Saving the Control Values on a Front Panel

I am creating a VI in which I have approximately 10 front panel controls that can be changed by a user. Instead of entering the same values over an over again, I would like to provide the user the option to save a set of control values that can then be loaded the next time around via a drop-down box. Before I began I just wanted to see if anyone had done anything similar. I was stumped as to how to approach it. Any suggestions?
Matt

Matt,
You can also use a datalog file. LabVIEW can write and read clusters to a file, and as long as the cluster don't change you should be fine.
Basically your code would grab the value of each control, bundle it into a cluster and save that cluster to a file. For reading, you read your cluster from the file and get each individual value to drop it in the right control.
I'm sure there are some shipping examples on this too.
I hope this helps.
Regards,
Juan Carlos
N.I.

Similar Messages

How does the bacepanel control the control value of the front?

I want to use a button as the control one in the front panel and use it as indicator one,I mean that the same button can be used as the controlor and the indicator!
How can I do? Please tell me experts!Thanks

Hi,
If I understand correctly your question, you can do so:
Make a control of your button. So you can press on it. In the diagram, create a local variable for this button. So you can modify the button value programatically.
See attachment.
I hope it will help you.
Attachments:
Toggle_control_button.vi ‏21 KB

"Shared Variable Control" combo box on Front Panel is empty after Build

Hello;
I have a project using shared variables and the DSC module. I am working on building a .exe application now that the project seems to run well.
I have several places on the front panel where I have shared variable controls. These combo boxes allow the user to click the drop down button and browse the list of shared variables in the project, as well as "browse". When I run the VI from the project, the combo boxes fully populate with all of the deployed tags in the project (I have only one .lvlib in the project).
When I build the project and run the executable, the only item in the combo box list is the "browse..." selection. I can click on that and browse to my variables, but it is much more time consuming to do so than to simply select the desired variable from the drop down list.
So, how can I populate the list of shared variables from a particular library ino the Shared Variable Control combo box in a project build?
A couple of things I have done to try to esolve th problem are ensure that the "Enable Enhanced DSC Run-Time Support" box is checked in the advanced tab of the build window, added the appropriate .lvlib file to the "Dynamic VI's and SUpport Files" window under the "Source Files" tab of the build window, and properly deployed the tag library programmatically in the project.
Thanks,
Michael Hampson
Michael Hampson
President
XL Automation, Inc.

Hi Michael,
What you see in the development environment is to make it easier for developers, and as far as I know, there's no way to automatically populate the shared variable control during run time in an executable. The reason being that the shared variable control would have no way to know which process it should be using to get the variables from. The attached vi demostrate how you can acquire the list of shared variables in a process. You can also set the default values of the shared variable control by right clicking it on the front pannel, go to Data Operations->Make Current Value Default. I can do some more research on this, but I'm about 95% sure that there's no way to convert the array of shared variables to populate the shared variable control, as the shared variable control is a special type of xControl.
Yi Y.
Applications Engineer
http://www.ni.com/support
Message Edited by Yi Y on 07-02-2007 01:27 AM
Attachments:
SharedVariableList.vi ‏15 KB

How to create control dynamically while front panel fly using Xcontrol or anyothere options but without scripting tools

Hello friends
I have one doubt How to create control dynamically while front panel fly using Xcontrol or anyothere options but without scripting tools.I need to create the controls while vi is running.For example I need to create one Boolean while VI was Fly and i need one Examples it is easy to understand.
Jayavel

You must be using a different dictionary than the rest of us.
You can't dynamically create controls while a VI is running. (If I'm mistaken, then I'm sure someone else can jump in and say how it can be done.)
Do you have a finite number of controls you could possibly need? What you can do is create enough controls of the type you need ahead of time. At the beginning of your program, you hide all of those controls. As you need to create a control, you make it visible using property nodes. There are numerous properties you can set at run time suce as ranges, colors, captions, ... Of course you can't wire these controls to any other bits of code ahead of time since at that time, you haven't defined what you want each one to actually control. But if you use an event structure to detect when the values of the controls have changed, you can then programmatically pass the data off to other parts of your code using queues. The architecture can get complicate quite fast, so you may want to look through Ben's Action Engine Nugget and other related threads for how to create mechanisms for using these controls. Perhaps storing queue reference numbers or assign user events to each one.

Is there a way to change the colors of multiple VI front panels?

Hi,
I am currently creating a LabView program controlling a lot of sensors and actuators. I have based the GUI on a tab-control with different buttons which again opens up different VI front panels in a singel sub panel below. I realy want to have a different color theme on my program than the standard gray LabView theme, but I would like to change the colors for all my VIs in a smooth and quick way. I really would not like to click on all controls, indicators etc. to get new colors, as there are a lot of them! Any ideas out there, if this is possible?
Thanks in advance!
Lars

Lars,
please note that using the grayscale theme is recommended not only by NI. Using color is very delicate thing since you have to consider:
- readability of text might suffer due to insufficient contrast
- overuse of (signaling) color might distract the user from important settings/information
- color-blind user?
That being said, you can color the frontpanels of the VIs you include in the sub panel dynamically. Please take a look into attached example on how this could be done (LV 2009).
Please note that this is recoloring the frontpanel background only. If you need other elements to recolor as well, this can be done similar but is more effort....
hope this helps,
Norbert
CEO: What exactly is stopping us from doing this?
Expert: Geometry
Marketing Manager: Just ignore it.
Attachments:
FP ColorChange.vi ‏14 KB

Cluster of control references: want to access the control value

I want to be able to save and set control values that are saved (XML). I have my controls on about 5 sub vi's. So I thought it'd be a good idea
to put all the control references in a cluster from the several sub vi's and save and read from one point.
I can get the cluster values (i.e. the references to the controls), but how to proceed from here? If somebody has a better idea it is very welcome.
I have also read Ben's nugget here, but it deals with references to controls in a cluster, not references to a reference of a control in a cluster

Thank you for reading that Nugget!
I use a GUI Controller in many apps so I can grab refs in sub-VI's.
Here are some screen shots of them in use.
The first "GUI Cnt" is a wrapper around the AE and invokes the action "Set Analysis mode" then another call let me get a cluster of the refs so I can choose based on the name.
This image shows what that action does.
THis is what happens when going into collection mode.
That is a small set of what you will find in my image gallery Feel free to browse (yes I know there is a lot of Olivia in there ) and ask if anything catches your interest.
Ben
Ben Rayner
I am currently active on.. MainStream Preppers
Rayner's Ridge is under construction

Why am I unable to select the boolean indicators on my front panel?

Hello all,
This has to be an easy one for you guys, but here goes...
I created a front panel with approximately 20 boolean indicators on it (LEDs). I realized that I only had 10 functional, so I made the others 'greyed out and disabled'. Well, now the ones I disabled are functional again, so I want to enable them. Problem is, when I go to the diagram and select 'show indicator' it is still grayed out. I cannot click on the indicator on the front panel to 'enable' the indicators. I cannot select them at all.
I've tried creating property nodes and enabling them that way. They are no longer grayed out when I do this, but I still cannot click on them to move them about the front panel.
All
I want to do is select them so I can rearrange the way they look on the panel, but I cannot click on them.
And, yes, I've had my tool palete on both 'Automatic Tool Selection' and 'Position/Size/Select'. It is also interesting that I can select and move the indicators which I never disabled in the first place.
Any help would be great!
Thanks in advance,
Dave Neumann
[email protected]

"Neumannium" wrote in message
news:[email protected]..
> Paul,
>
> Part of the problem is that I cannot click on them at all. If I try
> to right click, the Controls palette pops up (like it would if there's
> nothing on the front panel).
>
> If I drag a box around them, they are not selected. It's as if they
> don't exist, but they do! They still function -- I can still run the
> test and the booleans react as they should, but they are not where I
> want them to be (the user cannot see them all without scrolling).
What happens if you go to the diagram and double click on the control? It
should take you to the front panel and highlight/select the control.

How do I cause a vi to sent the contents of it's Front Panel Indicators out to STD OUT?

I inherited an intermixed bag of software tools that are called from Command Line Interfaces I would like to add some code that I have written in LabVIEW to this bag. The only problem I have at the moment is getting anything that looks like a standard output argument from LabVIEW. Is this possible? For example lest say I have a vi that performs a number of tests based on input criteria at the completion of the tests the indicators on the front panel look like oh say, a Boolean that says Pass, a string that says Unit Name, and an array of strings that holds the names of the tests run, and a numeric that indicates the number of tests performed. How can I pass these values to STD OUT?

an old thread I know but wanted to share this howto use a LabVIEW executable with SystemExec
- pass your command line arguments by using the LabVIEW Application Property Node App.Args
- write to std out using System.Console.WriteLine
- write to std err using System.Console.OpenStandardError (string2byteArray, see screenshot)
This solution is pure .net and works for 32 and 64bit systems.

How to copy the XY graph on labview front panel and insert into Excel using labview

Hi all,
The XY graph display on LV front panel after test. How can I copy this XY graph and insert into excel file?
Thank you very much for your help.
Khanh

KPRO wrote:
Hi,
I refer to insert it into excel since report is in excel format, but if it's too hard to do so I can save it in another format.
Either way, will labview support this? Anyway, thank you very much for your quick reply.
Khanh
You are already using the Report Generation Toolkit? There is the "Append Control Image to Report.vi" that would make this easy.
There are only two ways to tell somebody thanks: Kudos and Marked Solutions
Unofficial Forum Rules and Guidelines

How to move NI hypertrend control around on Labview front panel

Hi everyone,
Please I would like to know if the NI hypertrend control from the DSC pallette can be draged across the front panel and how to do it.
Once I put this control on the front panel, it just stays where I put it and would not allow me to move it around.
I will appreciate any suggestion on this.
Thanks.
Solved!
Go to Solution.

Left click above left of it> hold and drag a box around it. This selects it and you can drag it.This works for me.
Using LabVIEW 2010SP1 and TestStand 4.5

Problems while saving the tax values in a Draft Document to AP Invoice

Hi All
I have an interface .net where I use a DIAPI to enter values in B1 2007 B (8.60.039) PL 15.
I have the following cases:
First case
- I create a document type oPurchaseInvoices, where I set the tax values for IRPF, INSS, ISSQN (Brazil).
When i execute the code that inserts this A/P Invoice in SAP, it works perfectly, including by setting the values of the taxes correctly.
Second case
- I create a document type oDrafts, and say that this draft is the type oPurchaseInvoices.
After that I follow the same steps to launch a note entry, laying the tax values(IRPF, INSS, ISSQN) and everything else.
When i execute the code that inserts this values in the draft, the tax values are not entered and that everything else works perfectly.
You can tell me whether the taxes really are not inserted when I issue a draft or I'm leaving to score some parameter.
I am in the look of your response
Regards
Luis Felipe

Hi Gordon.
You can see below the part of the code to add the Draft Document.
oAPInvoice = oCompany.SapCommand.GetBusinessObject(BoObjectTypes.oDrafts)
oAPInvoice.DocObjectCode = BoObjectTypes.oPurchaseInvoices
With oAPInvoice
    .Lines.TaxLiable = BoYesNoEnum.tYES
    .Lines.ItemCode = Itemcode
    .Lines.Quantity = Quantity
    .Lines.UnitPrice = Unitprice
    .Lines.TaxCode = Taxcode
    .Lines.WTLiable = BoYesNoEnum.tNO
    .Lines.Usage = "Consumo"
    If oDTO.IRRF > 0 Or oDTO.INSS > 0 Or oDTO.ISSQN > 0 Then
        If oDTO.WtLiable = "Y" Then .Lines.WTLiable = BoYesNoEnum.tYES
        Add tax values
        For i As Int16 = 1 To 3
            vlrImposto = 0
            addTax = False
            If IRRF > 0 And Not addIR Then
                codImposto = CodeIRRF   (tax code)
                vlrImposto = IRRF             (tax value)
                addIR = True
                addTax = True
            ElseIf INSS > 0 And Not addINSS Then
                codImposto = "F501" (tax code)
                vlrImposto = INSS       (tax value)
                addINSS = True
                addTax = True
            ElseIf ISSQN > 0 And Not addISSQN Then
                codImposto = CodeISSQN (tax code)
                vlrImposto = ISSQN            (tax value)
                addISSQN = True
                addTax = True
            End If
            If addTax Then
                (If include more one tax then add line)
                If i > 1 And vlrImposto > 0 Then .Lines.WithholdingTaxLines.Add()
                .Lines.WithholdingTaxLines.WTCode = codImposto                     (tax code)
                .Lines.WithholdingTaxLines.TaxableAmount = Unitprice              (base value calculation)
                .Lines.WithholdingTaxLines.WTAmount = vlrImposto                   (tax value)
            End If
        Next
    End If
    .CardCode = Cardcode
    .CardName = Cardname
    .HandWritten = BoYesNoEnum.tNO
    .DocDueDate = DueDate
    .DocDate = DocDate
    .TaxDate = TaxDate
    .SequenceCode = -2      '-1=Manual -2=External
    .SeriesString = "RCB"
    .SequenceModel = 37
    lRetCode = .Add()
End With
Regards
Luis Felipe

How to move control in front panel at run time

       Hi,
                I'm using LabVIEW 8.5. I want to move the control anywhere in front panel. For example in the attach file I want to pick up the pict control (with the help of mouse) and drop it anywhere in front panel. second thing I want to ask if I want to make it copy paste, means main control will b at its initial position and where the mouse moves the image moves and when I leave the mouse the image gets drops there. How to do it. Please help me.
                             - Thank You
Attachments:
track.vi ‏15 KB

"Sonali" <[email protected]> wrote in message
news:[email protected]..
Hi,            &
nbsp;   I'm using LabVIEW 8.5. I want to move the
control anywhere in front panel. For example in the attach file I
want to pick up the pict control (with the help of mouse) and drop
it anywhere in front panel.
You'll need to use an event structure to respond to the mouse down, mouse
move and mouse up events. In the mouse down event of the control, set a
value in a shift register to true. In the mouse move event, when the value
is true, change the position of the control with a position property node.
In the mouse up event of the control, set the boolean in the shift register
to false.
 second thing I want to ask if I want to make it copy
paste, means main control will b at its initial position and where the
mouse moves the image moves and when I leave the mouse  the image gets
drops there. How to do it. Please help
me.            &
nbsp;           &nbsp
;   
You can't copy paste controls during run time. It seems you want to make a
graphical application, where you can graphically drag and drop some
configuration or something like that. You should have a look at the picture
control. You can draw anything you want in this control, and catch mouse
down, move and up events in the same way. It is perhaps a bit difficult to
get to know it, but it is very powerful when you do.
Regards,
Wiebe.

Adjust control values while VI is running

Have another question, but its irrelevant to my other post so I thought i'd make a new one:
I'm near complete with this VI, however i would like to add the ability to change my Control values in my front panel while the VI is running, either through some sort of feedback or w/e. For example, if the power supply i'm running is at 10V during the time, i would like to bump it up to 20 v without having to start/stop the VI completely.
Is there an efficient/good way to do this?
Attachments:
Sweeping Voltage v2.1.vi ‏116 KB

Really not able to open your attached vi as most of its dependencies are not included. So without looking at it I would say that putting everything in an event structure, then having events trigger on changes to your controls would be the way to go. But without seeing the code ...
Putnam
Certified LabVIEW Developer
Senior Test Engineer
Currently using LV 6.1-LabVIEW 2012, RT8.5
LabVIEW Champion

Automatic Pause (through program) and Manual Resume through front panel Button

Hi, I am trying to implement a system which measures voltage and current for a varying source voltage at varying temperature. The program acquires 5 pairs of voltage and current data. The issue here is that the source voltage is varied by manually changing the value of the variable resistor. What I would like to do is somehow pause the program automatically once the loop (for acquiring 5 V and I data pairs) has completed. Then, after the user manually changes the value of the variable resistor (and enters the new value through a front panel indicator), the user should be able to resume the program through a front panel button like in this example: https://decibel.ni.com/content/docs/DOC-10792
Is it possible to implement this in LabView?
In summary: I would like to implement a system in which the program would pause automatically after a condition has been fulfilled, and can be resumed through a front panel button.
Thank you in advance for any help and suggestions. I hope I made my query clear. I'm not sure whether attaching the program would help but I included it just in case
Solved!
Go to Solution.
Attachments:
Resistivity Measurement.vi ‏132 KB

Hi all! I've overhauled my program after learning how to create state machines in LabVIEW. I think I've managed to make it able to pause program execution by staying in the Initialize state if Pause After Measurement is set to True, only resuming measurement once the user has pressed the front panel button to Acquire Data. Attached is the code for the program.
Thanks to you all for leading me to the right direction (I hope)
I have other questions though for some other functions I want to implement in the program (which are not very relevant to the original topic title). Would it be better to start a new topic or continue the discussion here?
Attachments:
Resistivity Measurement v2.vi ‏159 KB

Refresh graph properties (colors...) when front panel not opened

I have a problem with setting the plot properties of a multiple xy-graph.
I first pass the data (n plots, number variable) to the graph control, THEN I set the according properties like color, line style etc. by a property node beginning with "active plot" followed by the properties. So when I set them, the xy-graph is already initialized with n plots.
Afterwards, I take the graph picture and save it to a bitmap-file.
That works fine as long as the front panel is opened or the number of plots and their attributes stays constant. But if the panel is closed (which is the default of that VI) and the number of plots changes, I get only as many plots plotted correctly as there are shown in the plot legend
- regardless of if the legend is shown or not.
I don't like the idea of having a huge legend on the panel which still might be too small sometimes or having the legend scaled by it's height-property in pixels.
What I need is something like a .refresh-method that forces the graph to update even if the front panel is closed. Any idea how to do this?
Cheers & thanks, Daniel

The issue you are seeing is because LabVIEW doesn't update the controls/indicator of a front panel that is not open. This is done to save computer resources. The simple way around this is to use VI server to open the front panel for it to update and then close it again. You can use the VI property FP.position to move the window offscreen where it can't be seen and perform the open/close. This will get you the results you are after while still allowing the illusion of a closed front panel.

Saving the Control Values on a Front Panel

Similar Messages

Maybe you are looking for