Locking of Boolean controls on front panel - suggestions

Similar Questions

• How can I change the value of a control on front panel?

  On the front panel, I'm doing a complex control that consists of a Slider control and control of the digital inputs. Both controls display the same information and either may be used for entry. When changing value, I want the other control to display the same value.

  How can I change the value of a control on front flap when another control changes the value? I know how to use a structure of the event to detect value has changed, but I do not know how to impose control on front panel to change its value in the block diagram.

  Why do you not use a digital display on the slider, and no code is required:

  

  EDIT: Yes, he said. ***

• How to set the default value for the digital control on front panel?

  How to set a default value for a numeric control of LabVIEW 2009 Front Panel? I have several input values that are actually configuration settings I want to settle with the default values of zero. I want them to be the values displayed when the façade first appears until the code is executed.

  I really want to use the Minimum and Maximum limits by default for this because I still want to be able to define acceptable limits for values.

  I would not be able to specify a default value of zero for these entries?

  Enter the desired value, then "right click...... of default data of value to operations. Save the VI.

• Highlight string and boolean set on front panel

  I feel like this should be very simple, and I did a lot of research and can't find an answer

  In my program I get channels and see if they are active or not. If they are active, it is a Boolean that turns on.

  What I want to do is display with a shared scroll bar to quickly view and edit the.

  The only solution I have to this problem is to carefully match the size of string of Boolean size frontage and tell then the façade that if Scrolls one side then the other on should do the same (with a slight delay). Get the Boolean and string to coincide perfectly is very tedious.

  Is there an easier way to do this?

  -MK

  
  

• Using the 'current default values do' as a control on the front panel

  Hello

  I'm building a VI that uses a lot of digital controls. I want to use "do current default values" as a control Boolean on the front panel for the user.

  Is it possible to implement when the program is running? What would be an alternative, if this was not possible?

  Thank you

  Mhaque

  
  

• Programmatically disable the controls on the front panel

  Hi all

  I have a case in which I need to activate the control of front panel during scanning or taking data and when this case is false / when not not taking data. I try to make the Subvi usng vi reference, the node property, making the label controls and disbaling it. I want to disable the control listed in the table during the real deal and allow them to return to the case of fake. But right now, it of not working and hangs my main program. Please see the vi attached and help find where I am doing wrong.

  Thank you

  The best way would be to create an array of references to the controls you want to mess with beforehand.  I say that because I'm guessing that you have several groups of controls you will be turn on/off at the same time.  If you have a table of these controls already created, then just run the table in a loop FOR and use the Disable property.  I made a few minor cleanups in your current VI.  I got rid of the outermost case structure since the two cases are essentially the same thing.  A selection function allows to choose to enable or disable.

  NOTE: the forums are screwing again and not let me post a VI.  Change the extension back to vi to open it in LabVIEW.

• Update the controls on the front panel producer consumer

  Hello

  I wanted to ask you a few tips.

  Usually, when I implemented a consumer producer I use producer to create items from queue whose state of the enum and pack all the necessary data in the process of the event in a Variant.

  Then the consumer does all the work.

  There are two areas where I feel that I could not be using the best approaches...

  (1) when I need to update a control on front panel I Pack a reference to this control on front panel in the variant in order to access the property nodes in the consumer and to update.

  I have attached photos with an example. It's simplified code where the user must perform a task of data acquisition in the analysis of certain parameters. The code increases the setting of a fixed amount to each race to help the user in its sweep.

  Is there a best way to do this?

  (2) when events require the same control to be plugged into the variant for the handling of the loop of consumer I create local variables or references to this control to other events. Would it be better to have a registry change that crosses the loop producer which gets updated values of façade at each time the loop iteration?

  Thank you.

  Because you use a loop of events such as the producer, I would use user events to update your controls.  This way you are not circulate references just to set/update a control.  You can make a user event and handle this event with the structure of your event.  Your client sends just the event with all the necessary data.  I found this configuration really useful since it retains all the GUI code centralized in a single loop.

• Front panel FPGA Boolean mechanical action is important to control the actions of a host RT?

  When a host RT controls an FPGA VI shipped through Boolean values on the face before of the FPGA VI, no matter what setting the mechanical action is used by the Boolean front panels?  For example, they all just act as "Switch When you press on" or the law "lock when you press on" as one-shots?

  Okay, it looks like I have a little bit of clarification to make.

  First of all, the patterns of waveform above are correct. As soon as the handshaking signal Host_Write if high, the data is written to the next clock cycle. At this point, "Lock" options are equivalent to eachother, and all the options of 'Switch' are equivalent to the eachother. Each takes 150ns to receive the signal of Host_Write.

  The only thing in my post above that is misleading is when I said that transitions occur at the same time. This is not true, as the writing must be serialy, 150ns apart.

  In case anyone is interested, I enclose the test and the test bench project. On your host machine, simply generate the files for the simulation construction-spec, then replace the tb_NiFPGASimulationModel.vhd generated by the one I've attached (this is the test bench). This should be at "C:\NIFPGA\simulation\FPGA_Boolean_Mechanical_Action\FPGA_Target\MechanicalActionTest\user". Given that forums don't add .vhd files, please rename the .txt in .vhd.

• Front panel locked, but not due to the structure of the event

  Hi it LV community.

  I did a staemachine program that executes an oscilloscope (screenshot of a provided below... the State of the problem). I ran my program yesterday and it worked very well. Then, like a model, a dialog box opens and I just clicked on it in a hurry. now my front hangs as soon as I move the above-mentioned State "the Oscilloscope settings.

  As indicated, I have go a repeat loop that collects successive impulses of my oscilloscope and displays on the front panel (it works fine). In parallel, I have a structure of the event that makes the tail for the real-time feedback of changes to parameters that I placed on the façade (exodus of state change).

  Here's the problem: as soon as I State 'Oscilloscope Settings' using a Boolean button on the front panel for get me there, the front hangs... No event triggered by this point, and even if it did, I already deselected the "Lock panel until the end of the matter for this event" checkbox in the case where the structure menu.

  So WHY is my front lock now? Thoughts anyone?

  Read the detailed help for event structures.

  He urged that a single event structure serve in a VI. There are moments where more can be used effectively, but caution and a thorough understanding of the structure are needed.

  The problem is that you have several structures of the event in the various cases of the state machine and they are set to respond to the same events.

  When the button Set Oscilloscope, the structures of the event in the purchase Menu and home screen States receive the event. The two lock the screen, but only one of these cases may work. It can transfer control to the State of the Oscilloscope settings, but the other event responding to this same event structure maintains the locked Panel.

  The solution is not not to release any of the event. The default value is usually the best setting. The best solution is to spend on an architecture of producer/consumer (events). Who uses two parallel loops. The producer has the one and the only structure of the event and passes orders to consumer loop through a queue.

  Probalby want as the mechanical action on the buttons to lock when you press. Put kiosks inside the respective case of event changed value and local variables becomes unnecessary.

  Lynn

• A way to group controls and indicators on the Front Panel and that they can be made Visible or not as a group?

  I would like to combine several orders and LEDs on the front panel in a group in a way that allows me to do the whole group Visible or not.

  I tried to use a Cluster, but it has a side effect that all elements must be inside the controls or indicators, but not mixed.

  Is there any graphic element, like a panel that can contain other controls and indicators on the inside and make them Visible or not as a group regardless of whether they are commands or the LEDs?

  Good suggestions on how to do this?

  Thank you.

  The tab control is still not my favorite, appearance but it's a way fast and effective to show and hide groups of controls and indicators.

• Functional global variable home (RFGV) is cut off by the controls on the front panel

  Hello

  I though that I had found the ultimate way to dynamically manage memory in a system of Exchange. I read on RFGV here: http://labviewwiki.org/Functional_global_variable and put together a static FGV normal to follow the references for each created instance of memory which I then could easily remember just by name. But now I found that all the RFGV completely stops whenever a front panel with a menu control is used, i.e. 'enum', 'ring' or 'control path. I tried to put in different delivery systems, but not luck. I read about that guy who could have fallen into the same problem: http://forums.ni.com/t5/LabVIEW/Do-I-need-to-use-a-semaphore-when-reading-writing-a-functional/m-p/1... but he got no help what I could see.

  I have not tried semaphores. Don't know what that is. Check my little test code and tell me what I am doing wrong. Or maybe there is no solution in this case I have to abandon the idea of the use of RFGV for anything. Maybe memory held all the VI will be assigned statically.

  Run the code (in LV2009) and watch the 6 LEDS Flash. Then click on anyone of 'enum', 'ring' or 'path' (the file dialog box) and watch off LED when dynamic memory is used to write or read while the continoues to static VI.

  Any suggestions?

  Best regards

  Kai

  If the memories are good, what you're running against is not the user interface thread, but an internal mechanism of LV called the loop of the root, which must run in some things. Specifically, in your case, the method run a VI and showing a menu (a menu real, or a context menu of a ring).

  You can work around this problem (and greatly simplify your code) If you use the call node of the reference instead of the method to execute a VI, but I wouldn't recommend it anyway, since I assume that your code is not what you think it does. In LV memory management can be quite complex if you want to be able to control it, so if you feel you really need, I suggest to start by searching for existing materials on the management of memory in LV

• I have the same front panel control in several events?

  I tried to find it in the forums and knows that there must be a simple answer, but being a left tackle L again, this one is cheating on me. So:

  I'm programming a small mission-generating program that will allow a user to create files of the mission for a small underwater AUV. These mission files can be created in Wordpad or similar, but I wanted to make an application where the user doesn't have to worry about the sometimes finicky syntax etc. The operating system of the AUV is based on linux. It is also a good opportunity to practice my LabVIEW file, management skills and experience programming state machine.

  I created a state machine, and is one of the States 'Add Primitive'. A primitive is one line of text that can be 'go to xyz', 'surface' etc. 'home' with the coordinates or other settings entered on the controls on the front panel when the appropriate primitive is called. I there before had 8 orders of the Panel before the user can choose to primitives with and structure of the event with a pane for each control. Each event, then displays string writing for this primitive controls and property nodes hide everything on the front panel.

  My problem is, I want a "Validation" button that will write the primitive duly filled in the file and display the file so far in a preview window. I can only put this button of validation in an event well and I can't use local variables. I want the same façade of control are committed to do the same for all the different events in my structure. Is this possible?

  I think that maybe the control and my preview pane should be outside (to the right) my structure. Or maybe a case of event isn't the right way to go at all. Any suggestion would be appreciated.

  Thank you

  I recommend some redesign of your state machine.  You should have a State just to handle events of the user (have the structure of the event in it).  The start State should go directly to that State of "idle".  You can then manage each button with the structure of the event rather than do an interrogation of sorts.

  In each case in the structure of the event can determine what State to spend.

• Boolean front panel disconnected from the block diagram

  It is very strange behavior I've ever seen elsewhere.

  I opened a program that I have used before that works, after the replacement of some dll which is called.  I don't know if it's relevant, but just in case.

  In any case, I have a structure of the event in a loop.  Events are to turn certain values of output in a bitmap and update some of the entries.  As you can see in the screenshot of the time-out loop, the values of the input bitmap are fed directly in the Boolean flags.  The problem is that even if the thread is true, the façade is not up-to-date.  Also, when I click on the button stop, the Boolean value on the wire is not up-to-date.  You can see on the screenshot of the probe and the front panel.

  At no time have I stopped explicitly updates from the front panel.  Indeed, the status indicator updates correctly.  But he only makes a Subvi.  If you pass a reference to a front panel indicator in a Subvi, it locks the front for some reason any?  I thought for sure, I had done this several times in the past without problem.

  I'll post not rather the VI publicly without more deletions.  Just the stuff company owner.  I wouldn't mind sending them to someone OR, however.

  

  

  Thanks for any help.

  It was apparently a transient state.  I arrived, open LabVIEW and the VI, and everything is fine now.  I don't know what that looks like, I am back and found a few nodes property overwrite values.  I promise you that I will not change anything.  I should have tried this yesterday, but it was the end of my day at that time and I had a place to be.

  If you want, bradyAE, you can send me your email address and I'll send you the VI, if you think it is useful to investigate it.  Like I said before, I would rather not post it publicly.

• Best way to reset all controls on the front panel except one?

  Hello world

  I have an interesting problem, whereby I need to run successive tests using a test station which has several indicators on the front panel. At the end of each test, I need to reset all to default values, with the exception of a control (Test ID) who needs to keep his information - its value is used in an initialization status for test to ask for information from a database, so it can not be reset with the rest controls.

  I post all orders at a time using a reference ThisVI and VI Default Vals.Reinit All method, but this will obviously reset my control values (Test ID) as well. Any suggestions on how to keep properly or may store this information control while resetting all others. I can reset individually others but there is a little and more can be added as this system is developed.

  I don't really know what is the right way to proceed, and Labview has maybe one trick in his bag that I know to work around this problem.

  Thanks in advance for your suggestions,

  Alex

  Flank the node invoke with two nodes in the value property of the control to maintain the value. To the left we read as well as a right and the wires together. Connect three nodes with a thread of error to establish the order of execution.

  First reading place value on the wire, which is then written after the values have been reset to the default value.

  

• Controls on the front panel does not work

  In the attached vi (I've stripped down to simplify things), I have a problem with the controls on the front panel does not when you click on the control to acquire it. It of probably something obvious but got me to loss.

  Thank you

  It is probably because you are in the State to acquire until you're done absorbing.  Meanwhile, none of your other events can run.  You have events to acquire: let the mouse.  There is a setting for "Panel before locking up the end of the occurrence of the event.  Given that the event cannot process until your State acquisition is completed, the façade will be locked.

  I would recommend another loop for the acquisition of your data.