copy a local variable without front double element

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• Copy a structure of event containing local variables

  Hello

  I am a state machine design in Labview and next state transition logic to wait be clicked a few buttons on the Panel.

  If I press a Boolean button from 1 to 9, next State should be X, otherwise condition (10 to 16 tags) should be there.

  I thought that the right approach, because it would be a structure of the event, where I added two cases: case 1 (button 1: mouse to the bottom button 2 down,..., 9 of the mouse down) and box 2 (10 mouse buttons down,...). For each of these cases, I'm reading & writing the local variable of some double digital.

  When I copy the structure of the event in another case of structure of outer case, I note the following: all cases in the event loop is missing, and the local variable renamed automatically and a new created indicator digital.

  • How to make an exact copy of the structure of the event, without the problems described above?
  • Could you suggest a different approach more effective than mine?

  Thanks for any response.

  Start by reading the guard and recommendations for using events in LabVIEW - LabVIEW 2011 help

  The fact that you try to copy and structure of the event to another, and that a structure of the event will be buried in a case initially tells me you are already heading on the wrong track and yourself in creating a world of problems.  Your architecture will never seem to work for you.

  The event structures are always active and capture events.  Even when the structure of the event is not in the path of execution, it's queue of events to which he attributed to him.  If you have events that are set to lock the façade until full, then you're really screwed because the event structure will capture the event, locking of the front panel and the execution path of your code with the state machine may never come to the specific case that has captured the event to support then release the façade.

  In general, you should have the structure of a single event in a VI, and should not be buried in a case structure where he can never carry.  You also shouldn't have several event facilities manage the same events.   These are not hard and fast rules, but until you are quite familiar with how the event structures work and completely understand the architecture of your code, you should not violate or you will just ask trouble.

  Similarly with the help of local variables.  The fact that you say that you have local variables and you try to copy tells me that you already have too many.  There is certainly a better way to build your VI, which does not require local variables with the exception of a few cases and certainly won't need several structures event buried in the structures of the case.

  You should probably have a producer/consumer architecture that handles the events.  Have a simple loop with a structure of the event which captures all user interactions.  Pass events to a loop of consumer who is also your computer through a queue of State.  (Also known as a computer state in queue or the BAU).  Let the state machine to determine how to manage the events, he received based on what is the current state of the VI.

• Local variables just "copy-paste".

  Hello

  Is it possible to copy - paste a chart area containing local variables without creating new objects on the interface?

  Thank you

  Gregory

  Use the command + drag instead of copy and paste.

  1. Use your mouse to select the items to copy.
  2. Hold down the control (Ctrl) key and drag the items to the new location.

  If you also hold down the SHIFT key while dragging - items remain aligned.

  To move items to another diagram, you've even pressed the SHIFT key.

  Steve

• Update zone drop-down list programmatically does not update its local variable

  Hi all

  I followed a Web site tutorial OR and programmatically change the items in a drop-down list box. It worked successfully, but not for local variables. Local variables while keeping the elements that had it before.

  Any suggestions?

  Thank you!

  

  You must update programmatically property value to change which returns the local variable, the value that you will wire does not match with one of the array strings.

  Maybe you need to do something like this to update your value to change the 'Two' to 'five '.

  

• Another question on local Variables and their use.

  I have read many many posts on forums how we avoid the use of locals at all costs because they go against the stream of LV paradigm however I tried to find a way to replace them in my programs and do not have.

  Basic explanation:

  I use a state machine to browse specific validation test steps and test of electronic equipment of base. (Panels, timers, relays moduals fuses) Many of these facilities contain LED indicator. In the tests, I took photos of the products and then used the Boolean flags to replicate the LED on the PC so that the test operators can check to make sure the equpiment LED turns on as needed. My problem is that many products contain 20 + LED and have no order to how they are turned on. Because of this that I eventually do a boolean for each LED indicator, put all the indicators in a structure of disabled, then using local Variables at each step to display on the FP LED should now be on. It's often a lot of locals throughout the program.

  I tried to make a very basic sample of VI to try to show what is a normal procedure. How can I reduce the amount of local Variables without increasing the complexity of my VI?

  If the LED change of State within the meaning of the criterion - within the case statement - you need a parallel loop.

  I did a heap of your LED and does an architecture of producer/consumer of your case, 'Test 2' attached.

  Edit: In my table, on the bottom line, the text should read "your 6 LEDS are now a Cluster" rather than "your 6 are LED not a Cluster."

• Remove the array without the local Variable element

  I am wanting to know if you can remove an element of an array, the index of the removed part.

  and update the value in the array to not include the deleted part of a more direct way than the following:

  

  Or, in my program, the table is initialized with some clues that makes the task of removing an element of

  table, the part removed from indexing and updating the table includes only not the deleted part similar to the following:

  

  (a) is there a way to do this without having to use local Variables?

  (b) I would be so concerned to rid my program of all local Variables? (even those who don't create race conditions)

  Keep the table in a feedback node initialized in the world. Do not imply not objects of façade.

• 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

• How to copy Step.Result.Error.Code in the local Variable

  How can I copy Step.Result.Error.Code to a stage in particulat to a local variable.

  I want to print the value of Step.Result.Error.Code in my test report.

  Help, please. Thanks in advance.

  Kind regards

  Sagar Joshi

  Yes of course!

  This is better handled by the recall of SequenceFilePostStepRuntimeError:

  (1) StepResultCode (number) is added FileGlobals

  (2) add SequenceFilePostStepRuntimeError callback to your movie file

  (3) the next stage of the declaration adds the recall of SequenceFilePostStepRuntimeError :

  FileGlobals.StepErrorCode = Parameters.Step.Result.Error.Code

  Here is an overview of the sequence:

  

  I hope this helps.

• How to read the values of the variables of façade in loops without using local variables or property value nodes?

  I know that local variables and nodes of property value are causing a lot of problems.

  But if I read the value of a variable front outside a loop.

  the value is only read once before the start of the loop.

  Changed the front variable values during the iterations of the loop, is invisible.

  How can I solve this problem?

  
  

• I want to fill and empty a tank automatically that can be achieved without the use of local variables?

  Labview gurus,

  I have a project to complete and I'm new to labview, I have the 2009 version of the student. and want to build an initial vi of a municipal plant to FILL AND EMPTY TANKS. I use the DSC module to help and I can get my tanks to complete a sequence, but it uses local variables. They cannot be shared on the network when I create my libraries.  Need urgent help...

  Casey74

  Here's a quick attempt at a state machine. See if it makes sense.

  (It can be simplified a bit more!)

• 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.

• Direct local variable data VS

  Hey!

  I do LV Core 3 and hope someone enlighten me more... (Excersie 7-2 Solution more about 01:50 in the video to be more precise)

  According to this module, an indicator that is updated very frequently must be connected with direct data and not a local variable. Research assistance he said local variables to make copies of the data.

  It's a bit like this:

  1. I have an indicator that is 'coupled' to the X position of the memory.

  2. If I write a light directly he wrote directly to the X position of the memory.

  3. If I could write instead through a local variable... It would first create a copy of the data to write to the position indicator Y memory and then copy it to the X position of the memory?

  Thank you

  Peter

  Yes it's true.

  Now, imagine if you have a very large painting (and the elements of array must be States.map in memory).

  the first memory manager must find a place in memory where it can hold the table and you now have a memory more occupied by the local variable location.

• local variable and high Ribbon

  I copied a VI to control the DSA8200 Tek to manage the DSA8300. I guess that all controls remain the same.

  The new DSA8300.VI is attached. Why does show DSA8200 in the top Ribbon on the front panel?

  And when I search this VI "8200", I find a local variable called "DSA8200.vi". How to change that to "DSA8300.vi"?

  I am also attaching ScopeDialog.vi, because it is called by DSA8300.vi.

  Thank you.

  efarr wrote:

  If you can shed some light on why it happened, I could learn something.

  A local variable is the name of the control on his face and that's all the information you need. If show you right-click on any variable local and it the label, the label will be the file name of the container VI. Since you have already changed the name of VI, it has already changed to DSA8300.vi. Since it is redundant information, there is no need to ever show him the label of a local variable.

  I have never shown a label of a local variable before, it was new to me too.

• 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.

  

  

  

• 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.