VI, Structure of the event - script user events

Similar Questions

• Worth the user events until the structure of the event runs?

  If I create and enter a user event and immediately generate this event before that my structure of the event has seen the refnum inscription, is the event that is always guaranteed to be seen by the structure? In other words, events are queued to the top? It works, but I wonder if I can count on it. I am very sure that I can but I'm setting up a production code and want to be sure that I do not take just the benefit of a bug.

  A picture is worth a thousand words.

  

  To my knowledge, the registry for event creates the queue. This behavior is always the same in 7.1, so don't expect to change.

  I think that there was a recent discussion on the lavas on that, but I did not.

  Felix

• How can I set up a structure of the event that sends text when the user presses the button "Return"?

  I'm new to programming of the Structure of the event.  I am trying a program which causes the content of a control to the string to be processed when the user presses the button back in after typing in the control of the chain.  I think (I hope!) that it is simple, I just can't understand how do.

  Basically, I would take the attached VI and change so that the user can send the value of control 'String In' to the indicator "String Out" either by pressing the 'Return' key or press the button 'send string. '

  Any help would be greatly appreciated.

  This example has nothing to do with the RETURN key specifically.  It fires all simply whenever the value of the control is changed.  If you click outside the text box or on another still controls the value changes and still the event is raised.  This is often the desired so if it works in your application, you good to go.

  You CAN ONLY answer a particular key if you wish.  Set your event to meet 'This VI' > key down.  Then, read the proposal Vcle on the left side of the structure of the event and compare it to the RETURN (for example).  The Boolean result of the comparison gets connected to a structure to deal with your code to run inside.  You can also wire Vcle directly to a case structure and execute different code based on which key was pressed last.

• Structure of the event without user interface

  I tried a quick and effective solution for a structure of event that is not a case of timeout and is part of a vi that has no user interface, but I have sent configuration data to the structure of the event.

  Let me be more clear: I have a camera that generates several events taken by a loop with the structure of the event inside.

  The provider of the camera give me this example of Labview code with all the events I'm interested and how they are implemented. I should mention that when you write a command of camera that a response to an event, but when you connect first to the camera there are more than 100 events generated by the latter, or when you download camera there are also several events. When there is no communication to the camera, the structure of the example event is inactive. The example includes a user interface to change settings and the program responds very well.

  I have to integrate this camera in great demand in which camera photo will be configured in a pragmatic way with number of the type of user interface in the example given by the manufacturer of the device.  First, I tried to design a loop with timeout cases in which a queue can send the data to the device setting configuration. Everything is good until the download when code needs to hold events in a certain way; in my case, an event is taken another goes to the time-out period and so on. After two sets of 100 images download, during the third round Labview gets blocked (Labview not responding) and I have to kill Labview. I got designer of the camera that if camera events are not taken they are kept on a pile and when the battery is full causes the Labview locked.

  Maybe I give too many details, but the question is: how to communicate with a struct event that is not a case of timeout and does not part of a user interface vi (it doesn't have a sign in my application)?

  Oops... Sorry about that.  I've attached an example what I'm talking about here.

  -Austin

• Add the occurrence to a structure of the event by using scripts

  Hello

  IAM trying to (using scripts) updating a structure of the event (the case of the event add) on a vi is not on memory.

  I get error 1054 the specified object was not found.

  Here's a picture of him.

  any help in this will greatly be apreaciated.

  The error comes from the open air, because looking for structure in the wrong place. While it is perfectly logical that the owner would be the loop in practice yet script is not that friendly - you need to get the reference of the schema of the loop and use it as an owner.

• More than a user sources for simple event structure of the event

  I have five different sources, I want to use to generate the user events using the structure of the unique event, acting as a producer loop. Is does not seem to be possible to use five different sets of create/generate user for a single event events structure and the structure of the event does not have the ability to add dynamic event hydrants more than once. Is it possible to do this by using the events structure and user event

  Kind regards

  Austin

  And again in LV2010, (good guess?)  I think this is what you need.

  Michael.

• 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.

• 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 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.

• structure of the event to turn on and off a LED

  Good afternoon

  I would like to activate a part of my algorithm according to the value in another part. To make it easier, I symbolize the value by a button and tried a structure of user event to turn on or turn off an LED located in another while loop.

  I can turn on the LED, but unfortunately I can't spend off of the LED thereafter.

  It is possible to change the structure of the event and select the option "change value". However, I would like the fatest way to turn on and off using the structure of the event and the Bay. I mean I would like activate a part of the algorithm only if the button is enabled for not having a continuous audit of the value of the button by the structure of the event.

  Please, if anyone has an idea to turn off the LED (after the switch on), add a comment without hesitation.

  I will be happy to solve this simple problem.

  Thanks in advance for your help.

  Ragards

  You have a race condition.

  When you click stop, it's a race about whether if the event gets not saved and destroyed by the removal of the stem all loop against sending the same user in the lower loop.

  Why it only seems to happen with the case of false must be a quirk of how the code is compiled and the order, it is run.

  If you put a step between your Boolean switch and LED, for me anyway, the error is now generated on the true case of the structure of matter (always false for switch.).

  If you put a constant error in the lower loop and wire while guaranteeing the Unregister event so that you now it does not run until the two while loops are arrested, then I don't see a mistake regardless of the value of the Boolean switch when you click stop.

• How to use the structures of the event for long-running tasks

  I created a state machine that scans a cluster of Boolean controls in a State of 'home '. Most of the States run a Subvi or two in ~ 100 ms or less.

  However, a State run for 10 seconds.

  The code works but the user interface is limited because the controls are outside the cluster because they provide inputs to the structure of State machine case but do not cause changes in the State. In other words, I all orders cluster stacked vertically on one side of the main panel and do not have the flexibility to move the controls to the more intuitive positions on the Panel.

  My question: How can I convert this code in a structure of the event and keep this long term 'event' and prevent that the operator by clicking another button event during the execution of this event?

  Thank you

  You say you have controls outside of your main code... You should really put these inside and manipulate them in a State of your state machine is initialized. This allows you to make changes to the code easier and limits of line entering your outside loop.

  You can do different things to lock the user.

  You can disable specific controls so that they can't be clicked or edited.

  You can use the palette of the mouse to define the busy cursor and disabled again once finished, I do this a lot during treatment when my code something loads the user just clicked.

  One of my favorites is to set a Boolean value in your data that passes through you event titled structure "disable mouse." When the value is True, a mouse down event will effectively reject the event, clicking on disable. I also added an event mouse move where if the bool disable the mouse is set to True, it moves an indicator of string with the mouse by telling the user why it is disabled.

  If you want more specific suggestions, I suggest to post an excerpt of your code, or attach your screws, so that we can better help you.

• reading two sensors (alternately) in a structure of the event permanently

  Hello

  I have a structure of event with various functions of the user interface. The entire application is on a laser diode control and playback of two light sensors IR which cover different wavelengths (if and InGaAs). The two sensors are connected to the same AD converter, but to different channels. So if I want to read the two sensors, I have to change the setting of the "Converter" AD channels. The real question is how to implement playback continues two sensors in the structure of the event? I want to be able to read alternately each sensor in a span of 50 or 100 m is possible, another using function of time-out of the structure of the event with a kind of logic xor for switching channels? Maybe something with more features (somehow by a timed loop)?

  Any idea is welcome.

  Thank you and best regards,

  Gregor first

  P.s. The sensor reading is done by a National Instruments SPI map where SPI is the master.

  2010 VI converted down

• leads the value change in the structure of the event

  Hello

  Please the the VI attached.

  I would like to know what event triggers when the value true or false of the changes led?

  In the case of structure above the structure of the event, the values of true or false of the led are changed.

  From the change, the analog output for Acquisition Card changes. However, the change event of the value in the structure of the event never fires, I know that I run the Vi with the selected highlight enforcement tool.

  Thank you

  Venkat Rao

  Changing the value in an event structure occurs only if one of the two following situations occurs.

  1. the user who modifies the control on front panel.  That may not happen since these LEDs are indicators and does not control.

  2. the program writes a value of property of the Value indicator/control (signalling) node.  Writing to the terminal of the indicator, or the local control variable / indicator not fire the event.  Given that you do not use value property (signalling) nodes in your program from this moment, won't happen either.

  Note that the value change event is a bit misnamed.  The change event is triggered, even if you do not actually change the data.  So if your LED is currently worth, and you write a True Boolean value for the Value property node (signalling), the event always fires even if you're not technically change the data.

• Structure of the event in a state machine

  Hi all

  I have a state machine with a sort of stand-by, where a user can select the next button state. I tried using a structure of the event with changing the values to select the next case, but when the state machine is in a specific case and the button of another State on the blocks of all things. I've attached an example, the lights simply stating that you are in the State.

  Thx for your time,

  Bert

  Edit: actually, I miss-clicked

  1. you have not need a while loop around the structure of your event.  With no wired time-out, you will never get a timeout event.

  2. your button events are set to 'Lock Front Panel until end of the event'.  Uncheck the box which.

• How to manage the structure of the event with two loops

  I have a question about the structure of the user event with 2 buttons?

  key 1: START LOGGING DATA

  key 2: STOP LOGGING DATA

  How do I control my

  structure of the event so that it will work? because now that the loop is save data... I can't stop the loop, when I clicked on buttons.

  

  

  

  super_saiyans wrote:

  the problem with moving it is that I don't have control of the DATA RECORD STARTING?

  Of course, you do.  When you get your press conference button, you say your state machine to move to the State of logging.  You must also make sure that you return to visit the State to wait for the event to check out the events of the stop button.