Store (arduino) analog data in a 2D matrix

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  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.

• How to record measured analog data on the PC?

  Hello

  I am a beginner in the real-time hardware. I have the cRIO-9024 controller and the cRIO-9112 chassis. I have a few questions:

  (1) I can't see the examples because Labview 2009 shows that The NI Service Locator is not running. I just installed Labview 2009. How can I solve it?

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  Thanks for any help and examples, whether it would be possible.

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  If you do not have the FPGA module (or just for now) the solution you gave with the filter would be OK. Place a second loop for file IO (and possible your communication to the user Windows interface) would be a good idea. Do not forget that you are using on the function of file create the file path represents the drive of the controller cRIO (which is mostly a c drive). You can send via FTP to the RIO DC (using the IP address) and have a look at the files.

  A suggestion to get this file programattically is that the cRIO controller sends the file name of the Windows user interface (after the closing of the record), with the Windows user interface, you can use the FTP functions in Labview to get the measures file.

  Best regards

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  I use the card PCI-6111.

  I am trying to acquire analog data on channels dev1/ai0 ai1/dev1 using pulses of external clock connected to the PFI0 channel. I also want to trigger the acquisition, when the channel dev1/ai1 signal reaches certain level. I send a triangle wave channel dev1/ai1, and I need the data only for the front.

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  Task name: _unnamedTask

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• Acquire analog data entry triggered by the great time and low time of a pulse meter

  Hi all

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  Acquire the pulses of the meter on a different path to analog input.  When it is high your sensor is activated.

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• Send the meter digital outputs while gaining analog data

  Hi all

  I'm looking to acquire analog inputs on several channels and send simple TTL pulses at different times during the acquisition using a Board from UBB-6221.  Delays at the outset of the acquisition and the release of life should be handles by a control on the front panel.  I got it work using the software timing and an inexpensive board before, but the program needs to be more specific than that (so timing equipment).  I write the program using DAQmx and LabView 8.2, but if necessary, I have 8.5 available as well.  I know well the General LabView program, but'm not comftorable with DAQmx, which I suppose I should use (I only really used the Wizard).  If there is an example of this somewhere, or if someone has done in the past, I would really appreciate the help!

  Thank you!

  Hi LVhelpME,

  There are a number of different ways to do it, but I created a quick method that makes a digital waveform with the number of samples and asking rate and then allows you to specify at what time you want to insert a "trigger" (which basically means that he will place a high in at this point in the waveform). I did this using only 3 functions and a loop that traverses according to triggers and how you want to insert. You can use a similar method or just make this code in a Subvi, which will create your digital data correlated according to the total number of samples, sampling frequency, and the specified time you want the triggers occurs to. I have attached the VI below for LabVIEW 8.0 and later versions, as well as a screenshot showing what the digital waveform will look like based on what values are entered for moments of relaxation. In the screenshot below, you'll see that there are 2000 total samples that are emitted at a frequency of 100 Hz. Thus, the total waveform will last for 20 seconds, and the trip times are listed as 5, 10 and 15 seconds.

  

  The following image shows a zoom in view of relaxation that is created during the second 5 brand, which will last for the sampling period of 0.01 seconds (100 Hz sample clock period).

  

  Hope this helps,

• Logging and analog data RS232

  Hi guys,.

  I try to save my RS232 instrument data and also include a couple of analog inputs.

  The vi works 'ok', but not exceptional.  First, the frequency on the daq assistant must be placed very high to see a resonable on the screen refresh rate.   Second, the synchronization time is disabled on the data being saved rs232 (node of unbundling) and the analog inputs.

  I like the wizard daq and writing table vi only because they are simple to implement.  Not too familiar with other methods.

  Any thoughts on how to make these 2 numbers (and a few others) better?

  Formatting of the front face is still be tweaked. See attachment.

  It's an instrument driver updated the vi and vi instrument driver library.  I hope this works for you guys.  Thanks for the help.

  Thank you

  Darren

  In the Point.vi of the value, there is a Subvi, called ReadSerialBuffer.  He reads port 1 byte at a time until he receives nothing or the carriage return character.  Then the loop ends and clears the buffer.

  First of all, it shouldn't be necessary to clean the pads because you read essentially until the buffer must be empty.  It may take some time for VISA really clear stamps.  Since it is something that Hyperterminal certainly doesn't, it could be an explanation for the moment apparently longer.

  It seems that you have the stop character in your INIT vi, but it is set to a default character of line jump.  Reading your ReadSerialBuffer vi is until you get a carriage return character.  It would be wiser to set your stop for the carriage return character, and then read quite a number of bytes.  It will be automatically terminated on the carriage return.  It would be much more effective, and then read one byte at the time and no loop would be necessary.

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