Iteration in a structure of the event on the subset of elements of control

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• To have the value 'All' in the list of elements of control in the value of array type

  Hi all
  
  To have the value 'All' in the list of master points.
  Need to create a set of value that shows the items in the inventory template and append the value 'All' in the list, so that the user can select.
  
  I have the below query that does this. But how can I highlight the value of table type.
  
  SELECT ItemList segment1
  OF MTL_SYSTEM_ITEMS_B
  WHERE organization_id = 0
  UNION ALL
  SELECT 'All' ItemList
  OF the double
  
  Please do the needful.
  
  Thank you.

  Hello
  One way to do, is to create a database for you view query and base your value set on this point of view.
  Hope this helps,
  J.

• structure of the event, business, number of iteration

  Hello

  I'm looking for an example of the Structure of the event from the book, LabVIEW for everyone: graph of programming made simple and fun.

  The example in the book looks like this:

  The number of "completed work" is equal to "number of the iteration.

  

  But when I create a Vi and try this example, I got this:

  The iteration number is twice the 'work '.

  

  I enclose my Vi. Anyone know what is the problem with my Vi

  Thank you

  Bing

  Activation and the Boolean value Deactivateion causes events to change the value, but you add only 1 when it is activated. If you set the Boolean action mechanical latch instead of the switch should be the same.

  /Y

• How to control the structure of the event

  What I'm trying to do, it's when the condtion is true, I want that the structure of the event to excute. But the event structure wil excute not except if he's changed the puch model, any idea how?

  It is more likely that he wants the sequence of events that he has set up to run after the result once changes.  If you change the logic to check the values after each numeric change (2), you will need to learn how to check to make sure that the latest iteration was not true.  Otherwise, it will start the sequence over and over.

  Really, you have to escape completely the structure of the event.  This isn't what you want.  Your code lends itself to a great state machine.

  You'll want to ask you a few things:

  (1) I want my code to run continuously or I just want to check double-digit times? (your code is currently the second)

  (2) I want the user to be able to stop my code once the sequence begins? (it is usually a Yes)

  (3) what I want 6 Road, path 5 or the comparison to happen first?  I want all run at the same time?  Do I need one before the other? (currently, you cannot predict what will happen first).

  You will need to understand the topics are: State of the machines, the flow of data, structures, business, calendar, and race conditions.  Now, you need to get you into trouble.

• Structures of the event, radio buttons and the property disable node

  Hello

  I have a very simple VI intended to simulate what I'm trying to accomplish in my program... in fact, when the 3rd option button is selected, I want the text box is disabled and grayed out.  Instead, the case of the event seems to perform the action on the * next * the iteration of the loop.  Can someone tell what I am doing wrong?

  Thank you!

  The terminal of the radio control is inside the case of the discipline concerned.

  (.. .or you can read the new value from the data event [NewVal] node instead if you need the Terminal also).

  Currently, it is read immediately and the value placed in the tunnel. When the event is triggered, the expired value is read from the tunnel.

  Once you pass the terminal in case of the event, it reads only after that the value has changed, and you get the current value.

  Also:

  • You also need an event for the button stop, otherwise the VI cannot be stopped easily.
  
  
  • You have the same property node in any of the structure of the case. Put it down after the structure of the case and one is enough.
  
  
  • Things that are different are inside the structure of the case.
  
  
  • You can combine the cases that are the same (not the default)
  
  
  • You can remove the case of timeout.

• Button value change records in the structure of the event, but does not change appeaance?

  Hello world

  A quick question... I hope someone can answer...

  I have a code that uses a PS button within a structure of event to trigger a signal of AO... My code is below. The code works fine and the OD goes off when you press the button E-Stim... But when pushed the button does not change with reliability the appearance (i.e. of the gray 'off' red 'on' color)... Sometimes color changes; no other time not... If I remove the structure of the event and the survey button in the appearance changes as expected.

  What is going on? I would like the button to change the colors on the user interface to indicate that it works... Should I programmatically control the color?

  Kind regards

  Jack

  

  I guess that when query you the button you have some delay in your loop? Locking means that the button will change its value when you press it, then switch back to the original value once the value of the control has been used by the code. When you ask, this means that until he reaches the next iteration of the loop, but in the case where the structure that will happen immediately.

  The default setting for the buttons to modify its behavior as in most of the application would be latch releasing. You then raise the event when the button of the mouse over the control. This also allows "drag" control if you push down on the subject, given that you do not release control in this case.

• LabVIEW 2012 while the structure of the event does not stop

  I am LabVIEW 2012.

  An example of a while loop with the structure of the event inside can not be stopped with the stop key, Boolean.  Something wrong?

  Please see the attached VI.

  Thank you.

  Yes, something is wrong. You must add one for the event in order to detect a change in value on the stop button.

  The thing is now your structure for the event rest waiting for one of the event which she handles and ight now, it handles the "close panel" event, the 'timeout' event is too manipulated, but since you do not have anything related to the terminal of timeout (top left of the structure of the event) the timeout is - 1. So, when you run the VI the while loop is stuck in the first iteration and is waiting for a sign nearby, the stop button will only take into account after that same structure intercepts an event; I think it's because LabVIEW will execute the code related to the Terminal stop of the while until after the rest of the code that he has completed execution of the loop.

  Hope this helps

• Simulate the structure of the event in the LabVIEW base?

  I have a basic version of LabVIEW (v8.6) who doesn't have the structure of the event. I found it was quite embarrassing monitor the status of several controls (action after clicking a control depends on the State of the other control (s)). Especially if I want to add another function (control), the effort exponentially increase with the current number controls

  I had an idea to simulate the structure of the event using "shift register. First, I will provide all the values for the controls in a cluster. Then I'll put the cluster in a while loop and compare the value of the cluster to its previous value (xor the registry change). If the result of the comparison is false (none of the control is changed), the program moves to the next iteration. If the XOR result is true (one of the control has changed), then the program goes into code (it will pass what control has changed and the entire cluster) event management. So for each change of control, we can write an independent code to process the event. After processing of the event, the event was allowed.

  Here are some of my ugly code currently used to monitor multiple controls. And I think rewriting using above idea so there is less chance a hiden bug.

  Comments, suggestions?

  I'm not quite sure what I'm looking for on your photo of your block diagram because it seems that only the lower quarter right in your code.  I would do the following to detect a change in a cluster without the structure of the event control:

  

  The basic package include the notifications than us?  You can put your "event management" in another thread by this method:

  

  The advantage here is your main loop of the program is not "bogged down" every time that a change in your cluster held.  It also allows to separate the code so that it is cleaner.

  Hope that helps!

  -Fisher

• Structure of the event can be triggered a 1 event

  I am using a structure of the event to trigger a 1 off the coast of the event.  I thought that I could check the State I want to trigger the event and this thread the Val (signaling) a Boolean property.  Then I created an event to change the value on this command expects the event fires when the value from false to true.  I think it is this writing in Val Signaling property raises the event each time not only when the value changes.

  The attachment is a simple vi to try to illustrate this point by using the iteration count to try to trigger a 1 off the coast of the event on the 10th iteration.  The Boolean 'once' varies from iteration from False to True on the 10th, but the event is fired for each iteration.  Need to run in debugging

  Any help much appreciated

  Ken

  I've seen this confusion on the value of property front of signage. You expect it would only trigger an event, if you write a different value than the control or the indicator has been set to. This is not the case. She fires whenever you write to it.

  Your simplified example wrote to the property value of signage in the while loop for each iteration. That triggers the event value changed whenever you write to it. Notice that the property is 'signs of value' and not 'value has changed the signs '.

  Some of the examples were complex with the authors of notifications and user events. But the easiest way is just to put the property within a business structure node while it is written only when you want that one off the coast of the event. It does not matter what you write to the node if you send all the data for the case of the event.

  If there is a reason you must write to the Boolean value of traffic property on each iteration of the loop you can use the value written in sub condition to run code in the event. But notifiers, queues and the user just looks complicated events.

• Instead of using the structure of the event with the producer consumer?

  I used the architecture of producer-consumer in the past to control a state machine with the structures of the event.  I'm working now with the basic version of LV that does not include the structure of the event.  Can anyone recommend alternatives to the use of the same architecture in this case?  Thank you, David

  Before the introduction of the structure of the event, the only option was the election.  Control terminals are in a time loop (the producer) with shift registers and a wait, usually about 100ms.  At each iteration of the loop, the control's current value is compared to the previous value.  If it has changed, and then take appropriate action.  Andrey suggested, queues are a good way to pass information between the loops.

  It works for the equivalent of the value change events.  Things like mouse to top or filter events were much more difficult or not possible.

  Lynn

• structure of the event with a local variable

  Hello world... I tried to make a simple program with the structure of the event in Labview.
  I need to show a value in a table, when an external signal changes its value. (I read a lot of discussions and many documents and I don't understand the thing... Sorry)
  I want to say that I am getting a value of temperature of a sensor in a controller, it works in asynchronous mode sensor, so that the detector Gets a new value in different sampling rate.
  So the PLC program changes the State of a Boolean variable simple that in Labview, indicates that there is new data (newdatareceived---> 1,0,1,0,1,0...)
  I need this draw Labview (valuereceived) value in a chart when this variable (newdatarecived) changes.
  My problem is that the table always puts a value according to the cycle time in its loop and resumes the values... (I tried, with dynamic events and signage value... and I got the same result... It works fine).
  Thanks in advance.

  And the other way:

  

  Thanks for your time again.

  STPG wrote:

  I've been doing a little test with xygraph and the example works now (thanks!) but I have a doubt, is this the right way or is there a better way?

  No, this code is meaningless. You write new (mostly the same!) points to the graph xy with each iteration (actually at twice the speed at which data can actually happen: 100 ms vs 200ms!), tax system unecessarily and more internal data structures like crazy.

  All you need is a simple loop with a single structure of matter which is true if the Boolean value is different from the previous iteration. Currently, you must add a point (the time for X, the value in Y) to the xy graph. Here is a quick sketch. (You can either use the meter or the elapsed time for X, according to your needs, so change if necessary).

  Events are mainly for the interaction with the user in order to avoid the loop turn unless necessary. Here you are already running a loop to interrogate the instrument and you can easily have the graphic way the same loop. Right?

  You should also be aware that the execution order is determined by the flow of data and not in a horizontal position. If it's important that OCX nodes running first in an iteration, you create a dependency of data (for example with the wire of the error). Horizontal compensation has no effect. The structure of sequence on the left has also does no work, then why is it there?

• using the structure of the event in the LabVIEW classes

  Hello

  I'm new in the use of LabVIEW classes, so don't know much how I can use them.

  In my main program, I have clusters with five elements in each. The elements are controls two States and in some groups, there are three States controls. The user will press the buttons (controls), and different things will happen. In my first program were I not using classes, I had a structure of the event and the controls were cases of event in the structure.

  Is it possible to somehow use an event of cases in one of the methods that is created in the classes, so that say, that's not in the main program?

  I have attached two photos: I wanted to have a structure of the event in servoTouchEvent (in left.tri.lvclass) who is a child.

  Let me know if my explanation is not clear.

  Grateful for the help!

  Hello

  Yes, you can have a structure of the event in a Subvi rather in your main VI of top-level UI. The trick is to use the 'Save for events' and passing in references to orders that you want to have the event trigger structure for. The refnum output since the function is entered in the terminal of dynamic event of the structure of the event who could live in a Subvi. You can add instances of event where you will see these control events as dynamic events then you can do something with. These excerpts from shows all the code in a simple diagram, but the stuff in the structure of disable diagram could easily transformed into a Subvi:

   

  All this can be done without classes. What will buy classes you include the ability to encapsulate your screws and also perform different code based on what object on the hierarchy of the parent-child classes is on a wire. If the behavior of your code is different between 2-3 State and controls (which I do not know what state controls 3 you are referring), you can take advantage of the classes.

• major error with the structure of the event

  IM under LABVIEW 13.0 PRO

  I don't know when this strarted bug happening, but now when I add a business to a structure of the event. Freezes in LabVIEW. I have to close labview with the Task Manager.

  It doesn't matter what code I'm working with, even a new VI, with nothing else than a structure of the event.

  I tried this on my desktop PC, my laptop and my CPU DAQ.

  The error occurs on my desktop and my laptop. But it does not occur on my CPU DAQ.

  Whenever I click on add event usually case, you get a popup to configure and add cases, but with the popup error never comes to the top and labview crashes.

  Theres no code to share the problem ocured when adding events to the event structure. It happened with any structure of the event, in any code, all the time.

  I spoke to an engineer of apllication of labview and suggested to delete the labview.ini file located in the installation of labview directory. I did this and the problem was solved.

  Still not sure what caused this to happen.

• Structure of the event in primary vi and sub - VI with queues

  Hi all

  I have an application that uses the architecture of producer-consumer in which a queue transmits messages of a main VI by a Subvi, in response to the events of the user in the front panel. Inside the Sub VI, the queue is removed and treaty based on the corresponding message, and the result is displayed on the façade the sub of VI. User events are captured in the main VI using a Structure of the event. This works as expected.

  However, I also the controls on the Panel before the sub - VI to change the queue. My approach is to have another structure of the event in the VI sub for this. However, while the events in the main work of fine VI, events of sub - VI never treated.

  A simplified sandbox VI of what I'm trying to do is attached. As you can see, the main VI events are triggered as expected, but events in the sub VI are never triggered.

  I watched this white paper: detect an event in a Subvi from a high level VI , but it's not exactly what I'm trying to do. Instead, I'm just trying to detect an event generated within the Subvi. I searched this forum and found some research related, but none of them seemed to answer what I'm trying to do.

  Thank you

  Matt

  Your major issue here is the loop location.  While the structure should be inside the Subvi to make a message in the appropriate queue manager.  In fact, you should have 2 loops within your Subvi: 1) the QMH and (2) of the event loop.  You must use a user event to congratulate the event loop in the Subvi to stop.  You should NOT use the time-out of the Structure of the event unless you absolutely must.  And since everything in the Subvi is the message function, you do not have expectations.  They will be inactive (no CPU using) when there are no items to process from the queue or queue.

• How to create a Structure of the event, repeating a task until a push a buttom

  Hello!

  I want to make a program that repeats a task until a push a buttom (indicating to begin another task). I know how to do this with a structure of the case, but I want to know how to deal with the event. Any idea?

  OK, I'm going to help you a bit.

  

  Here's how it works: the upper part (producer loop) will pass the value of the OK button (switch released) to the Message Handling loop (consumer).  When the button is true the consumer runs the code in the case of the real and enqueus another loyal to himself and then wait 1 second.  When the OK button is False, the value false is appeared on the front of the queue and the message handler runs if false, empty the rest of the queue and waits for the next message the event loop.

  The Stop button (by releasing Latch) exits the event and the queue is destroyed causing the Dequeue return an error and leaves the message loop.

  This is obviously an extremely simplified QMH.  To read up more about concepts go to file > Create Project > and click on the "More information" link