measuring counter periodicaly
Dear all, So I have a counting edges task :DAQmxCreateCICountEdgesChan(aoTask, "Dev1/ctr1", "", DAQmx_Val_Rising, 0, DAQmx_Val_CountUp);wich I can interogate by the click of a button...
View ArticleMultiple edge separation measurement
I wondered if someone could tell me if this was possible or how I might set it up if it were. I want to do a variation of Two-Edge Separation measurement with an NI PCI 6602 and DAQ-mx, but with...
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Simple Period Measurement
Hopefully this will be an easy one for somebody, but working on site under pressure and I can't see what is wrong I have a PCI-6351 card and I am testing it with NI-MAX, I setup a simple task to...
View ArticleCounter clock from PXI
Hello, I thought it is a simple problem but still I was not able to solve it. I have a very generic counter VI as shown in the snippet.The counting signal is a non-periodic TTL. The VI fails if this...
View ArticleFast simultaneous edge counting without stopping the task
Hi all,I am trying to do edge counting with two counters simultaneously. The idea is to use them for photon counting application with two detectors. For this I use the third counter for...
View ArticleExternal sample clock with encoder
Hi everybody, I have an external encoder wired to a 9423 module on a 9185 chassis, where i count the impulses of the encoder using channel A and B.I also have some sensors connected to a 9205 analog...
View Articlecontador de tiempo y suma de paro
Buenas noche e logrado hacer un contador de tiempo transcurrido, como por parte de proyecto de la universidad esto lo e hecho con el shif register pero a donde quiero llegar es que también el...
View ArticleHow to use counters NI 6363
HiI got to use the counters on the NI 6363. My problem is, I got a nearly full card.So my question is. If I use a counter out i.e. CTR 1 OUT, can I use the other pins (CTR 1 Aux/SRC/Gate) for some...
View ArticleDAQmx large range 2 counter frequency measurement 1 count off error
I'm using a NI PXI-6229 to measure a 32.768kHz RTC ref clock. I'm setup in MAX with a task using the largerange2 counter frequency measurement, as I need a very precise measurement. Every say, 1 in 30...
View ArticleTaking time measurements when measuring frequency
I am needing to read the frequency of a TTL signal as part of a data acquisition program that also records analog voltage (at 6 kHz). I've looked at the shipping examples for Counter - Read...
View ArticleUsing NI 9205 module, external trigger into the PFI0 input.
I'm trying to put my external trigger into the PFI0 digital input. When I connect up my hardware clock, it loads down my signal. After putting a DC meter on the PFI0 line, open ckt, I see 1.85vDC...
View ArticlePWM input with CompactDAQ & LabWindows
I need to measure the pulse width of a 244Hz PWM signal using CompactDAQ. Is there a white paper or tech note out there to help me set this up?
View ArticleCan't read data for the same lap from two counters
HiI am using NI 6624 counter board and building an app in C#. I have one counter (0) which counts edges of Index pulse (Z) from a Angle encoder and triggering on PFI4 on rising edge of Z pulse. Where I...
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NI 9411 Continuous Edge Counting - external sample clock
Hi I have a DAQ setup that uses the following:Chassis NI cDAQ9188NI 9411Quadrature Encoder I want to make continuous buffered measurement of position reading from the quadrature encoder. I first set...
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DAQmx Channel Property node for mixed counter task, error 200452
Hi Folks, I've a task where I'm measuring 4 frequencies and 1 encoder (A/B).I want to enable and set the filter on the frequency channels. This works, if I remove the encoder channel from the task, but...
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2 finite pulse generation by a counter triggered by one counter
Hi guys,I am using NI USB-X 6353 and 6343 for a test system. I need two sequential pulses from a counter after triggering it with another counter on the same board. I would like to start the trigger...
View Articlecan't run example of DigPulseTrain-Cont-Buff-ExtClk
Hi all, I was trying to run NI DAQmx example of "DigPulseTrain-Cont-Buff-ExtClk", but there is an error generated once the external clock is supplied at frequency of 1 Hz as specified in the example....
View Article[NI 9361] Dynamic Averaging on Period Measurements not working as expected
I am trying to demodulate a frequency modulated square wave by using a NI 9361 counter on a NI 9174 chassis. I am measuring the period length in ticks, but it is always quantized at 2k ticks. At lower...
View ArticlePXI-6602 Counters
I am using a PXI-6602 card connected to a SCB-68 break out. I am able to generate an output from CNTR 0 and CNTR 1. None of the other counters 2 thru 7 appear to work. I monitor their outputs with a...
View ArticleCounter logic confirmation
G'day, I'm coming here from this post, with the aim of confirming my understanding of counters in Labview. I've tried to build stable, accurate square wave output waveforms using software timing, which...
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