data acquisition stops automatically

Similar Questions

• start/stop data acquisition

  Hi all

  I'm new to LabVIEW

  I want to create a program that can start acquiring data at 05:00 and stop at 19:00 and restart at 05:00 in the next day and so on

  The ilustration is as below:

  05:00 September 20, 2012 beginning of data acquisition

  19:00 September 20, 2012, stop data acquisition

  05:00 September 21, 2012 beginning of data acquisition

  19:00 September 21, 2012 stop data acquisition

  and so on...

  Can someone help me on this please?

  I have attached the VI below

  Thanks in advance

  OK, ok... im just a padawan! BTW, take care of your stress points...

  

• 6361 versatile usb data acquisition does not automatically detect the SCXI chassis/accessories

  versatile usb data acquisition 6361 will detect automatically SCXI chassis and accessories?

  Hello kdCMC,

  As far as I know that the SCXI-1600 USB Module is able to auto-detect SCXI Modules.
  This is also mentioned on page 11 and 12 of the following SCXI to start document:
  http://www.NI.com/PDF/manuals/373236m.PDF

  All data (including USB-variants such as the NI USB-6361) have only a 68 pin shielded cable (IO) between the DAQ hardware and the SCXI chassis.
  This cable does not auto-detect opportunities since it basically just "transfers analog and digital signals" between SCXI chassis and DAQ hardware.

  Is there a specific document that created the confusion on this subject?

• digital triggering of stop/start of analog data acquisition

  I want to use a signal from a digital line to start and stop analog data acquisition. The signal can change levels several times during a race of the VI so I have to start and stop several times data acquisition and store each session data in a different file.

  I tried to play with the following screw: digital triggering of break, DigitalStartandStopTrigger and ContAcq_DigTrig. None of them doesn't seem to work for my configuration. I also do continuous data acquisition so I can't use a reference. I use PCI 6259 DAQ.

  I used the "P0" pins rather than PFI pin on the grid BNC-2090. I know... stupid enough.

• Acquisition of data stops at data acquisition

  Hello

  See the attached VI.  Data acquisition acquires data without problem for a few minutes, and then suddenly the event structure does nothing but the timeout.  I'm deliberately ignore the 200279 error that is generated when two triggers are too close to each other, because I want to just ignore these triggers, but perhaps which also prevents tasks at a certain time?  I also tried to start and stop the task again in the case of timeout events, but it does not help (it causes an error).  Is there a way to prevent either the DAQ card (I use the box USB-6251) of the judgment of the data collection or a better way to ignore triggers that are too close together?

  I hope that I am making some sense here :-)

  Thank you

  Jeremy

  Jeremy,

  Thanks for letting me know about the 99% CPU usage.  It is definitely the cause of your accident and can be avoided by putting a funtion waiting with maybe 10 milliseconds in your timing loop.  However, if you want to keep avoiding strict with no node blocking, you will need to restructure your VI to use the Express VI of time elapsed since the range of Timing.  You will find examples of the use of this VI in detailed at the bottom help.

  Hope this helps, have a great weekend!

• USB 6008 data acquisition: automatically turning in a port

  Hi all someone could please help me.

  I need to autoamtically send output didgital since my data acquisition based on a value. the bottom of my little project. I read in a database if a value is equal to a certain value, I want to send a digital camera of the signal of acquiring data in a relay, so for example if the value 1 database generates a digital signl 0 7 port line.

  If someone could help it would be much appreciated

  So what's the problem with sending AUTOMATICALLY one. You simply compare the value of the database. A comparison function returns a true or false, which is quite ideal to display a true/false signal.

  Fix the code you wrote. This is not a service of howework and see some code real goes a long way to get detailed help.

• When I send a 5v of data acquisition, the voltmeter indicates 5V, but when I connect a "normally open" valve Parker for the acquisition of data, the voltage decreases automatically a.14 V. It seems to be grounded. Why is this happening?

  We send 5v data acquisition using a voltage generator. Hook us it up to a voltmeter and see 5V. When connect us the generator voltage to a valve "normally open" parker, the voltmeter indicates .14V. It seems that when we connect the two sons of the valve for the voltage generator, the son act as pattern. We want to control the voltage flowing to tap through Labview. We checked the wires to the valve and they work very well, because if we send a constant 5V since the acquisition of data and put ashore, she, the voltmeter indicates 5V. Someone knows why the son act as pattern and low blood to .14V?

  nsatpute wrote:

  Our data acquisition is NI USB-6259. The valve requires only a 5V max and our DAQ provides up to 5V. However, after connecting the valve to the acquisition of data, the grave tension to almost 0. We start from the principle that the son somehow act as the reason, but we are not sure if this is the case.

  The question here is not how much voltage the valve wants, it's the current needs of the valve.  The 6259 can put only 5mA via an analog output.  Your very likely tap needs much more than that.  If you need to add in an amplifier circuit that can supply more current to operate your faucet.

• Satellite M100 stops automatically after about 10 min

  Hey there guys :)

  My Toshiba laptop has been powered off abrubptly and lit, it's own lately.

  When I turn on my computer laptop, everything appears fine, if fully charged battery, AC adapter / CC plugged in etc. However, after about 10 minutes of use, it will be just turn off and make some noise "zoip" or similar. Turn the laptop back on right after work, but I find it only remains on for 4 minutes before doing the same thing. Turn again reduces the time it stays on, sometimes not even go beyond the boot sequence.

  However, if I leave it alone for a few hours and come back, he's going to stay for about 10 minutes again, before going through the same process.

  I have a warranty, but I am hesitant to take my laptop because I don't want to lose my files.

  So I hope that someone here has a solution for my problem :)

  Thank you
  Osman

  Hello

  Sorry to say, but I think it s a hardware problem. This portable strange behavior seems to be a simple overheating!
  The laptop supports thermal protection to prevent the equipment from damage.
  If the temperature rises to a higher level, that the laptop stops automatically. It is a fact and nothing unusual in this case.

  Especially the fan cleaning helps but sometimes the laptop must be open for a professional cleaning. But beware: I n t recommend opening or removing the case! You lose the warranty!
  Maybe an aspiration would make it.

  Anyway, you said that you will not lose the data on your HARD drive. Well, I wonder why you n t create a backup of data, you can also remove the HARD drive and connect it via external USB controller on the second PC and can save the files to the other HARD drive.
  After this procedure, you must put the HARD drive in the laptop and try to reinstall the operating system.
  If this does not help, I would recommend taking the guarantee.

• 15 - r235ne: SM bus controller / IBD DATA Acquisition and Signal Processing controller

  Hello team

  I am facing problem in finding the right driver for material below.

  1 SM bus controller

  2 IBD DATA acquisition and Signal Processing controller

  kindly help

  concerning

  NASIR

  Hi, Nguyen:

  Download and install the Intel chipset installation utility and restart the PC.

  The 2nd driver down on the left is the automatic installation file.

  https://Downloadcenter.Intel.com/download/20775/Intel-chipset-device-software-INF-Update-utility-?product=1145

• Configuration of the two of the same model data acquisition

  Hello, community of NOR.

  I'm an intern in mechanical engineering with experience in base with LabVIEW.

  I would like to speak to OR directly on this issue, but I don't have a service contract and my company wants me to understand this before you buy LabVIEW.

  I hope that someone has experience about my question, and I would be very happy to help.

  We intend on purchasing an expansion card for our acquisition of data (OMB-USB-2416), but unfortunately it is offline and no custom would not happen in time.

  So, I need LabVIEW to read voltage HAVE two of the same model of data acquisition, which would amount to about 30 channels.

  Is this possible with LabVIEW?

  Thank you.

  Measurement computing says that the "physical channels" dropdown list is automatically filled in once both devices are configured.

• How to increase the speed of data acquisition?

  Hey, currently I using 6210 OR of data acquisition and control switch. I used labview to periodically check the 7 switches and read data from 7 channels in the meantime (1 sample on request). I ran 70 loops for 10 groups of data, the cost of the time looked like 2.2 seconds.

  I would like to end a 700 loops in 2 seconds, is it possible to improve?

  Thank you

  PEM

  Look at the Terminal stop of the DAQ Assistant Express VI. You are starting and stopping of the task for the acquisition of data on each iteration of the loop.

  Starting from the help file:

  Stop

  Specifies to stop the task and release device resources when this Express VI ends execution. For ongoing tasks, this entry is FALSE by default, which means that the task is running until the application terminates. To stop the task, you can use the device again in the same application, wire control wire you the Conditional stop this entry to the same terminal of the while loop. For single-point and finished tasks, this entry is TRUE by default, which means work stoppages after all samples are acquired. To optimize the performance of single point when using this Express VI into a loop, wire control wire you the Conditional stop this entry to the same terminal of the while loop.

  Also from the help file:

  Continuous single point of entry or exit, the of VI Express DAQ Assistant cannot allow optimal operation. See Acq & chart voltage-Single Point optimization VI in examples\DAQmx\Analog In\Measure Voltage.llb for an example of techniques to create more powerful applications, single point of I/O.

• the relay control data acquisition

  I am creating a vi that controls (press and release) several relay using a USB 6501 data acquisition. This should be a task relativily easy but I get flumoxed by errors. I tried to use the examples, but I get an error telling me that I need to use the mode of generation 1 sample (on request). Help, please

  Sure. The easiest way is to have a DAQmx writing followed by a function of delay, followed by another entry, followed by another period. Simply plug the error links in order to control the flow of data. However, the VI would be insensitive so you can use a state machine or function elapsed time so that the VI can be stopped without waiting for waiting for him at the end.

• 2 channels of AI on a data acquisition with the range of different sensitivity

  This vi is based on the 'new project' state machine on the home screen at the start of LV.

  A time loop is parallel to the main loop of the state machine, shown in the picture.

  It works continuously until you press the Exit button.

  The problem seems to be in start this... > read >... stop start > read >... stop along the error line.

  The reason for this clumsy arrangement power is measured voltages are in two lines of different sensitivity.

  The shunt voltage is small and needs-. 2 to the range of V.2. The load voltage is greater and 09:50 V range is good.

  In the initializing state, two separate vi 'create a channel' have been used to specify the range of voltage to the physical channel. The corresponding tasks are sent via via local variables.

  DAQmx errors happen randomly, sometimes the first iteration, sometimes the 50th.

  I tried to disable one or the other start > read > stop for the shunt voltage or load.

  I tried replacing them with the DAQ assistant.

  I tried various DAQmx vi: "wait" and "accomplishment of the tasks by resource cancel selected".

  But error-50103 "specify resource is reserved" keeps popping up.

  Is it possible to create two tasks on the device even when they are not used at the same time?

  The only reason is to measure in two voltage ranges.

  Win 7 Pro 64-bit

  2014 LV database

  Data acquisition equipment: USB-6210

  Thank you.

  This has been discussed many times. Do NOT use separate tasks. You can use different ranges for different channels with a single task. Just wire the task from one channel to another channel to create task.

  You also use local variables when they are certainly not needed.

• Write data to data acquisition in a .txt or .csv file

  Hello

  I want to write the DAQ data inot a file .csv or .txt, so I'll try to handle 'Write in a spreadsheet file', can cause I can record data in all formats. My concept is that data acquisition data will save in a file continuously when I press the button IT and when I press STOP button then it will ask the user to save the file.

  I have attached the file VI.

  But my problem is that every time he asks me a new file even if I put the file append as true.

  All of the suggestions.

  Thank you

  Chotan

  Try this

  

• Why data acquisition in an executable collect fewer samples?

  Hello

  I have LV2012 on Windows and SMU-6341 map in PXI chassis.

  I have a task for the acquisition of data on I-1 on my monstrous application. Well, to get to the point, I have here a case where the task of data acquisition starts, waiting 20ms, reads all available samples and puts an end to the task. For the parameters see the piece attached. Then, the collected data is plotted on a waveform graph. Usually about 200 samples are taken in the case of data acquisition. Then loops shown sequence, until certain conditions are met.

  Unfortunately a problem occurs when I deploy a rack application (exe) on a production PC some 600 miles away from me.

  This is an example of what I get on my development PC (LV and runtime give similar results):

  

  This is an example of what I get on the production of exe PC (13 iterations, bad luck ):

  

  It totally looks like the data acquisition task mentioned seizes one sample to an iteration of the loop.

  I enclose a noodle dragged out of the main program. I'm about to test the version of this noodle on the production of PC in a few hours, but I would like to hear all the ideas that emerge.

  Thanks in advance!

  cubz wrote: from my experience, the continuous 'Samples' mode does not stop when the buffer is full. The loop of 4 seconds (with 10 k samples/s in the sample buffer 40 k)-that is to say samples how finished works IMO.

  If the buffer is filled in continuous mode of the samples, you will get an error.  I'm sure it's something you don't want.  In this example, you have provided, you really should have finished samples and has said the acquisition of data to read samples of N.  It is the only way to ensure you get all the data you want.

  In regards to your differences between development and executable, the executable file tends to only not nearly as happening (Debug stuff for the most part), so it tends to run faster.  If you're depending on a software clock, anything can happen (having a ton of little or no data).  That is why we say you use the clock machine and get the number of samples that you actually want.