and won't be reprobed with a signal change.

  I also tried to use a stacked sequence or plate to separate the execution of subVEL and subANG, but I still get no response to subANG.

  The point is is that, if I run Parent.VI in a single window and then creates a copy of subANG (call it '--copy' or other) and run it in a second window, Parent.VI behaves properly and will update the readings as they appear in '--copy '.

  I enclose 3 files.

  (1) subANG.VI - this bed an an inclinometer RS232 signal.  The signal is refreshed every 10ms or more.

  (2) subVEL.VI - this bed raw tension of a channel on the acquisition of data, calculates the average then that converts into a pressure difference and finally a speed based on the pressure and temperature inputs.

  (3) ParentVI.VI - they simply call and displays the Subvi

  My guess is that it's a buffer problem, but I am confused.  Someone out there in Labview Earth knows why this might be happening?  Suggestions welcom.

  It is not an instrument of series.  It is a UEI PowerDAq with their typical A/D and the cable.

  I found away to make it work by placing subANG and subVEL in some time different loops side by side in ParentVI.

• Table does not work correctly between LabView and TestStand

  I'm doing a TestStand program that reads data from a LabView VI.

  If I run the VI in LabView, it works perfectly well and generates a table with 18 points in length, the first 3 are numbers between 0 and 10 and the rest being-1 as I intended. Re-run the VI causes the re - initialize correctly and I get a new table that also meets my specifications.

  When I run the VI of TestStand, it works fine once, producing a table with 18 points, the first 3 are numbers between 0 and 10, and the rest is-1.

  If I run the VI in TestStand once again it increases the length of array in 18 each time. In so doing, it fails to write the new 3 numbers and just add - 1 in table 18 times. If I restart TestStand will work fine once more, he repeats the error if I re - run the VI. I don't understand why this is happening.

  I have re-product the error in a separate VI and the order, and I have attached an example in this post. The VI contains all the necessary information (if not, please say so and I will correct it), and TestStand sequence is configured to put all results, I would find useful in the report (as additional results).

  Your problem is your VI.   Specifically the comment nodes.  They initialize on the first call.  TestStand retains the VI in memory.  So when the VI is called again, the comments always nodes have their last value.  You will get the same results if you have VI your ArrayBuild.vi twice appealed.

  The way you use the feedback nodes, they really replace with Shift Registers.  I like your comment nodes, but since you pass the value of the node in the loop, the SHIFT registers are much more appropriate.  Just make sure you initialize your Shift Registers.

• Passing variables between LabVIEW and TestStand

  Hello

  I'm just learning how to use TestStand and although there are a multitude of resources available, I always find me at a loss on how to pass variables between TS and LV, leaving me to think that there is one fundamental thing that I'm missing which is likely, given that I have a weeks experience with LabVIEW and a days of experience with TestStand.

  I took a glance to the example of 'Clusters' to the Code Modules in TestStand examples (I use TS 2016 if it matters) because I thought it would be quite ideal for what I hope. In this case, I hope to be able to pass a string (a file path) to LabVIEW and VI power take this string and use it as part of an order for the Exec.VI system.  Then, I would be able to pass strings back to TestStand to show the user if an error occurred, but I thought I should get the first part of work.

  I guess my question is what do I have to wait to see in clusters to the example of the Modules of Code? The Watch window displays all defined variables premise on which has the ContainerOut in the Variables pane, but I don't see any kind of update on facades (VI1.vi and VI2.vi) LabVIEW code. Should I be?

  I looked at a few other discussions of the forum here and here, as well as the document of the basis of knowledge here, but could not recreate their solutions. It seems that the connector pane would be a viable way to go, but I'm not sure on how we create and use effectively. According to this document , it makes it seem like it should be simple enough to makes these terminals, but I am still missing a key step. I was able to follow all the steps on the knowledge base document and run the sequence, but then had no idea if it worked or not; I have the report show me the values of the variables I put, but I have no idea whether or not he actually did anything with the LabVIEW VI, or how I could see that.

  Please let me know if you need further information or clarifaction everything I ask.

  Thank you for your time,
  JColvin

  Digilent, a company of National Instruments

  If you want to enter values, you must create a vi for instance dialog box

  

  

  The OK button will allow new values to pass to the output terminals.

  A Cancel button will pass just the original through the output values without alteration. The VI will close when either the OK button or cancel were pressed.

  Concerning

  Ray

• Creating installation and acquisition of data-MX: Error Code

  Hello

  I found this question been asked several times in 2009 and 2007, but the answesr on the forum doesn't really help me - partially because they say: oh he just worked.

  I'm trying to craete my first Installer for a LabView project.

  It is simply an assistant DAQ for a card OR. I'm moving my a comptuer with LabView application than with the card = without labview and I prefer not to install labview on both.

  When I include DAQ - MX and the Run Time module I get this error code for the installer.

  Visit ni.com/ask support request page to learn more about the resolution of this problem. Use the following as a reference:

  CDK_Build_Invoke.VI.ProxyCaller > CDK_Build_Invoke.vi > CDK_Engine_Main.vi > IB_MSI.lvclass:Build.vi > IB_MSI.lvclass:Engine_AddProductsToDistribution.vi > NI_MDF.lvlib:MDFDistBuildList_Close.vi

  Loading information of product deployment
  Loading information of product deployment

  **************
  Error: Bad line of command or argument of function call. (Error code - 30)
  Type 'DefaultFull' product ' KB5Q5FJ4QW NOR security for the LabVIEW Run - Time Engine 8.2 update ' is not found in the source distribution. " Insert the correct source distribution, or select a different type of product.
  **************
  Error details:
  Error to the MDF API function: _MDFDistBuildList_Close
  Error in MDF:istributionBuildList::AddDependentProducts.
  Final report of the error
  **************

  Don't know what this means

  For this one

  Type 'DefaultFull' product ' KB5Q5FJ4QW NOR security for the LabVIEW Run - Time Engine 8.2 update ' is not found in the source distribution. " Insert the correct source distribution, or select a different type of product.

  I think it means that's not find the CD of where to get this Setup Wizard? Isn't it? Well it's never me invites to a medium where to find this file... so I'm stumped.

  We'd appreciate any help, I will answer the weekend too!

  Thank you!

  Also, I have

  Thank you.

  I have attached the single file in my project I am trying to install...

  Laughing out loud.

  
  

• Generation and acquisition at the same time, acquisition of data USB-6356

  Hello

  I have a VI how is able to read entries with a USB DAQ-6356 and I use a generator of signals 'Agilent 33522 A '. I want to generate and acquire with the acquisition of data.

  In fact it works but not well, the frequency is not very stable and does not stop the 2nd loop with 1 (2nd is generating, 1 is Acquire).

  Thanks in advance

  P.S my VI isn't a state machine true because I need to fight against it at the moment.

  OK, so you're at 3 ms/s in writing and reading at 1.25Ms / sec and you wonder why he has a little difference in the frequency set?  Ideally, you want to read and write to share a sample clock but by selecting at least the same frequency clock (or one that is one multiple of the other) would go a long way to fixing this source of your error.

  The second source of error: you generate a contineous waveform.  unless you select 'whole number of cycles' there is a discontinuity when the end is reached at an arbitrary phase and the phase is reset to zero at the beginning of the wave.  DAQ assistant writing can "Use Waveform Timing" to adapt its sync settings to the dt waveform and the number of samples.

• How to pass variables between Labview and Teststand

  It is probably a trivial question, but I'm new to TestStand. All I'm doing is updated to a variable in Labview and then pass this value in a local variable Teststand. A simple test that VI is attached. I get no error and it seems correct, but when I followed the variable via TS watch display is not updated. Also I am not able to read the variable outside TS. It is probably a trivial thing, I'm doing wrong, but I'm stuck.

  Too bad, it was simple. Just need to add the context of sequence as input, then set it to ThisContext TS