Access to local variables in the sequence

Similar Questions

• Is there a way to get refnum one control from a local variable or the wire?

  I'm looking for a way to get the refnum of the element of a façade of a local variable or the wire. Is this possible?

  Is there a way to accomplish the following?  (These are published images, this is currently impossible in LV)

  

  or maybe

  

  If this kind of thing is not possible, is there a reason for this? If there is no reason why it is impossible, I'll put it on the boards of the suggestion.

  Why do you need this?

  A thread is simply data. It is not associated with a control.

  Similarly, a local variable is a way to access the data in a control, for not interacting with the control itself.

  Is the control of the right-click and selecting Create > reference not good enough for you?

  You can write code to get the reference to the controls connected to the cable and the the control whose desired local variable, but I feel that this is not really what you want.

• How to access settings/local/variables, who went through referenece?

  Hello

  I am new to NOR teststand.

  A single sequence file (file1.seq), I called another file of sequence (file2.seq), which I spent the value of parameter by reference (Locals.Driver)

  Parameter is Local that contains string variables.

  In File2, I want to replace the value of Locals.Driver.

  But I'm not able to access past variable reference (Locals.Driver) in File2.

  Please tell me how to use this variable in File2.

  Settings are accessible using "Parameters.variable".  If you pass by reference, you just put this setting and it will update the local section that allows you to call the sequence when the sequence is complete.

• Why flatten data chain not getting past all about TestStand via a local variable of the string?

  I tried to go around a series of data in TestStand as a string using "flattened chain" of LabVIEW. When I create a local variable in TestStand of type 'string' and try to write the cluster flattened at this that he simply not transmitted. If I convert the string flat binary table and then pass it around, I can recover all the data very well.

  Is there something I'm missing here?

  I've attached an example Teststand sequence that illustrates this problem. If you run this sequence that the 1st test will fail, which is the attempt to simply pass the flattened string data structure and the 2nd test will pass as it is the binary table that I generated from the flattened string.

  Thank you

  Pete

  crossrulz is correct.  The Null character affects how TestStand handles the string.  You will need to specify the string to a binary string in the list of settings both the VI.  TestStand then encodes the stringso it can prevent the loss of data.

  If you need work on the binary string in TestStand, you will need to convert it to an array of raw data with PropertyObject.GetValBinary.

  

• LabVIEW: Concerns with local Variables and the readability of the program

  Hello everyone. I was hired for the summer to work at my University to a new laboratory. All right, but I have some problems with my main VI. I am a new user of labview coming from a C++ background. I went through several iterations of adding features, fixing bugs and doing my readable program. Before the last "cleaning" my program was so big that I couldn't see it all at once on my screen. My goal was to solve this problem. My solution contained three parts: use a state machine show parts of my code at the same time, to remove the son as much as possible, and use structures element to position my code manually.

  I met since problems write other programs that brought me here, and I saw a series of messages condemning the new programmers for their use of local variables instead of cables. I do not know my use of structures element as fancy boxes I can exclude the automatic cleaning is also a terrible practice.

  After doing some more reasearch on the subject I see local variables to add the duplicate in memory entries and their suppression can significantly speed up execution time. I have a delay programmed in a part of my code, but the rest can run as fast as he can as far as I'm concerned.

  I have attached my main program. Looking at it I think I did a good job to make it readable. But I'm not a user expert labVIEW.

  How to balance (do not use local variables, these structures element, etc.) efficiency and readability. Before you make these changes, there was so many things and so many threads all over the place that I couldn't even tell what was going on, and even less my teacher. I really wish I could see my entire program without scrolling on this computer of the laboratory (resolution 1280 x 1024).

  Advice on how I can achieve the efficiency, simplicity and common readability would be greatly appreciated. I feel I've done the latter while sacrificing the first two. Ultimately the three should probably be equally important.

  Thank you.

  Nukem

  LabVIEW 2010

  

  As said altenbach, attach your event structures.  It should really be only need structure of an event, especially for a simple VI like that (I counted 3).  This is the second time I have recommended this today, but fetch JKI State Machine.  I use as the basis for most of my interfaces.

  Here's a way to manage the break with JKI.

  

  

  

• using local variables in the help of calc

  Hello
  
  I am trying to use local variables in a calc by declaring two variables and then referencing these two variables to do some math. However, I get an error: error: invalid member name 1012004 [Cumulative_Biscuits]
  
  Anyone know why it gives this error? I'm he declare incorrectly? Here is my code.
  
  
  
  
  
  ESS_LOCALE English_UnitedStates.Latin1@Binary
  
  UPDATECALC OFF SET;
  SET AGGMISSG
  SET CACHE HIGH;
  SET CREATENONMISSINGBLK
  
  
  var Cumulative_Biscuits, Average_Biscuits;
  
  Difficulty ("New York", "Cola", "Budget", & CurrYr, & CurrMonth)
  
  / * Calculate the Cumulative cookies for 24 months * /.
  Cumulative_Biscuits =
  
  @Sumrange ('cookies'-> 'Real', @XRANGE (PriorYr02-> PriorMonth02, & PriorYr02-> Dec)) +.
  @Sumrange ('cookies'-> 'Real', @XRANGE (PriorYr01-> Jan & PriorYr01-> Dec)) +.
  @Sumrange ('cookies'-> 'Real', @XRANGE (CurrYr-> Jan & CurrYr-> PriorMonth));
  
  / * Now calc average 24 previous months * /.
  Average_Biscuits = Cumulative_Biscuits / 24;
  
  ENDFIX
  
  / * Now to spread the calculated average above for the next 20 months in the current scenario * /.
  
  
  Difficulty ('New York', 'Cola', 'Budget')
  / * End of month will always be Dec here * /.
  Fix (& CurrYr, & CurrMonth:Dec)
  
  "Cookies" = Average_Biscuits-> & CurrMonth;
  
  Endfix
  / * Month will always be Jan to Dec here * /.
  Fix (& NextYr, Jan: Dec)
  
  "Cookies" = Average_Biscuits-> & CurrYr-> & CurrMonth;
  
  Endfix
  / * Beginning of month will always be Jan here * /.
  Difficulty (& NextYr02, Jan: & NextMonth02)
  
  "Cookies" = Average_Biscuits-> & CurrYr-> & CurrMonth;
  
  Endfix
  
  Endfix

  Maybe this will help you too:- Re: calculation with temporary variables does not work

  See you soon

  John
  http://John-Goodwin.blogspot.com/

• Access can be set to a local variable

  Hello

  In a sequence, I want to access a local variable of the 'container' type, but the container element must be defined programmatically from another variable (an element in a table). Basically, it would look like this:

  For each Locals.TestList / / TestList is a table of 9 channels, current item is stored in Locals.CurrentTest.

  Locals.TempVariable = Locals.ResultList. / / Locals.ResultList is a container of

  End                                                                                                        // strings. Each string variable name is the same as the elements in TestList

  Is this possible?  What is the syntax for the "", so that TestStand include variable structure?

  Thank you

  Benoit

  Hello

  Locals.TempVariable = evaluate ("Locals.ResultList" + Locals.TestList [Locals.CurrentTest])

  Who could do if I understand your needs. The evaluation parameter must be a string, so if you pass the search string for your container, Evaluate will return the content of this place that is Locals.ResultList.

  Concerning

  Ray Farmer

• Code to skip the steps: initialization of local variables failed

  Hi all

  I'm upgrading some software LabVIEW RT I inherited LabVIEW 2011 to 2015 LabVIEW (32-bit) on a host Windows 7 Professional PC. The target is an SMU-8135. The software ran well when it is compiled under LabVIEW 2011.

  I modified the code to enable the monitoring of what is happening by looking at screen on the target outputs. The initial error that brought me here is that a local cluster variable initialized in the first window of the flat sequence described below have been appearing as the in windows later.

  The code begins with the initialization of local variables in the first window of a flat sequence and provides a quick line of text output to the display of the target (call this text #1) (using RT Debug String.vi) I send two lines of text so that a new row is created and later text does not replace it. . It then writes to the next window in the sequence flat screen two groups of text output to the target. Second text in the window 2 (#3 text) output is equipped with a wire entry from the error from the first text output in the second window (text #2). That is the second exit must wait for the first exit to complete before being sent to the screen.

  I see now some weird symptoms:

  1. when I connect to the target under a remote debugging session I see expected display outputs. Not remotely connected, text #2 is displayed. The code passes to the third window in the flat sequence, so everything in the two window should have executed.

  2. the text #1 appears on the target screen * before * I get the message "Welcome to LabVIEW Real-time 15.0." Is this normal? Whence this message? I searched my screws and subvis to this text and it is not there then it mucst come LabVIEW screws somehow.

  This all started with local variables no initialization in the first window, so apparently, I have a problem of data flow. Given that the problem disappears under the remote debugging, I'm a bit of a loss.

  Thanks in advance for any help,

  Eamonn McKernan

  EamonnMcKernan wrote:

  Text 2 appears only when remotely connected it does not appear when running at startup.

  Your "text 2" seems to be powered by a collection of nodes comments to "initialize on compile or load.  This will return once the empty string the first and therefore should not be display nothing until the code I run a second time.  That is the crux of feedback for?

• By the way the local variable to a default module

  I use LV 8.6 and TS 4.1.

  I made a custom step Type where I specified a default Module to run and I created a substep VI Edit that the user can move the entry to the default maodule.

  If I pass a value it is working properly. So, I want to pass a local variable, so I have a button in the edict Vi, which displays the property browser dialog box I get the name of the selected local variable. How can I pass the local variable to the default input module? (The value of the local variable is installed during the execution of the sequence).

  Thank you.

  Max.

  Hello

  Yes, I see what your problem is.

  If I am proving a means of suppling a variable as a fixed value or a search string then in my step type I organize the property as a container that contains two properties, one to hold the value and one the search string.

  If you don't have what it takes to change your step types, then you must indicate another to contain this search string, IE a local / fileglobal / global station. Or store it in the memory of your labview. None of them are ideal, as it is best to keep the properties of the step in the step.

  Concerning

  Ray Farmer

• pure example to compare the performance of reading for a local variable, a declarant and a queue element (looking for)

  Dear users,

  I came across an example of the operation and the disadvantages of using a local variable, a declarant and a queue for the collection and handling of data these last time. But I can't find him.

  I try to describe what and I hope someone can give me a hint:

  A sinus values were generated periodically and were sent to an indicator, a declarant and a queue. In the other loops, the local variable (of the indicator), the authors of notifications and of the elements of the queue were plotted graphs. Time of the playback loop loops can be set separately for each of them and depends on the sync settings (time: equal to the generator, half of the generator and copy of the generator), we can observe omitted elements or duplicate. Very useful to observe the behavior of loops in a local variable, a declarant and a part of the reading queue.

  Does anyone have an idea where this VI is placed, please?

  Hello ghighuphu,

  Do you mean this example?

  With the help of local Variables, queues and notifiers to synchronize data with parallel loops.

  http://www.NI.com/example/28717/en/

  Best regards

  Maha

• Image from the camera as local variable

  Hey,.

  I'm looking to use the same image reference for each of my camera inspections. I take a picture at the beginning of my test that I call this camera image1, then I have several inspections test, however, my camera1 image is empty for the 5 first steps but displays a picture of 3 steps then gives a blank image in the end I created a local variable of the reference image. Any useful suggestions. Thank you.

  Damien

  Hey,.

  Thank you for the interest that I have resolved the problem, reson why the image doesn't seem to my wizard output vision express VI was because I never restored the original image. Thanks again.

  Damien

• FOR loop does not update the local Variable

  I am newer to labview, and I can't wrap the head around why not a habit of local variable to update in the code if it updates on the dashboard. Anything im missing?

  Assume that you are talking about the local variable of the 'State of the cell. The terminal updates every 500ms in the small top loop, the local variable indicates simply that the indicator and thus updates also.

  The problem is "dataflow" and you need to familiarize yourself with the concept!

  Once the while loop starts, the local variable is reading and inside the loop begins. Most likely, the local variable is read before it is updated in the small loop, so most likely returns the value of a fade on the first iteration of the while loop. Now the small loop continues to go twice per second for about five seconds. Only after the loop FOR (and everything else inside the while loop) completed, the while loop will go to the next iteration, date on which the local variable is read once more, this time with the last value of the last for loop iteration of the previous iteration of the while loop.

  In summary, the local variable updates very well, it's just that the code does not read the new value around most of the time.

  Your VI is full also potential competition conditions caused by the over-use of the local variable. You need to respect the proper execution order by eliminating local variables.

  So what is the solution? Hard to say without knowing what the VI is supposed to do. Most likely, you will need to remove the inside OF the loop and use it outside while loop for everything.

• Write to the faster local variable in 2010?

  I remember a demo of LabVIEW classes which compared to the speed of writing directly to an indicator compared to a local variable and the property node.

  I thought that writing to a local variable has been very slow compared to writing to a terminal. There is no difference that I see with 2010. Maybe I'm not remembering correctly but I know that the gurus OR did a lot of performance optimizations.

  I have more 2009. A person of 2009 or an earlier version can tell me what's the difference in speed between writing to a terminal in the attached vi vs local?

  OR put in place a dorr back to allow the local update quickly. Not as fast as the terminal but fast.

  The draw on the spell-back cmoes in force when you have multiple.

  If you have a large table, you update (big table will make it easier to reference) and there are 20 places that read through local, then the dat should be copied in other residents.

  Ben

• How to create a nested local variable control custom?

  I inherited code which has a cluster of CTL control nested inside another group of control CTL.  If I drag the control nested outside the border of the other, I can right-click to create a local variable, I need to connect to the bundle name.  However, as soon as I drag the inside the limits of external control, it breaks the local variable.

  How can I create a local variable in a cluster THAT CTL nested in a second group CTL?

  Is there some kind of reference OuterCluster.InnerCluster, that I can use if I do a local variable of the external group?

  It turns that I need a local variable for the cluster internal.

  JPG attached shows that I created a local variable for the external cluster (ParametersCluster), used a Unbundle based on the name to access cluster internal (EmptyParmeters) and can access one of the elements through an another Unbundle by name.

• How to set multiple values clustered with local variable?

  Hi all

  Okay, I made my way through Labview for everyone and have some basic concepts down. I can see with a cluster, if acting directly on it, you can ungroup, change values, rebundle, etc..

  I try something a little more complex... and just do not know how to start on this.

  I have a menu menu ring set. I created this with a typedef, with 4 values.  I used this typedef 7 times, more a few LED bool, in a cluster. I made this cluster a typedef.

  Therefore, in my main vi, I started designing, I put an example posted here... and inside, I have two instantiations of the typedef cluster commands selection of left and right.

  I dropped in this vi, a copy of the menu ring typedef (same typedef as in clusters, values) called reset all tubes.

  Now, I am trying to understand how, with an event to change the value to 'reset all the tubes'... that I can start with the left switch and change all tubes (here is the menu ring selector) to the same value as what has been selected with the ring of menu 'Reset all the tubes'.

  I created a local variable for the selector on the left. It is configured to read values. (I'll be doing the same thing with the right too, but just to start with the left).

  In the examples I've seen where access to a cluster, you could ungroup the cluster... browse and change the values... maybe pull out all the "hits" in a table and go through to update the values.  And when you group or ungroup the bunch... you can see the values, etc., when you stretch on the block diagram.

  With the local variable... I do not see to 'stretch' it as I expected... so I can access the values "tubes"... and all at the value of the 'reset all the tubes' ring menu value.

  Someone can put me on the path on the best way to do... or is it a component structure I'm missing here?  Am that I on the right track everything first here?

  It seems pretty basic to me, but miss me just something here on the way to start...

  Thank you in advance,

  Cayenne

  You can't do this with a for loop of how the Department is structured, but why make it so complicated?  Just group the new value in the cluster, as shown below:

  

  If you do not want to use a loop for example, consider the restructuring of your cluster.  Group ring and a Boolean value in a cluster, and then unmold 7 of those in the cluster of selector.  Then you can use 'cluster to the table' and 'picture of cluster' for all elements of the external cluster will be of the same type.

  Also, be careful when using rings in the form of type definitions.  You probably want to use an enumeration instead.  The elements of a ring do not update the when you update the type definition because they are considered to be cosmetics. the elements of a definition of enumeration type update, because the elements of an enumeration are considered as part of the data type.