DAQ Assistant sample size to avoid 200284 error
I am trying to measure the frequency a 0-14V pulsed output from a turbine flow meter and keep getting the 200284 Error. I am using the cDAQ 9178 chasis and a 9401 digital card and taking the signal in...
View ArticlePNP input to PCIe 6612
What is the easiest way to connect a PNP (current sinking) encoder to a counter-timer? I need to trigger some electronics using a PNP encoder, and it appears the 6612 counter-timer only accepts NPN...
View ArticleSpeeding up quadrature encoder read out
Hi,I`m using a quadrature encoder together with a 6259 DAQ Card and BNC2110 Terminal Block.I managed to have it working with the DAQ-Assistent at 80Mhz using the Counters and reading one value at a...
View Articleevent counter misses events
The only posts I saw close to this are quite old and I didn't see any real solutions so.... I am using LabVIEW 2014 with a PXIe-6612 counter/timer to count fringes in a Michelson interferometer. I need...
View ArticleRunning 6 counters at the same time
I want to use 6 counters in NI PCIe-6612 at the same time to count pulses from 6 channeltrons, and I found that the counters miss some counts when I use TTL out of a function generator as a test...
View ArticleAbsolut timing/ triggering of CI pulse time
Hi, I am fairly new to NI-DAQmx and trying to measure the length and absolute position of digital pulses (high times and low times) relative to a second trigger signal. The VI CI Pulse Time allows me...
View Articlecounter is not ready
Hi, I am trying to use a counter out from NI 6221 and change the output frequency of TTL waveform on the fly. I have used examples from NI and I figured out I need to use property node of " Couter...
View ArticleClik here to view.
Ni7842 FPGA RIO board loop rate
Hi, Is it possible to achieve a loop rate of 1us with the Ni7842 RIO board. It has an onboard clock of 40MHz. I have tried the following approaches to achieve a 1us loop rate and generate a single...
View Article74161 RCO ENT cascade issue
Hi all, I am building a simulation of an old 70s design based on 74161s and I have had a lot of trouble getting a set of counters to operate according to my expectations. In my search for understanding...
View Articlectr0 retriggerable
Hi，I'm new to NI-DAQ. I have a board named PCIE-6321,I want to generate pulse-train with dev1/ctr0,but i want to change the frequency of the pulse-train sometime,How can I do it with C++;here are my...
View Articleuse AO0 generate nagetive pulse-train
hi , i have a board pcie6321 ,and i want to generate nagetive pulse-train,such as the -5v square wave ,here is my code ,but it dosen't work ,it seems that the wave just have -500mv,how can I do to...
View ArticleNI 6602 frequency change How to
Hello! I would like to use the NI 6602 Counter in other frequency base than 80MHz, I have read about it, but still couldn't figure out how to do that. I know that I need an other counter to set the...
View ArticleUpgrading from Legacy code to C# - need help configuring counter input and...
I am in the process of upgrading some legacy Visual C++ 6 code that was programmed against the NI PCI-6034e card. The card that was identified by NI as an equivalent replacment is the NI PCIe-6321...
View ArticleClik here to view.
Retriggerable gated counter or analog pulse trains
Hi all, I have a problem I could not resolve in the last days. It might be even a question of creativity of how to come up with a solution. I have an external pulse train 1 at ca. 8 kHz (frequency not...
View Articleusing an analog sinusoidal waveform as clock signal
I was wondering if it is possible to use a sinusoidal waveform as clock signal on the PCIe 6321 card and how it is done in LabWindows. I would like to sample my analog input on the peaks of the...
View ArticleWhy does my linear encoder only read negative?
I have a linear encoder I am trying to utilize with an NI cDAQ 9184 & 9401. I basically used the linear encoder example I found here on the NI website, however, when I run the program I am finding...
View ArticleHelp with PCI-6602 gated counters
I'm trying to help a researcher get a PCI-6602 working as a four channel gated counter. They want to read and reset the counters at about 350hz, putting the readings in a buffer to get a continuous...
View ArticleCounting pulses using PCI 6602
Hello, I want to count TTL pulses from an APD using PCI 6602 counters and Labview.I have gated the APD signal using an external clock.I I generated this signal using PCI it has 2.5microsecond on time...
View ArticleEdge counting using nicaiu.dll
I am trying to create an edge counter by directly calling the functions in nicaiu.dll from VB.NET. I am able to read the counter value OK but the counts always return back to the original value set...
View ArticleCount Digital Events with Pause Trigger [ Count only for certain no. of...
Hi All, I have PCIe 6320 and I am currently using "count digital events with pause trigger". If I only want to count for 5 trigger, how should I do? Thanks,
View Article