No count output / pulse pulse does in a meter of pcie-6320

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• Want CMOS output pulse

  Hello

  I would like to know if there is any couters who can count CMOS output pulse.

  The coast of CMOS pulse are:

  Pulse output: 5 v CMOS

  Output pulse width: 10 ns

  (It is actually the output of the unit of counting photons Hamamatsu C9744)

  I have some cards PCI (6014 and 6110), but their logic of meter is not TTL, CMOS.

  When the CMOS output is connected to a meter of these cards, the number of meter

  has increased, but it may not be a correct counting.

  If you have a good idea to count with the products OR, please let me know.

  Thank you for your time and your help.

  Hiro

  Hey, Hiro,.

  The essential is that a TTL meter will be able to read the introduction of CMOS, but not the reverse. Therefore, you are OK. This is mentioned in the last line of this link: http://digital.ni.com/public.nsf/allkb/5AB6172CAE2BEF3E8625629800597B3F?OpenDocument

  An explanation of the thresholds of tension associated with each level in the chart in this link:http://www.interfacebus.com/voltage_threshold.html

  The counters on your devices covered by standards TTL/CMOS, who can count a pulse input CMOS. Some general information on each standard can be found at this link: http://digital.ni.com/public.nsf/allkb/2D038D3AE1C35011862565A8005C5C63?OpenDocument

  Kind regards

  Jeff L.

• I want to generate a pulse of a meter train and count the pulses with the other counter on a USB NI DAQmx 6259.

  
  

  Salvation;

  Here is the solution for your problem.

  The cause is that "Gen dig Pulse Train-Finite" uses Ctr0 both Ctr1.

  Please refer to:

  "When you do a finite pulse train generation, a counter generates pulse train, and the other counter generates an impulse that acts as a barrier to the first counter. If you change the pulse train to generate continuously or

  only generate a pulse, you can run two tasks of meter at the same time without error. »

  http://digital.NI.com/public.nsf/allkb/04BEDD9E9E91ED3486256D180048116D

  I used Ctr0 and Ctr2, jumping Ctr1 as it is reserved by "" Gen dig Pulse Train-Finite ". I works very well.

  Kizito.

• Counting digital pulses

  Hello everyone,

  I need to count the pulses of a digital signal. I looked at the examples associated with it, but all seem to use a signal acquired by a digital counter entry. I already have the signal in my computer, so using a device entry makes no sense. And the library of functions, I looked but found nothing. What features LabView should I use?

  Thanks in advance for your time and help,

  Pablo Concha

  You can go there. 8.2

• count the pulses ttl only on 2 V

  Hi I have a problem while I was trying to count a pulse ttl using the DAQ Assistant. The problem can be simple, but I just can't solve that since I'm new to LabView.

  There is a TTL pulse produced of our ODA that is about 30 ns width, 5V. I want to use LabView to perform the count of photons. But because of the noise, I want to put a number limit of 2V, so the software one count higher than 2V TTL pulse. But I can't do that. There is no option to set the limit.

  And our material is BNC-2110 and PCIe-6323.

  Can someone help me with this? Thank you.

  For a counter entry, the minimum voltage for logic there is 2.2 volts - a ttl level. And no, you can not adjust higher.

• NI9403 for counting of pulses

  How to use the NI9403 module for counting of pulse device? We test engine GE ECM and provides a signal of 32 pulses per revolution.

  Hi Change_Air,

  In short, you might want to consider another module (probably a 9401 or 9402 according to the type of desired connector and/or the number of lines required).

  Modules with 8 lines or less (e.g. 9401, 9402) use a dedicated line to transfer the data from each of its inputs on the chassis backplane and are therefore capable of routing of external signals such as timing/triggering signals (for example one of the counters on a backplane cDAQ).  However, modules with more than 8 lines must transfer the data serial to chassis backplane and so tickets are not available for routing.

  Assuming you are using a bottom of basket cDAQ newest (any carrier except the x 9172 or 916 cDAQ), from 9.3 DAQmx you can configure a sample clock and acquire a digital input buffered on modules that transfer data in series (I think the 9403 can taste up to 1/7 US = ~ 142 kHz).  So you could end up with a table in the data buffer (for example [0 0 0 0 0 1 1 1 1 1 1 0 0 0 0 1 1 1...]) which you could then analyze to determine the number of edges.  Of course, the impulses must stay high for at least a period of your sample clock to ensure that you are able to detect.

  If you're on cRIO you could set up something similar, but the same restriction applies always - the limit is the maximum rate that data can be transferred in series of the 9403 inside of basket.

  Thus, although it is probably possible to get what you want with the 9403 (according to your pulse width), a "parallel" module would be much more effective in the detection of the short pulses (if it was a requirement) and would be simpler to program as well - you could just set up a task of edge with a meter count (assuming that the cDAQ).  There's a Developer Zone article containing a list of all series C, but it seems to be incorrect for several modules (perhaps an employee NOR will see this) about the nature of the series/parallel data transfer for the DIO modules.   I am not aware of any exceptions (and do not think that there should be none) to the rule that modules DIO with 8 lines or fewer are 'parallel modules' and DIO modules with more than 8 lines are "serial modules" (there are rows of data exactly 8 connector d - SUB between each module and chassis).

  Best regards

• How to count the pulses with digital input on 6351

  Hi all experts in Labview,.

  I just got my USB x series 6351 and it works fine, but I certainly lack of labview skills to use it to its full potential.

  I would like to read digital pulses with several digital inputs and count the number of pulses each T interval in time. All impulses that I entered on any edge of the clock are not synchronized and can occur at random times during the tests. Basically I have an oscillator of square waves can I modulate the frequency. I don't want to use the meter as inputs as I'm limited to only 2 entries (if I use the option 2 input meter for metering of pulses or frequency). The input frequency can range from 0-1 kHz and goes 0 - 3V. So not too fast, and I shouldn't make too many mistakes trying to get the count of pulses and then back out the frequency in accordance with article ni.com on counters.

  I would like to read the 8 digital input channels and get the number of impulses for each channel. I searched high and low for help online but can't find examples that have been useful. Anyone have any ideas on how to go or direct me to a resource? Thank you very much in advance!

  Are you worried about getting the number as a physical operation timed?  It would be nice to acquire a digital waveform and then postprocess on it to detect how many events took place?  I've attached an example that shows how you can accomplish this. It reads a digital waveform and then uses a detection of crete VI to determine how many pulses occurred. Should be a few adjustments to your particular signal.  The VI I use seems to count events twice (probably count each edge), so counting it gives should be reduced by half in order to work.

• How to count the pulses using RIO (FPGA)

  Hello

  I want to use RIO (FPGA) for counting the pulses produced by a sensor,

  but I don't know how to program. can someone help me.

  Thanks in advance

  CAIX wrote:

  Hello

  I want to use RIO (FPGA) for counting the pulses produced by a sensor,

  but I don't know how to program. can someone help me.

  Thanks in advance

  Search for example for 'Meter of RIO' finder.  There are dozens of examples that should help you.

• Can PCI 6602:How I use digital lines of the Board of Directors and at the same time to generate trains of pulses by using a meter?

  Hello!

  My problem appeared when I tried to update my traditional NOR-DAQ legacy code to DAQmx.

  I use 2 meter (meter 5 and 7 meter) on PCI-6602, to generate trains of pulses, as well as the lines of e/s digital port 0 (the form lines from 0 to 7). What I do in my request, it's that I'm starting to generate the pulse train on the output of 2 meters and after that I play with the State of digital lines.

  Traditional, it was no problem to use the meters and digital lines at the same time, everything went perfectly, but in DAQmx, is not possible.

  What's happening: I start generating train of pulses on the output of counters, no errors, but when I try to change the State of a line of digital port the generation of the pulse train is stopped. What happens when I start the task associated with the digital way.

  My question is: is it possible to create a channel on digital lines without changing the channels created for meters?

  Another thing that I managed to do with the panels 'Measurement and Automation Explorer' and Test for PCI-6602, is basically the same thing, I generate trains of pulses on the output of the 7 meter and try to start a job on the digital line, but I get an error:

  "Error-200022 occurred in test Panel.
  Possible reasons:
  Measurements: Resource requested by this task has already been reserved by another task.
  Device: Dev4
  "Terminal: PFI8.

  On the contrary if I use the counter 0 or a counter 1 to generate trains of pulses I encounter the same problem.

  What resources are used by 2 to 7 of the PCI-6602 card counters and the counters to 0 and 1 do not use?

  Thanks in advance for any answer!

  Ciprian

  After doing some real tests on this device, I found that it is a normal behavior for the jury of 6602.  This is because when you start a task digital all 32 lines are configured for digital i/o, so it replaces your meter operation.  The article below the link explains a little more on this subject.  You must start the digital task before the task of counter to use the features of both in your program.

  2 meter and above will not work correctly when you perform digital i/o on NI 6601 or 6602

  http://digital.NI.com/public.nsf/allkb/43F71527765EEC3886256E93006CD00C?OpenDocument

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  IM using PCIe-6320 series daq x to generate trains of pulses. I went through the examples found in the labview to generate digital impulses. Provided vi runs without error, but I could not find any pulse output in my PIN ctr0. Is there a specific connection to check the output?

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