Daq assistant

Hi,
I recently installed Labview version 8.5. I installed the data acquisition cds aswell, but there is no daq assistant icon, instead there is a blank space where it should be. I would like to know how to access and to create the icon on the functions panel.
Regards,
Mark

Hi,
The Data
Acquisition palette relies upon two installations: the LabVIEW
installation and the DAQ driver installation. When the NI-DAQ drivers
are installed, the installer will automatically detect the versions of
LabVIEW present on the computer. Most often, the DAQ support for these
versions of LabVIEW are then installed. Unfortunately, this means that
if you upgrade to a newer version of LabVIEW you will need to add DAQ
support for your newer version of LabVIEW by modifying/reinstalling
your DAQ drivers.
Steps to ensure driver VIs appear in LabVIEW:
Ensure
that all development environments being used (LabVIEW, CVI, etc.) have
been installed before the device driver. Installing LabVIEW after a
driver will not update the functions palette with those driver VIs. In
this case, it is only necessary to modify the installation for those
drivers that do not appear on the functions palette to include support
for LabVIEW.
Install the most current supported version of your device driver which is compatible with your version of LabVIEW, and be sure to include support for your specific LabVIEW version when prompted.
Close and reopen LabVIEW. You should now see the appropriate icons for all installed drivers on the functions palette.
There
are several other reasons why certain functions may not appear on the
palette. If the above steps do not resolve the problem, see the related
links below or contact National Instruments support.
Steps to add driver VIs if LabVIEW is installed after the NI-DAQ drivers:
Open the Add or Remove Programs dialog from the Windows Control Panel.
Select the National Instruments Software entry and click Change/Remove.
Choose NI-DAQmx and click Modify to add support for your version of LabVIEW.
Verify that the proper menu files have in fact been installed correctly:
If the respective DAQ and DAQmx VIs have been installed correctly, their menu files should be present: C:\Program Files\National Instruments\LabVIEW X.X\vi.lib.
The associated menu files should be installed in the following location: C:\Program Files\National Instruments\LabVIEW X.X\menus\default. These menu files are ultimately what links the installed VIs to the functions palette in LabVIEW.
If this doesn't work then please let me know your DAQmx driver version installed on your system (from Measurement & Automation > Software > NI-DAQmx)
All the best,
Applications Engineer

Similar Messages

New project using Daq Assistant or not ?

Hi everybody,
I need to create a software to do some realtime acquisition & analysis.
I trained myself a little bit on c# lessons to get use to this programming language; I’m also discovering Measurement Studio & Visual Studio. (I’ve background in C++).
My software will have 2 modes :
Continuous acquisition, signal plotting + signal processing & plotting (fft, 1/3 octave band filter)
Triggered acquisition, signal plotting + signal processing & plotting (fft, , 1/3 octave band filter)
I have examples in my National Instruments directory which don't use daq Assistant and code is different from generated files with daq Component.
If I use Daq Assistant ( http://www.ni.com/tutorial/4652/en/ )
I know that the code to create channel is stored in DaqTask.cs
Plotting :
NationalInstruments.AnalogWaveform<double>[] acquiredData = daqTaskComponent1.Read();
waveformGraph1.PlotWaveforms(acquiredData);
When I look to examples, like "MStudioVS2010\DotNET\Examples\DAQmxWithUI\SpectrumAnalyzer\cs "
all code to create channel is generated in Mainform.cs, there is no Daq Assistant (http://www.ni.com/tutorial/5409/en/ )
and there is a slight difference between acquired type :
private AnalogWaveform<double> data = new AnalogWaveform<double>(1000);
data = reader.EndReadWaveform(ar);
acquiredDataWaveformGraph.PlotWaveform(data);
Questions :
What is the difference between AnalogWaveform<double> and AnalogWaveform<double>[] ? why it's not the same type ? I need to do some signal processing with this signal, so what type should I use for my application ?
I didn't succeed to configure my 2 modes in daq Assistant (continuous and triggered acquisition) is it possible or should I create 2 Items in my solution, one for continuous acquisition and on for triggered acquisition ?
Kind regards,

Check out the downloads section of iLounge.com. There are a handful or two of applications that will help you transfer songs from the iPod to the computer.
Another option is to network the two computers together and transfer the iTunes folder to the new Mac. All you need is an ethernet cable and to turn on file sharing in the Sharing preference panel. Depending on how old your "older" Mac is, you might need a crossover ethernet cable.
A third option is to hook up the two computers using a Firewire cable. On the older Mac make sure it is shut down, hook the two computers up, turn on the older Mac while holding down the "T" key. On the new Mac you should see the old Mac's hard drive show up. Just find the iTunes music folder and copy it over. You could also use the Migration Assistant which will be in the Utilities folder of the new Mac.
Hope this helps.

I have a DAQ Assistant configured to read multiple channels at the same time. When I wire a graph indicator to the output, I see all of my signals jumbled together. How do I split them up into seperate signals?

I have a DAQ Assistant configured to read 2 channels at the same
time. When I wire a graph indicator to the output, I see the 2
signals jumbled together. How do I split them up into seperate signals?
When I wire any type of indicator it is showing just one output of a single channel.
I want 2 indicators showing 2 different signals as expected from the 2 channels configured. How to do this?
I have tried using split signal but it end up showing only 1 output from 1 signal in both the indicators.
thanks in advance.
Solved!
Go to Solution.

Yes you are right. I tried that but I did not get the result.
I just found the way. When we launch split signal, we should expand it (split signal icon) from above and not from below. It took me a while to figure out this.
thanks

How to use DAQ Assistant to display two analog channels in a XY Graph

Hi,
I am new to LabVIEW. I have been assigned a project in which i have to display two analog signals from an analog potentiostat i.e. voltage and current (also a voltage signal) on a graph using labview. I am using a myDAQ device to acquire these analog signals and I am using labview 2013 to display these signals on a graph. I am using DAQ assistant to configure these signals. Rightnow I have separate graphs for each channel. However, I want a single XY graph to display one voltage as a function of the other i.e. I want to have voltage on the X-axis and current output on the Y axis. Any kind of help is greatly appreciated.
I have attached a screenshot of the VI. that I have made.
Regards,
Max
Attachments:
New Microsoft Word Document (2).docx ‏32 KB

Thanks for the quick response. I was able to make a X-Y graph. However, I can only see a dot floating around. It's not drawing anything. I want to see it making a plot as it collects data. Also, I want to see the complete waveform formed when I stop the VI.
Thanks,
Max

How do I use DAQ Assistant to output DC on an AO?

My background includes 15 years of programming PLC's. AO's were simple. You passed the AO a value between preset ranges and it output a proportional voltage signal based on the hardware capabilities.
I foolishly thought LabView and DAQ AO's would be about the same. I built a vi to generate a DC signal which I could control the amplitude of. I also tied it to a chart to monitor how it worked. I managed to draw some very pretty ramping pictures on my chart, but when I put a DMM across the physical terminals I see no voltage.
Then I used MAX to test the channel and measured it again. Now I see voltage on my DMM. I was attempting to use the DAQ Assistant to do this. Do I need to force it to re-read the changing value I am sending it? All of the examples I find show me more primitive methods, and I could not seem to get any of them to do what I want either. I need to send a speed reference to a DC drive.
My incorrect method was to recursively add a value for ramping the signal up or subtract to ramp down. This method works perfectly on an industrial PLC. I connected a chart to the signal just as it entered the DAQ Assistant, but the only way I could check the actual was with the DMM.
Are there any examples that use the Assistant? If not then I guess I will have figure out how to use the primitives anyway.
technomage

Hello technomage,
It looks like we have discussed this problem in another thread (found here). If you have any other questions about it, please post there.
Regards,
Jesse O.
Applications Engineering
National Instruments
Jesse O. | National Instruments R&D

How to select signals from the output of a DAQ assistant

Hi!
I am a new user of Labview 8.5 and I am working with a USB-6210. I have two different instruments connected to the same USB device, half of the channels are being used for pressure transducers where I only need to reed and save the data, while the other half are associated to TCD detectors where I need to perform some analysis to the signal to obtain and save the data. I am in the first step of building the block diagram, After I define each of the signals which its corresponding channel using the DAQ assistant, I need to select and separate the signals coming from the pressure transducers from those coming from the TCD detectors, before I can continue drawing the block diagram. I am trying to use the Select Signal function but I am not sure how to do this. Can anyone please let me know at least in which manual can I find a good explanation? I have been reading the Getting Started and the User Manual for LabView but they have not been very useful so far.
Thanks!
Solved!
Go to Solution.

Wire the Select Signals express VI to your DAQ Assistant and run the VI once (this allows the signal names to propegate). Then when you open the Select Signals configuration you'll be able to pick out the channels you want by name instead of just "Signal 1" etc.
It sounds like you'll probably want two Select Signal Express VIs, one for the TCD detectors and one for the pressure transducers. Something like this:
If you right click on the VI and select Help or click on the Help button within the configuration dialog you will bring up the LabVIEW help page for this (or any other) VI. Are you looking for some other information that isn't documented in the help file?
Hope this helps,
Simon

DAQmx driver for DAQ 6009? Need DAQ Assistant in Block Panel palette.

Do I understand things right? The Ni USB DAQ 6009 is supported in DAQmx base and not DAQmx, or is this only true for the 6008? I need the DAQ Assistant in my LV 2009 Block Panel palette. Do I go to my Ni-DAQmx 8.8 CDs, or do I download something. Maybe I have the DAQmx base already? I'm going to search my palette and NI Max. I am also going to look at http://www.ni.com/support/daq/version_portable.htm#du. If I'm going about this all wrong, please help.
Thanks
Norm

Hi Dennis
My DAQmx Cds are 8.8. I don't have a selection for the DAQ Assistant on my block panel palette, so I'm looking to get an update for my DAQmx driver for my USB 6009 DAQ that I'll be using with my student software for LabVIEW 2009 version 9.0. I've looked at a NI document "NI-DAQmx and NI-DAQ Driver Support: Portable Devices" that was published on Jan 17, 2013. It says for Windows 7 I should be using 9.6mx, but this document make no reference to a version of LabVIEW. The date of the document is 1/17/13; maybe it is refering to only to version LabVIEW 2013. Can you help?
From what I've read I believe I need to use DAQmx and not DAQmx base, but I can't help wondering if the DAQmx base has something to do with the "NI DAQmx Device Basics" that I see on the right side of the screen when I'm in NI MAX getting ready to run the test panels. ?????
Thank you for your time
N.D.

I'm trying to set up a DAQ assist just to measure some voltage, how do i get the graph to start from 0 (time) every time I press run

Hi all,
I am trying to set up a simple DAQ assist to measure some voltages (currently a 9 volt battery to aid set up), when choosing to use a waveform chart to log the voltages the graph doesnt start from 0 (time seconds) how do I do this and get it to reset every time I press run or even stop.
What I want to see at the end is a chart for the full lenght of the test showing voltage against time in seconds.
Any ideas peeps
many thanks
Shane

Hi Shane,
Look at this VI
Here, I clear the chart before running the VI, using a 'history data' property node ( i pass an empty array to clear it)
In effect, each time you run the VI, the chart will begin at 0:00
Hope this helps
Regards
Dev
Attachments:
chart_start.vi ‏20 KB

Error message from labview when trying to set up the DAQ assistant

I recieve a message from labview when I try to set up the DAQ assistant and select a channel to use. The error I get states "An exception occured within the external code called by a Call Library Node. This might have corrupted LabView's memory. Save any work to a new location and restart labview". Labview then freezes. I have reset the DAQ device in trying to slove this but I still get the same message. How do I solve this?? thanks - mars2006

Hi Mars-
It sounds like your NI-DAQ installation may have become corrupted. I would suggest uninstalling and reinstalling the DAQmx 7.4 driver to correct this problem and ensure that you're up to date. This download is available here: NI-DAQ 7.4
If the problem persists you may want to uninstall and reinstall LabVIEW and then NI-DAQ in that order. The error message will usually give an indication as to which VI the error occurred in. Please let us know which VI is failing if you're unable to avoid the error with these suggestions.
Have a good day-
Tom W
National Instruments

How to deal with the Error-89130 about the DAQ assistant?

Once prss the "test" button of the DAQ assistant, the "Error-89130 occurred at DAQ Assistant" show up. It`s no doublt that the labview programme with a DAQ assistant can`t be run and instead the " Error-88303 occurred at DAQMx star Task Vi:1" or " Error-88304..." show up while other labview programme without DAQ assistant can run corrrectly. I have reseted or reinstalled the DAQmx, but it didn`t work. Any other ideas for troubleshooting this? Thanks

Please refer to this KB, and see whether it works. If problem also exists, please tell the DAQmx version and the DAQ card name.
Haifeng Xu
NISH AE

How to properly read data from one DAQ-assistant and write simultaneously with another DAQ-assistant (which is inside a loop)

Hello.
I'm a newbie working on my Master's thesis conserning a project that is based on old G-code made by another newbie so bear with me.
I need to create a sequance of output controls. For this I'm using a for loop that eventually creates two triangular ramps during a period of 90 seconds. I've confirmed that this function works properly by measuring the actual output of the DAQ-decice (NI USB 6353).
The problem is the following: During this controll-cycle I need to simultanously collect data from the same DAQ-device. At this point there is only one DAQ-assistant output-block in the main loop of the program and all the signals are derived from it to where they are needed.There is a case-structure (the bottom case structure in the picture) that contains the functions needed to collect the data during the test cycle. However these two actions, outputting data and inputting data, are not synchronized in any way which may be the reason why I get the 200279 error or alternatively the 200284 error during the test cycle. I've tried changing the sample rate, buffer size and the timeout time as adviced but nothing seems to help.
What would be the simplest way to solve this problem?
Help is greatly appreciated!
Attachments:
problem.jpg ‏206 KB

Thanks for quick reply.
However, I did try it (see the picture) but I still have a problem: I only get 100 samples / channel during the test sequence (all from the first seconds of the sequence) in total even though I've set the data aqcuiring DAQ-assistant as "continous" and "samples to read = 95k" and rate is 1000Hz.
Edit.
And lastly, I have trouble adding this "extra" DAQ-assistant to the vi. because I get an error about a resource (The 6353) being reserved, even though I connected a false constant to the "STOP" -input of the main DAQ-assistant.
Attachments:
is_this_what_you_meant.jpg ‏212 KB

How to control a digital output signal using the DAQ assistant?

I am using a USB 6251 DAQ board and would like to control a switch. I am gathering airflow, pressure, and acoustic data on the same board (analog input) and would like the switch to trigger when the airflow value is within a pre-determined range. Finally, I would like to reverse the polarity of the switch (to off) about a second after the initial digital signal, all of which is during continuous data acquisition.
I am able to actuate the switch only when pressing the "run" button in the DAQ assistant window. I am proficient with data acquisition but have never tried programming an output... Please help!
Thanks!
-a troubled researcher
P.S. I am running LabVIEW 8.5 as well.

blsmith4,
You probably won't get the control of the digital port on your card by only using the DAQ Assistant. One of the following examples should provide you the functionality that you would like out of the box:
Digital - SW - Timed Output (Simple)
Digital - Continuous Output (More Complex)
Continuous Write Digital Port - External Clock - Non Regeneration (Most Complex)
Let me know if these work better for you.
Best,
Jason M.
Applications Engineer
National Instruments

NI-DAQmx task works in MAX or DAQ Assistant test panel but not in LabVIEW

I am attempting to read a single AI channel from a PCI-6024E card via an SCB-68. I have created a NI-DAQmx Analog Input Voltage Task in MAX for this channel, sampling in contiuous aquisition mode at 100 kHz, 10000 samples at a time, with RSE terminal config. If I use the Test feature from MAX, the channel acquires data as expected.
In LabVIEW, I call this task using an DAQmx Task Name Constant. If I right-click this constant and select "Edit Task", the Daq Assistant opens and I can use the Test feature from the DAQ Assistant to see that the data is still being acquired as expected.
However, when I try to programmatically read this channel in LabVIEW using the VI "DAQmx Read (Analog Wfm 1Chan NSamp).vi", the VI returns a constant DC value of 500 mV, which I know is incorrect (I can monitor the signal across the two terminals in the SCB-68 with a DMM to know that the signal coming in varies as expected, and as I read using the test panels). This erroneous reading occurs even if I make a new VI, drop the task name constant on the diagram, right-click the task name constant and select "Generate Code - Example" and let LabVIEW create its own acquisition loop (which is very similar to what I already set up, using the "DAQmx Read" VI).
Any ideas why the Test Panels work correctly but the LabVIEW code does not?

Hello bentnail,
I'm not sure why the test panels are readin the value correcly but the LabVIEW code does not, but there are a couple of things we can try.
1) What happens if you just use the DAQ Assistant and place it on the block diagram? Does it read out the correct values?
2) Try running a shipping example that comes with LabVIEW. "Acq&Graph Voltage-Int Clk.vi" should work well.
3) What kind of signal are you expecting to read (peak to peak voltage, freqeuncy, etc.)?
Thanks,
E.Lee
Eric
DE For Life!

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
a file. The experiments run the whole day and I need the whole data
generated during this time to be stored in a single file, but I am unable
to store it in a single file.
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.
Thanks,
Sal

Struggling how to set up 2 daq assist on labview in the same VI

hi all,
hope someone can help me out
I am currently using the scxi 2345 with some SCC FT01 feed through modules, these are just to record some voltages from some transducers.
What I am struggling with is setting up 2 daq assist on a single VI, it is coming back with a error stating specified resouce is reserved and then a window saying learn more about automatic handling. How would I also have these 2 values logged on the same graph or chart?
Anyone any ideas how to set these up.
I ideally want to have 3 daq assist in the same Vi but not sure if this is possible. It would be 1 for thermocouple input and 2 for voltage as stated above
many thanks
shane dover

Hi Shane and Dennis,
I've been working my way around the same type of problems, and I am
currently re-writing everything to use on Asst. per board on my PXI
chassis, so that no resources become reserved.
As a result, I have to separate the signals on the output dynamic data
in order to do different post processing. So I have been toying
with staying with dynamic data, inputting dyn. data into an array, and
inputing it into a cluster. It seems that each has advantages and
drawbacks, but arrays seem to be the easiest with which to work when
splitting signals coming from a DAQmx Asst. and funneling some of the
signals into a post-processing sub-VI. The drawback to this is
that time stamps in the Dyn. Data are lost if you want to record the
data and the time of the reading.
Question: Is there an easy way to pipe Dynamic Data into a
calculation subVI? Is it workable after it's been split from
other streams?
Thanks,
Brad

Dynamically passing data into a running while loop from a DAQ assist. in an ouside while loop

Hello, I'm currently a student working on a senior project and I'm trying to do a state machine that will turn off and turn on a compressor depending on time and coprocessor failure.
In the run state, wich is #1 on the case structure box I placed the DAQ assist. Which takes in data from an accelerometer. If the accelerometer's value is above the limit four times it will end the loop or if the time runs out it will end the loop.
The problem I am having is that i need to run four compressors. I was thinking about having four case structures all within the outside loop, but I can only have the DAQ assist in one location. This means that I now have to move the DAQ assist out of the run loop or run all four compressors in the one case structure. If i remove the DAQ assist. I can only get it take in data once when the loop starts and never again. I understand why, but is there a way to dynamically pass data froma DAQ assist. into a running loop?
Also on a side note, i can't find a tutorial on how to really create a state machine using Enums. Does any one know where to find this.
I have attached my curent program.
Thank you for your help,
Ryan
Attachments:
TEST STAND STATE MACHINE 2-28-07.vi ‏288 KB

in labview choose file->new... then pick standard state machine and there are instructions.
you can create a custom control and either use an enum, text ring or menu ring. Edit the values and then save the control and drop into your vi and you can wire this to your case structure
- James
Using LV 2012 on Windows 7 64 bit

Daq assistant

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