reentrant run loop

Similar Questions

• pass-through of a Subvi to the next level with continuously running loops

  Hi all

  It is a very simple question, for some reason, data available as a Subvi indicator doesn't it up level vi. I think it might be something to do with the while loop I use, but I cannot understand, any help will be appreciated. I don't think I quite understand how data comes out of a loop constantly running.

  GPSdisplay runs a driver called GPS.vi (im not worried for my event structure immediately, which could be bad, but I am yet to test this bit yet) 1 probe should have the values of GPSCluster

  

  Loop in GPS.vi. GPSCluster (sensor 2) is updated correctly

  

  I can't work on why the data is not passed to GPSCluster at the top of page vi

  

  Hi bennymacca,

  I think that you are on the right track with a FGV. You can do quite easily with GPS vi you have.

  Before going further, your GPS while loop will return only the last reading and because the Boolean value of "Read" output state is set to FALSE, it will not stop. You see it out at all? The logic, I read, once entering this while loop, that he will not stop until said.

  There are 3 options you can try.

  (1) use a FGV, because you are looking in. To do this, you need to change the boolean TRUE State and set records in the GPSCluster - to analyze the information around, holding each time the vi is called and you leave. Outside the while loop you will thread to the top of the cluster to the indicator that you want to collect (OR you can have it inside the case statement where you read - be careful here, if).

  (2) in the main code, above the frame of the sequence, you can place the GPS vi while loop (the ' read' a), given the State of the boolean connected to a local variable of the Stop button. This while loop will start depending on how feels LV, wire, one line error for the two while loop and Frame (indicating that the two are to run in a parallel mode), OR you can put it in a case statement and say 'go' when you want to start playback. In this while loop, you can then copy the data to read directly in your variable Cluster that it is generated.

  But with (2), you move yourself away from the purpose of the GPS vi, which would be to bring all the features of the GPS functionality in a vi - which is a good idea.

  (3) put a condition on the State of the Boolean case "Read" statement - just make it TRUE when you want to stop reading the data (do you have a time or a condition, you can check here?). Even by doing this, you would / may still need to shift on your lease registers loop to keep the data for each iteration.

  I hope that all of this help. See you soon. David.

• Two different running loops one after another with different time intervals

  Hello

  I am currently using LabVIEW 2013. I'm new to LabVIEW.

  I take 10 values to data acquisition during the 9-10 sec time interval within a period of 10 seconds.

  I thought runs two loops. 1st loop will run for 9seconds out giving zero and the second loop will launch with 1 second left taking all the required 10 values. can someone help me in this way to do it. If you can suggest me any other idea.

  Thank you.

  Your task of data acquisition is to take 10 samples in 1 second (I assume that you also spaced).  10 samples/s = sampling frequency of 10 Hz (Hz = events/second).  To configure DAQmx tasks, MAX is your friend.  Open MAX, find your device (plugged in), open a panel of Test and find a way to let him taste at 10 Hz and collect 10 samples.  Test to see if it works.  Get it now to save as task.

  Now, when you configure your block diagram, drop a DAQmx Start Task (or even read DAQ) and wire an empty constant to the task in.  See the little arrow for menu drop-down?  If you click on it, one of the choices should be the task DAQ, you just saved.  Select that and it will work.

  Now, all you have to do is wait 9 seconds before acquiriing your 10 points.  There are functions of synchronization that can allow you to do this.

  Bob Schor

• Always the debt running loop

  I'm already creates 2 view using the union to the union the transaction
  1 find the Transaction (view for Union all the debet kredit n transaction)
  2. view LAST_SALDO (view to find last client debt of client)
  
  I have a problem when I question him looking for debt running...
  
  Query is like this:
  
  SELECT T.TRX_DATE,
  T.NUMBER_TRANSCTION,
  T.DEBT,
  T.CREDIT,
  T.Saldo,-LAST_DEBT <: P_DATEFROM
  (T.Saldo + debt) - credit AS RUNNING_DEBT.
  T.CUST_ID,
  T.CUST
  Transaction t - Union all the debet kredit n transaction
  LAST_SALDO S - see to find the last customer customer debt
  WHERE T.CUST = S.CUSTOMER
  AND T.CUST =: P_CUSTOMER
  AND TRUNC (T.TRX_DATE), BETWEEN: P_DATEFROM AND: P_DATETO
  AND TRUNC (T.TRX_DATE), <: P_DATEFROM
  
  FORMULA FOR RUNNING_DEBT HAS BEEN
  RUNNING_DEBT: = T.Saldo + DEBT - CREDIT...
  
  But each time I was questioning the result like this;
  
  TRX_DATE NUM_TRANS DEBT CREDIT LAST_DEBT Running_DEBT CUST_ID CUST
  05/08/2009 0000063 10 2.6335 0 12,6335 12 X
  06/08/2009 10000043 1.725 2.6335 0 4,3585 12 X
  06/08/2009 10000044 2,415 0 2.6335 5,0485 12 X
  06/08/2009 10000045 3.105 2.6335 0 5,7385 12 X
  06/08/2009 10000046 1.035 2.6335 0 3,6685 12 X
  
  Chicken n ° 1 Transaction
  Debt running value is VALID
  RUNNING_DEBT = LAST_DEBT + DEBT - CREDIT
  = 2.6335 + 10 - 0
  = 12.6335
  
  But when the Transcation No.2 he became disabled
  THE VALIDITY IS
  RUNNING_DEBT = LAST_DEBT + DEBT - CREDIT
  = 12.6335 + 1, 725-0
  = 14.3585
  
  But the result still loop as this formula
  RUNNING_DEBT = LAST_DEBT + DEBT - CREDIT
  = 12.6335 + 0 - 10
  = 2.6335 + DEBT - CREDIT
  = 2.6335 + 1, 725-0
  = 4.3585
  
  Sory if the question is amateur...
  Thank you very much...
  Kind regards
  
  
  
  HA

  LAG Analytic function can be used to get the value of the previous row. If that's what you're looking for

• Cannot run loop while exec from running in test system

  Hello

  Someone can tell me why the attached VI works when you run it on its own but is not when you put it in the testbed.

  I currently have Labview 8.5 and Testbed 4.1.

  When I run the VI Labveiw, I don't have to shut down windows media player exe in order to make the progress bar run, but as soon as I place the VI in testbed (hand) and run from there, the progress bar stops at zero until I close the media player exe

  I'm confused...

  Thank you

  Chris

  Hey Chris,

  Take a look at this KB, he explains the problem and how to fix.

  I also ask if you use the media player just example exe, or if you call the player in your application?

  If it is the case that I recommend to an ActiveX interface for media player because this will give you much more control.

  Let me know how you go.

  Kind regards

  John

• Adobe Application Manager warns product will stop working in otherwise, signed at but runs loop after clicking the "Sign In" button

  Bought recently an educational Version of CS6 Design and Web Premium and installed on a Mac. After the installation and the seizure of the serial numbers, I launched Illustrator and PhotoShop. Adobe Application Manager came warning me that if I don't connect with an Adobe ID and register the product, the product does not work within 7 days. That was 2 days ago. When I click on 'Sign In', however just in a cycle of loading as in attached photo. Any advice?

  

  Log, activation, or connection errors. CS5.5 and later, Acrobat DC

  Mylenium

• VI is paused and while loop has highlighted

  I'm in parallel while loops and for some reason when it should start to run loops, it pauses for the VI and highlights one loops. It was not last week when I ran it so I don't know what is the issue. I've included a screenshot of the beginning of the code, the loop that is highlighted is the down right. Also, what is the red dot on the wire in error right after the structure of sequence?

  Thank you

  lvuser333 wrote:

  I'm in parallel while loops and for some reason when it should start to run loops, it pauses for the VI and highlights one loops. It was not last week when I ran it so I don't know what is the issue. I've included a screenshot of the beginning of the code, the loop that is highlighted is the down right. Also, what is the red dot on the wire in error right after the structure of sequence?

  Thank you

  Someone snuck into a breakpoint on you.  The red dot is the stopping point, and that's why your VI made a break.

• Ridge SVFA and the Relative Phase amplitude must be reentrant

  I think I found an obscure problem with one of the "Baseband FFT" s VI on the 'Frequency analysis' subpalette of the Sound and Vibration Measurement Suite. "

  The "Peak Amplitude and Relative Phase SVFA" is set to no reentrant run, but I think it must be defined on preallouee clone running reentrant.  All the other "Baseband FFT" Vi on the 'Analysis of the frequencies' subpalette are implemented reentrant preallouee clone.  This is crucial, because if you use multiple instances of the same VI on a block diagram and feed each instance of another set of entries of waveforms, each instance must maintain its own internal state FYI channel, sampling rate, on average, etc.

  I just found out the hard way after a lot of debugging this including VI has been implemented not reentrant.  On average maintained automatically delivered to zero with warning 1908.  Of course, I had two instances in my diagram, each receiver signals a different set of channels.  Because the VI is not reentrant, he was running an instance with a set of inputs of waveform, then execution of the other instance with a different waveform entries together, then in back and automatically reset on average to each time because the channels kept alternating.

  Don't I have that right?

  Jeremy,

  Looks like our test coverage can use some improvements. You're absolutely right - this VI was to have been put to preallouee clone environment. EI which was originally filed repsonded CAR # 570225 to our development team and it's been fixed for the next version of the software Sound and Vibration.

  Each new version, we write one articulates KnowledgeBase documenting these fixes, for example: the list of fixed bug in 2015.

  Keep an eye on fixed bug list for the next version and this CAR ID to appear in this topic.

• Code Golf: stop two while loops with guaranteed ratio iteration

  Proposal

  In the vein of the tradition of Perl, I would like to see if there is any interest to solve a few puzzles programming in LabVIEW. Can someone post a problem and define the rules to solve.

  Here's a question for beginning/intermediate to sharpen your "palette".

  Description

  With a user action, how you would stop two while loops such as the relationship between iterations is the still the same? Concrete to view this situation is to take action: both instruments use the same source of synchronization to take measures, but second divides the clock down so that it is a little slower than the first whole factor. For example, if the slower instrument is four times slower, then at the end of the VI, the slower instrument takes 100 measures the fastest instrument took 400.

  Rules

  • You can use vi.lib
  • You cannot include any other subVIs
  • Your solution should pass for loop1 interval as low as 25 ms

  Model (joint in LabVIEW 2009)
  

   

  If people are interested in this, then we will find a way to improve future problems. Please post your suggestions and criticisms, but only if you also post a presentation ;-)

  MacNorth wrote:

  [..]

  If we choose the first suggestions, the VI has yet to recover the data at different speeds. You can dedicate a loop for each instrument to disassociate a jitter and latency introduced by their connectivity or the inner workings. This adds a margin of safety when there is a conflict of thread and the pilot. You can also implement a simple counting as altenbach loop and renounce the multiloop complexity.
  [..]

  It is a very good point. But I wanted to make sure, you should / need to discuss the benefits, but also the disadvantages of the design. Implementation of an application is most often a process of 'special cases '. If a framework/design for a single application model does not necessarily correspond to another application.

  Designs are always strongly according to the requirements and constraints. What gives here designs will result in educational services, of course, but not necessarily as reference models for specific applications.

  Advantage of simple loop:

  • No synchronization between several loops required
  • Can easily implement any whole factor between services (quotent & function remains for a case structure

  Disadvantage of simple loop:

  • Take advantage of the multi core systems (at least not much)
  • Can easily run out of the time constraints (material not "not responding" enough, fast manipulation of data takes too long,...)
  • Code will accumulate within the structures of the case, where the readability could suff

  The advantage of multiple loops:

  • See essentially the disadvantages of single loop (several loops solve those)

  Disadvantage of multiple loops:

  • More complex, especially for the sync switch (not beginner friendly, requires a more/better design)
  • May contain easily questions source such as race conditions and locks

  A little side note:

  Even if the equipment works different acquisition rate, this does not necessarily that the software must use different rates for data extraction. You can use the same model of an hour, but get X times more values for the task faster than the slower running. The 'only' thing to care of are the sizes of buffers and bottlenecks in the data transfer.

  MacNorth wrote:

  [..] The best advice published OR shutter multiple while loops (https://www.google.com/search?q=labview+stop+multiple+while+loops) are laughable (and the 'solution' in my model). [..]

  No, it's not laughable. For many applications, this approach to shutter at the same time several loops running is OK. The constraint: only for simple parallel running loops.

  More complex loops (producer/consumer and similar) with the more complex data relationship ships require more valiant approaches such as queues, declaring events or user.

  My 5 cents only,

  Norbert

• I can't connect my hotmail account. I tried to contact hotmail but I ran across a loop hole

  I tried to contact hotmail months now but I'm running loop holes and fortunately I got this site. I can't go to my hotmail account, it says: I signed in too many times or I signed to use thanks to an organization. could you please help me. I changed my password using my yahoo account, but still its not allowing me to sign in. I think its blocked because of spammers. my account is * address email is removed from the privacy * that I can not connect to and is my 2nd account * address email is removed from the privacy *. I changed my password using my yahoo account.

  Hello

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• Loops rule in the clouds of the OPA

  Hi OPA developers,.

  We currently use the OPA Cloud (may 2015) for the requirements on annual sales.  Unfortunately found an error of loop rule to requirements such as:

  * an e balance at beginning of the yearmust be equal to its previous year-end balance less pension his previous year of

  * but a balance end of year is equal to balance at the beginning of the year more value temp of the year

  The year is an entity.  Balance of year and end of year sale run loop in a debugger because even if we refer to the previous year, he always uses the same entity instance attribute.  Loop rule is not supported in the cloud (as opposed to how we can configure the properties of the rule in the version on site).

  Please let know us if you have a work around to do this.  The only alternative we have is to turn them into global attributes and enter the number of the year in the name, such as the balance of the year 2nd = 1st year sale - 1 year temp value, balance of 3 year = 2nd year balance - 2nd year temp value, etc.  But then, it is instances of entity year 100 x each attribute start and end loop so it will be a very large document/s for us to create and to business users to maintain.

  If all goes well there is something we can use entity and relationship functions... but always try to figure out how to do.  Any help is very appreciated!

  Thank you!

  Unfortunately there is no support for rule lines in the version of may 2015.  We are looking for by adding back to a later version.

  I'm guessing that your example is simplified, but you wrote it you don't need a loop of rule to solve.  The final value is just:

  InstanceSum (years, value temp of the year) - InstanceSum (the years, pension year of)

• PHP / MySQL - printing a Variable in a Table cell for a while in a loop

  Hello
  
  The attached code works very well. When running loop a while, in an HTML table, it prints the value of 'votes_up' of a MySQL database for each "$row2".
  
  However, in a HTML table cell, I would like to print "votes_up" less any other value, called "votes_down." I imagine that the first step would be to create a variable equal to "votes_up" under "votes_down". But I do not know how to print this new variable for each "$row2" in the MySQL database. How can I do this?
  
  Thanks in advance,
  
  John

  .oO (ArizonaJohn)

  > The attached code works very well. In an HTML table, it prints "votes_up".
  > value of a database MySQL for each "$row2" generated by a 'while' loop
  >
  > However, in a HTML table cell, I would print "votes_up" less another
  > value called "votes_down" I guess the first step would be to create a
  > variable equal to "votes_up" under "votes_down". But I don't know how to print
  > this new variable for each "$row2" in the MySQL database. How can I do this?
  >
  > Thanks in advance,.
  >
  > John
  >
  "> print"". $row2 ['votes_up']."";

  $votes_diff = $row2 ["votes_up"] - $row2 ["votes_down"];
  print '.$votes_diff";

  or

  print '.". ($row2 ['votes_up']-$row2 ['votes_down']). »";

  HTH
  Micha

• Window front jumping up and down (LabView 2010 SP 1)

  I have a bug problem with dynamically opening and running a VI.

  The VI below is compiled into a DLL:

  

  With that, I opened a secondary VI to display the results. That VI is called multiple times in a loop. It works fine, but I was annoyed by the flashing of the menu bar and the toolbar. That's why I added the 'FP. ShowMenuBar' and 'to. Visible' to hide those. This causes the Panel window before jumping up and down on my screen. Is this a known bug (I presume it is) and is there a work around?

  One other minor annoyance is that open the front panel, close it and then open it again cause the façade to be open in the background, and I have to manually move it to the foreground. I thought it might be remedied by adding "FP. IsFrontmost', but it does nothing.

  OK, I did the VI reentrant and added the option "prepared for reentrant run" in the box "open VI Reference. This is the VI opened as a clone and stop the blinking of the menu and toolbar.

  As a bonus, the CPU dropped load. (But I do not see why).

  The façade positioning mind again, but did not understand.

• Application Builder: the Application closes after the Launcher

  I'm launching my application executable that was built with the Application Builder. I use framework actor and have a Launcher.vi which is defined as the start VI and launched the actor parent. When I run the executable, I can see the front Launcher.vi opens and closes quickly, but the main façade never opens. Where should I start to debug my executable? Is there something obvious that I do not forget to do? I compared my configuration of the application to the actor framework example (that does not produce an executable work) and can not find something that is different.

  OK, I thought about it. I went back and watched closer launcher for the example of master actor and I noticed the block launch actor VI didn't have "Open front actor Core" value true which seemed strange because the front opens correctly for this application. I searched in VI properties for the parent of project example actor Core.vi and saw that the appearance of the window has a custom configuration. The options to see the façade when called and then close while initially closed have been verified in the sample project but unchecked for my project. I also watched the run settings and saw that the example is configured to reentrant run clone Shared while my project is configured to run not reentrant.

  Changing the appearance of window correctly launching my main façade. I played with the run settings to see what those and noticed that when my VI is configured to not reentrant run, child actors do not seem to get started. In addition, the stop on my front button will close the front panel, but the application is still running. Change the mode to Shared clone lance child actors correctly and completely closes the application when you press the stop button. I also tried clone reentrancy pre-allocated to see what would happen. errors of launcher just immediately say the call by reference VI is not executable.

  I guess it makes sense. Framework of the actor expects that the State is not maintained when a player is destroyed, so shared clone ensures that each instance of a child actor has its own pool of memory to be erased when the player is stopped. http://zone.NI.com/reference/en-XX/help/371361J-01/lvconcepts/reentrancy/

• Order of execution model

  The States VS 2011 helps:

  ************************************

  
  

  Strap of model execution

  
  

  Each model run loop running a compiled template for. The number of loops execution model is determined by the number of models specified in system definition file. By iteration, the loop of each model is run performs the following tasks:

  • Reads the data sent by the primary control loop and maps those data to the inputs of the model.
  
  
  • Performs a single step of the model.
  
  
  • Reads the values of model output and sends this data to the primary control loop.

  **************************************

  Suppose that:

  • I have 3 models such as the output of each model is directed towards the entrance of the next model: model 1 model 2 > model 3
  
  
  • with channels correspondents mapping such as:
  
  

  Model1_output <---->Model2_input

  Model2_output <---->Model3_input

  • The order of execution is set to "parallel."
  
  
  • Decimation of model is set to 1 for all three.

  The three models will run within the same tick PCL "in parallel" in the context of loop PCL, while running in series in the time slot of ticks because of the way the channel map is defined?

  THX.

  L.

  Lol stream mapping does not determine the order of execution.  In parallel mode, the three models receive identical entries of the PCL.  These entries are based on the previous iteration of the system.  The outputs of the model of the iteration (N-1) update the PCL at the beginning of the iteration (N), and these updates are available as inputs of the model during the iteration (N).

  In your case:

  Check 1

  Write A for model 1, model 1 run and written was ' to PCL

  Tick 2

  Model 2 Gets A' starting from PCL, runs and writes A "to PCL

  Tick 3

  Model 3 Gets A "PCL, performs and writes A" ' to PCL

  If this is not desirable, you should put the standard models of the category of the order of execution under the Simulation models in System Explorer.  This makes the outputs of the model available on other models in the same iteration of the PCL.  Note, there is no output model available for the rest of the system until the next iteration of the PCL.

  

  Steve K