Update of Variables between two loops

Hi all

I use LabView to work and did not have formal training in it, so I'm learning I'll. The problem I'm having is LabView won't let you pass variables from one loop to the other let say update the entry, my understanding is probably wrong. In the code shown below, I need to be able to update the entry for the cycle of use based on the measured laser power. This program is ideally year a CO2 laser for any desired power by adjusting the cycle until the electricity meter is +-1 watt of power you want to be. This duty cycle can be used as input into another program to run the laser at a specific energy. Currently on duty cycle block diagram will adjust but its not really the entrance of the device changes. This is my LabView knowledge to short.

Any ideas anyone?

Thank you!


Tags: NI Software

Similar Questions

  • Windows Update switches continually between two messages "checking for...» ' and ' check if... ". »

    Windows Update and Microsoft Update on Windows XP (runs under a virtual machine VMware) constantly alternate between "Checking for the latest version of Windows Update software" and "checking if your computer has the latest version of Windows Update software for use with the site. Mr. FixIt has not solved the problem. He worked for a long time until a recent download of the ActiveX Updater component. How can I fix it?

    So, the problem is no longer occurring after that I uninstalled and reinstalled Visual Studio 2010 Premium (due to a different problem). I don't know what happened here, but since it works now, I'm happy.

  • by the way the variable counter between the loops

    I have a question about the passage of a variable counter between different events / while loops and seen an increase in value regardless of the loop is initiated.

    The fundamental problem is that I write file names unique to data collected on a spectrometer, and I would value at the end of the name of the file to increment every time that I collect the data. There are several different ways that I can collect the data, and I'd like the counter to increment when the collections is triggered. The attachment shows essentially what I'm trying to accomplish. Represent it buttons collect two different types of data I collect my instrument, but the counter variable is not passed correctly between the two loops. Is it possible that I can get the incrementing counter so that the two loops read the same value of counter?

    Thanks for your help.

    MICAH

    I can't look at your code since I'm on a phone. But you should really only have / need a structure of the event in a vi. The only exception I can think of is one to manage the events of the user and the other for GUI events. But even in this case there is no reason that I can think to need two.

  • Synchronization between two periods loops FPGA

    First of all, I appreciate the forums here and have read a lot of interesting topics. This is the first time I can't solve it with research and I hope for your entry.

    Information:

    I'm using LabVIEW 2009 f3, PXI-1033 with the PXI-7813R.

    Problem:
    In my FPGA program, I have two loops, where you need to run as fast as possible (has) and the second just quickly (B). Has turns 20 MHz to 40 MHz and B . These are for the two loops limiting speeds. B cannot run faster and Has should not run more slowly.
    Loop has captures the sensory information and integrates data as many loops as indicated by the user. When completed, please send a trigger to B, which calculates the new position information and sends it to the machine. Only at certain times, B must achieve something and said nothing to the rest of the time.

    I thought of two ways, but doesn't work for me.

    (i) with the help of a Boolean trigger. As in a loop, the Boolean value of A can become true and switches to the next loop to false, B is not capture all the triggers and a 50% chance of getting the triggers and isn't perfectly synchronized.

    (II) using the occurrences. Sounds very interesting, but these are prohibited between the periods differently loops.

    I played with many scenarios, but may not understand proper. Someone at - it suggestions?

    This seems to be a fairly simple producer/consumer scenario.

    I would like to use a device worn FIFO to transfer data from the loop of producer (top) to the loop of consumer (bottom).

    Depending on how often the producer generates data (each cycle or every nth cycle?) the case around the write FIFO structure will allow him to write only when your requirements are met.

    The consumer loop reads the FIFO with a timeout of '0 '. When the FIFO is to expire, the consumer runs to the case which does nothing. When the FIFO does not expire, who processes the data and sends it to the side of Windows runs.

    In my example, I used 2 structures of cases to illustrate the two different modes. In your code, you must use a single structure of matter.

    There is no advantage to set a loop "sleep", even if no data exists on the FPGA. Because you are running in hardware and the non-profit CPU cycles these loops can operate simultaneously at no increase in the latency of a

  • Variable single process shared w/o (without) FIFO between deterministic loop.

    Hello

    Why we cannot use variable shared unique process without FIFO to communicate between deterministic loop?  In other words, why it is always recommended to use FIFO for communications between the deterministic loops?

    Thank you

    Ajay.

    It is called sharing resources.  When you use a variable shared unique process, only one thread accesses it at a time.  So what is happening is a tent to read, but B is busy writing on it.  So wait, adding a jig.

    With the RT FIFO active, you don't have this problem.  One can read from the FIFO as B adds another element.

  • How can I get an ampersand appears when, between two other letters, in a text variable?

    Using Indesign CC 2014, under Windows 7.

    Creating a catalog.

    The company name is used throughout.

    Given that this catalogue will be re-branded distributors randomly, the company name will change all the time.

    Here is a text variable that I am defining:

    T&T.PNG

    The problem is that when I try to use a commercial and (&) between two letters, no spaces, the ampersand disappears.

    On the good news front, it seems that sign works in the text without display in the preview...

  • change the same variable in different loops

    Hi all

    I use an event producer/consumer-controlled architecture where the two loops run processes acting on a common variable.

    To be more precise, I intend to change a flag photo in the loops of consumer and producer. That's why I need to share this variable between the two loops.

    I thought that the best way to do this is to use the indicator of functional photo as part of a Global Variable:
    1 / FGV initialization, which is a cluster that contains the indicator image

    2 / in two loops, the image indicator last value is extracted from the FGV using an action of 'read '.

    3 / the value of the indicator of picture is wired through different processes that would change partially or totally

    4 / Finally, in two loops the photo update flag values are wired as input to the FGV.

    Above is the ideal case, I expected to work. However, this does not work, and is what I've actually implemented:

    (a) in the loop of the producer, the indicator of picture is updated via a shift register, and at the same time, the new value is stored in the FGV

    (b) in the loop of consumption, the indicator of the image is retrieved from the FGV, and its present value is stored in the FGV (as in the ideal case)

    Then I don't why it does not work. I use other FGVs in my VI and which are modified by two loops, but THEY work...

    My VI is really great, so I can't take a picture of him. Can I give you a diet simplified what is my current architecture, whose shot at him. I hope it helps.

    Thank you.

    Florian

    Hi Florian.

    Two FGV reads on the left side of your curls below will be a problem unless you use the data flow to control. The FGV bed (as shown) will occur at the start and then after the structure of each loop ends. When you really want to 'read' when Gets an element from the queue or in the loop of photo - when there are new values.

    The loop of consumption is fairly easy to treat. Just run the Dequeue 'error' error 'in' on your FGV. This will ensure that playback of the FGV happens when you get a new item.

    The photo event loop is a bit tricky. You could send a user of the consumption loop event (after your FGV write) to the photo event loop. In this case the user loop photo, put a reading of the FGV. This ensures that you will get the changes made in the loop of the consumer. The only downside to this approach is that the photo loop always runs once when a change is made in the loop of the consumer. You can use a Boolean value to prevent the image to be written (ensures also the image is always written after the end of the event Structure).

    Here is an example:

    Steve

  • calculation of time between two time as timestamp

    How can calculate two hour, START as the timestamp TIME in the data type, END TIME as of time also.

    select END_TIME-START_TIME from PROG_DLY_WORK
    

    Result

    + 01:50:00.000000 000000000

    How can get exactly the time spent as 01:50 ? and these calculated time must sum (elapsed_time) in another column.

    oracle as PaaS cloud environment

    Product VERSION STATUS
    NLSRTL11.2.0.3.0Production
    Oracle Database 11g Enterprise Edition11.2.0.3.064 bit Production
    PL/SQL11.2.0.3.0Production
    AMT for Linux:11.2.0.3.0Production

    Time difference between two columns in hours

    Start

    FOR REC IN (SELECT START_TIME, END_TIME, CALC_TIME CAL_ID)

    LOOP

    UPDATE CALc_TIME

    SET ELAPSED_TIME = round (())

    TO_DATE (to_char (REC. End_time, 'ddmmyyyyhh24miss'),

    "ddmmyyyyhh24miss")-

    TO_DATE (to_char (REC. Start_time, 'ddmmyyyyhh24miss'),

    "ddmmyyyyhh24miss")

    () * 24).

    WHERE CAL_ID = REC. CAL_ID;

    END LOOP;

    end;

    Lag in minutes

    Start

    FOR REC IN (SELECT START_TIME, END_TIME, CALC_TIME CAL_ID)

    LOOP

    UPDATE CALc_TIME

    SET ELAPSED_TIME = round (())

    TO_DATE (to_char (REC. End_time, 'ddmmyyyyhh24miss'),

    "ddmmyyyyhh24miss")-

    TO_DATE (to_char (REC. Start_time, 'ddmmyyyyhh24miss'),

    "ddmmyyyyhh24miss")

    () * 24 * 60)

    WHERE CAL_ID = REC. CAL_ID;

    END LOOP;

    end;

  • Google maps 'directions' between two points stopped working in firefox

    When using google maps to find the route between two points "Get Directions", he will just stand here loading... never finish and showing the routes between locations.
    It used to work fine a month ago. I didn't expect the update to Firefox.

    I opened the Camino to test on this browser google maps and since I did open Camino in a month or so he asked upgraded but also verified 'Flash' and asked at this level because it was outdated. I have tried re google maps "get directions" between two points on Firefox after the Flash update and it worked!
    It is a pity that so much of the web is based on Flash. Yes its cool but its also a huge pain. I wanted to just quickly answer my own post in case others are having similar problems and simply update Flash.
    See you soon

  • Passing variables between LabVIEW and TestStand

    Hello

    I'm just learning how to use TestStand and although there are a multitude of resources available, I always find me at a loss on how to pass variables between TS and LV, leaving me to think that there is one fundamental thing that I'm missing which is likely, given that I have a weeks experience with LabVIEW and a days of experience with TestStand.

    I took a glance to the example of 'Clusters' to the Code Modules in TestStand examples (I use TS 2016 if it matters) because I thought it would be quite ideal for what I hope. In this case, I hope to be able to pass a string (a file path) to LabVIEW and VI power take this string and use it as part of an order for the Exec.VI system.  Then, I would be able to pass strings back to TestStand to show the user if an error occurred, but I thought I should get the first part of work.

    I guess my question is what do I have to wait to see in clusters to the example of the Modules of Code? The Watch window displays all defined variables premise on which has the ContainerOut in the Variables pane, but I don't see any kind of update on facades (VI1.vi and VI2.vi) LabVIEW code. Should I be?

    I looked at a few other discussions of the forum here and here, as well as the document of the basis of knowledge here, but could not recreate their solutions. It seems that the connector pane would be a viable way to go, but I'm not sure on how we create and use effectively. According to this document , it makes it seem like it should be simple enough to makes these terminals, but I am still missing a key step. I was able to follow all the steps on the knowledge base document and run the sequence, but then had no idea if it worked or not; I have the report show me the values of the variables I put, but I have no idea whether or not he actually did anything with the LabVIEW VI, or how I could see that.

    Please let me know if you need further information or clarifaction everything I ask.

    Thank you for your time,
    JColvin

    Digilent, a company of National Instruments

    If you want to enter values, you must create a vi for instance dialog box

    The OK button will allow new values to pass to the output terminals.

    A Cancel button will pass just the original through the output values without alteration. The VI will close when either the OK button or cancel were pressed.

    Concerning

    Ray

  • GPIB communication between two computers

    I try to communicate between two computers via GPIB. A computer to send an order, the other will receive, save and then respond accordingly. This response will then be received by the first computer and displays (this is the emulation of a device, the real need is to communicate with a satellite TT & C)

    I realized all of this. However, to be in listening mode I wired a property node with a timeout-infinity (1) before reading. Now I can't leave the VI as he is still stuck in playback until the receipt of an order.

    How can I get out of the VI when he's stuck in playback function.

    PS: Using GPIB for communication is a requiremnet of ht eproect and cannot be replaced.

    Hello

    You can have the timeout of read and then clear the error and keep looping until you get a message.  And then you can use arithmetic consisting of stop the loop if you click on the stop button, or get one error other than a timeout, or if playback returns data.

    If it works for you?  I joined your 'writing and then read.vi' with the added code.  Double check my logic, I'm sure it's just but not run it.  Also, if you return a large amount of data make sure that the time-out period is sufficient.

  • Delay between two operations in the same visa write buffer

    Hello

    I'm new to labview and have tried to find a way to introduce some delay in milliseconds between two operations in the same buffer of writing a block of single entry visa. Here's what I want it to be like:

    CURR: LEV 1.5

    wait about 50 ms

    CURR: LEV 2.0

    wait once again

    In fact, I must apply an alternating signal to a coil with a certain frequency through a source of supply of power e3631a Agilent. So if there is another alternative for her, so please let me know.

    Thank you

    Concerning

    Here are two approaches. First being the easiest, simply put a delay between written VISA. The second being a more robust because it allows you to develop a series of commands by simply adding the string array. You might forget the case of the loop if you don't mind the 50mS delay before e first command is sent.

  • OOP - how to pass variables between the branches of the object, but not instances of VI

    I have a main VI where a thread object goes through some subVIs initialization and then branches off into several parallel loops. My understanding is that each branch becomes a separate instance of the object. Data is passed between the loops using global variables, wrapped in the accessors (I can change this if someone has a better approach - reducing to a minimum the memory and the CPU usage is very important).

    I need to have a large number of instances of the main VI running at the same time. What would be the best way to ensure that the data transmitted between the loops of one instance of VI do not interfere with the data transmitted between the loops of another instance of VI?

    Thank you for your understanding.

    Ah, you're right. Stupid mistake on my part. It's all working now. The corrected code is attached.

  • Output graphics of two loops for

    I would like to see a graph of the output generated in both loops for.

    X: steps (i x I have two loops)

    Y: Y1 should graph the polar output

    Y2 should chart the Azimuthal output

    Probably very simple to resolve/upgrade in place.  (The output file works fine).

    Thank you

    Kevin

    Good work Kevin.

    I have some suggestions for you (I don't know what it will be eventually, because then maybe they're based):

    • If the data do not change over time, you can use a graphic instead of a graph; Whatever it is, reduce the necessary processing power by updating the two parcels only once for a full run of the outside loop (see below)
    • You have a lot of indicators that are not obviously necessary (they simply out what puts out control - off 4;) Stop 5; Polar; Azimuthal, etc.).  When you submit here, the code is more it is easy to understand and faster you get an answer (minimal document also helps understand us what all is for).
    • Use the decrement vi but don't take it off 1 (reduced the increase in code).
    • Avoid strain - explicitly cast I32 to double so that no appeal should be made to the Manager of memory running (will reduce your footprint of memory of codes).
    • Written file are intensive and bays of building CU generally allocate dynamically memory - try to avoid these as much as possible.  In your VI, you can write to the file once when all iterations are complete.  This will reduce the runtime of the VI.

    Anyway, there are a whole bunch of thoughts that you probably care to hear, but I hope they have been helpful.

    Cheers, Matt

  • How to give a delay between two Boolean?

    Hi all

    I want to insert a dalay in time between two Boolean values. My requirement is I want the second boolean to be switched on after delay 2 sec of variable Boolean 1 is turned on.

    How to do?

    Thank you

    Yes, I don't want to do antthing...

    Meanwhile, I also had the same idea...

    Thanks for the reply

Maybe you are looking for

  • G60-230US == > does not connect to the wireless network

    Greetings... I got my new laptop a G60-230US with Windows Vista Home Premium SP1 yesterday... I was so excited. I quickly put in place and the network manager. He finds my home network (a router we Robotics MaxG 5641), had the exceptional signal stre

  • Camera work is not on Windows 10

    Hi, after installing Windows 10 on some PCs, I have no access to the camera on them in Skype. If I open the camera app, it works and not exceeding not black comes from the camera when using Skype

  • Satellite L775-15 q - plan to charge the battery for long battery life

    Hello I just bought a Satellite L775-15 q and I want to know the best plan to charge my battery, so it can last as long as possible.Do I always leave the laptop plugged into the charger power cord, no matter if it has full battery or not? Should I al

  • DVD drive won't burn CDs?

    I can't copy of CD. I tried to copy an audio CD by using Windows Media Player 10 and Sonic Record now Toshiba, but at the same time produce an error towards the end of the combustion process.I reinstalled the driver DVD and reinstalled Windows Media

  • Pouvez Sansa e200 series play/sorting songs based on records

    As you know, when you play music, the songs are sorted by artists/albums/songs/genres, why not records? Sometimes I put some songs in one folder, like 'rap songs', 'songs of jazz', 'my pop music' etc. I don't want to edit all the info of ID1/2/3 song