using dll in labview realtime
Hi to all,I would like to know the best way how to open a file DLL in labview.I created this dll with matlab, real time-workshop, nidll.tlcafter that I have to use these dll in a real time VI, for...
View ArticleTwo separate loops to run simultaneously
Dear Friends ,I haven solved a my problem .The problem is i have two loops #1. To run the motor front and back in sequence structure.2. To measure the motor revolution continously in while loop. I...
View ArticleInvoke node unfonctionnal after compiling
Hello, I'm currently trying to use an invoke node (I'm not using an english LabVIEW so I don't know if the words are exactly the same translated) : Obtain VI / Editor VersionWhen I'm using it in my .VI...
View ArticleMin and Max On An Array
Hi. I want to realize a program where I want to generate a sine and take only the positive monotonic part. So i tought to find the min and max index of the function and realize a program like the one...
View ArticleSetup discrepancies between traditional Daq and DAQmx with SCXI1120D module...
Hi, I posted previously about setting up a SCXI 1120D module in DAQmx (http://forums.ni.com/t5/LabVIEW/SCXI-1120D-setup-using-DAQ-assistant/m-p/2412476#M745405) and I have recently come back onto this...
View ArticleHow to validate a reference?
I have a VI which can be used as a standalone VI or a subVI. I'd like to determine which instance it is being used in by determining if there is a reference wire into the control or not. So if ref...
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how do I seperate data in waveform
Hello, I have a waveform of data with a sinusodial wave, with spiky noise in it. How do I condition the signal to seperate the noise from the wave? I can filter it with an Express VI to remove the...
View ArticleTime not stopping with while loop
Hello, I've attached my VI. I am having trouble with while loops. I want to turn on LEDs. The first LED should turn on after 3s. The second LED should turn on after 5s. The third LED will turn on...
View Articlearb waveform
Hi,I'd like to generate an arbitrary analog waveform, e.g. a step function where the voltage increase 1 V each step and where the voltage is hold for a certain time. Or an analog signal e.g. 5 and 0V...
View ArticleFPGA DMA timing
Hi all I would just like to confirm that my understanding of DMA transfers is thus far correct, and then ask a couple of hopefully simple follow up questions! I wish to sample 8 analog inputs (PXI...
View ArticlePrompt User in a Parallel Process
Hello, I'm developing a software where I constantly read data from an equipment. In this software there is a command that requires a password to be input. I was trying to use the Prompt User for Input...
View ArticleInteger Overflow with IMAQ ArraytoImage
Hi all, I am working on a relatively basic image acquisition and display .vi. One of the goals of this .vi is to calibrate our hardware by splitting the original image into 4 quadrants. We then perform...
View ArticleExecute Case Structure with Button Press Slows Down VI
Hi - I'm fairly new to LabView, and I am having some issues with using a button to run a timed while loop. I am writing a VI that outputs a timed voltage pulse to an output channel on a DAQ; meanwhile,...
View Articlelow pass filter with formula node
Hi guys.My teacher gave me an exercise (attached) in which i have to realize a low pass filter with the formula node. He gave me also the input/output but I have no idea where to start.Can you help me?
View ArticleArray Doesn't Reinitialize
In my experiment system I want to generate an array of 4 columns by a variable number of rows that will be written out to a DAQ unit and drive the experiment. My current efforts creates the array I...
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Need help with timers...
I am building a building a machine that uses smallish vibrating motors. In order to overcome inertia, when they are still, a higher voltage must be applied than would be required to run them at low...
View ArticleEvent structure freezing when short delay inserted
Well, the simple stuff in LabVIEW I can do, but I'm still struggling to get my head around the concept of "Events" and how LabVIEW handles them. If I only have one type of event (i.e., pushing a button...
View ArticleCan I put a READ function in a TRUE/FALSE case structure?
Hi, I have a vi that operates as controller for a mechanical system of motors. There are several sensors of various types, that provide input to the vi, including encoders, whose period is being...
View Articletask is done does not work for multiple finite digital output task calls
I need to create a program that cycles two digital lines a variable number of times for a finite duration each time. Several years ago, I modified the Multi-Function-Synch AI AO.vi and called it to...
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