Deterministic loop is delayed when rewriting continuously buffer of the OD

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  I have a pretty heavy program that iteratively takes a series of measures from a number of channels using a variety OR-Switch and OR-DMM screws that I assembled as a result of various examples and several help pages. Each channel is sampled once during each iteration with data to be saved in a text file for later analysis, after it is imported into Excel. I added to the screen 'real time' indicators and charts to see what looks like running data.

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  I want a 'Stop' button that ends the While loop, at the next opportunity, but it is not working properly, I think, because the stop button does not play with good timing, because the program runs either the loop For or the time delay at the beginning of the While loop. 'Next opportunity' can mean 'Immediately', 'at the end of the next iteration of the loop,"or"at the end of the next delay schedule." I think that if I get one of these scenarios to work, I can get an any of them to work!

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  I have a problem of severe weather that I don't know how to fix it because I don't know exactly where it comes from.

  I order two RF switches via a data acquisition card (NI USB-6008). One job at the same time can be selected on each switch. Basically, the VI created for this feature (by a colleague) resets all the outputs of acquisition data and active then those desired. It has three entrances, two chain simp0le controls and a cluster table, that contains the list of all the outputs and some practical information to know what is connected (specific to my application).

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  Your SetReset_DO VI creates a channel whenever it is called.  And that you never delete a task.

  When running continuously, that it's as if it only runs once and LabVIEW has internal mechanisms to close references that will not be used again.  When a VI is used as a Subvi, LV does not know if she will be called again, and lacks these things until the first level VI stops. You have a memory leak.

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  I started a few weeks ago a pretty big VI. Most of the program is included in a large loop. But I feel it's to slow down unnecessarily. So to optimize it, I would like that the VI only works when the mouse or keyboard is acting on it. It would free up the CPU when I do not use it without having to shut it down. I found on the internet how to use the "wait for" to slow down the loop, but in doing so, some parts of the VI that must run in real time also slow down. I think that my idea should be more effective as well for applications in real-time and to free the memory.

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  Hello

  You can check this by using the structure of the event and monitor the activities of the mouse and the keyboard.

  I have change a simple VI to show this, please see the attachment.

  

  In the meantime, you can consult this example available on ni.com

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• How can I create a loop with delays in the series?

  Hi all

  So I wrote a Labview program to control both machines. Very simply, one is a source of tension, and the other is a Lock-In amplifier. What I want to do is change the applied voltage, wait a few seconds for the response of GARLIC to settle, then take a number of measures of GARLIC, then those on average and save to file.

  Here is a flowchart of what I mean:

  

  I did it for the most part, but I'm having a little trouble with the delay. VI file is huge, so I tried to make a simplified architecture that shows the basics of what I do:

  

  (The string and the constant matrix constants aren't actually what I use, it's just to illustrate, because I don't know how to make a quick easy space reserved for diagrams... is there an easy way?)

  So my assumption here (and it seems that it is happening) is that, for each iteration more outside of the loop, the first thing it does is start the countdown and start the change applied voltage/etc. at the same TIME, right?

  And then he only goes in the loop of measure LIA once she completed both of these tasks, right? (Please correct me if I'm wrong!)

  Then, how would make a delay after the loop of measure LIA? If what I've said so far is correct, then if I put a 'waiting' in the main loop, I don't think that it works (or at least not be very specific) because he would begin as soon as the iteration, would therefore be cash while GARLIC measured, and so do not wait the right amount of time after the loop LIA was finished (if I even put that it is long enough that it was still underway after This loop was completed).

  Am I correct in what I said?

  What is the smart way to do this?

  Thank you!

  You're right about the order data flow, which is usually the fall of most starting LabVIEW developers.

  To add a wait behind the inside loop, ask a node pending within a structure (the simplest being a structure flat sequence) and add some sort of data flow from the output of this loop to the structure of waiting. This will force this structure will not work until the loop ends.

  That being said, there is a better way to do this. Look in the Simple State Machine with LabVIEW 2012 and more recent architecture model.

  Edit: NIquist beat me to it.

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  The question you have posted will be well suited in the TechNet forum. Click on the link below.

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