Reset numeric control to default

Just wondering if you can reinitialise a numeric control to default value while a vi is running. I want to enter a batch number, when I press end batch button I want the batch number numeric control to return to either zero or blank.
Thanks,
David
Solved!
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Yes you can, see attached example.
BR
/Thomas
Attachments:
BatchTest.vi ‏11 KB

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Default value of a numeric control

Hello I want to fix the default value of a numeric control using his node property but I haven't found this attribute. It's possible to fix this value through the node property of a block?
I've tried to fix it, right-clicking on the control....properties....default value....but when I save the vi's and I reopen the vi's, his value has disappeared and value is set 0.
Do you know another way to fix this value?
Thank you in advance
Larson

The default value is only relevant when the VI is loaded into memory, not every time you start running it. Your code is probably changing the value to some out-of-limit value (probably 0 if your calculations are incorrect) and it is coerced to the minimum. If you want a value to remain constant, don't change it.
The answer is simple - DON'T RUN CONTINUOUSLY! If you want something to repeat, use a loop. That way, the value will only need to be read once, when the VI starts running. If this didn't help you, you should post the VI and explain more about your problem.
To learn more about LabVIEW, I suggest you try searching this site and google for LabVIEW tutorials. Here and here are a couple you can start with. You can also contact your local NI office and join one of their courses.
In addition, I suggest you read the LabVIEW style guide and the LabVIEW user manual (Help>>Search the LabVIEW Bookshelf).
Try to take over the world!

Reinitialize Default Value of Numeric control

Hi all ,
Is it possible to reinitialize default value of numeric Control while running labview ?

hi CsabaF,
First of all
i wants say for your Kindly reply ...
Your second Post Seems okay for me but it in my case i have loots of input controls
i have added VI file as example (if i get some easy solution means no need to create config file process)
Attachments:
Untitled 8.vi ‏10 KB

How can I highlight the default data in a numeric control when a VI loads.

I have a VI that features a string constant that asks for a numeric response via a numeric control, a "next" button that enters the data (controlled by the enter key), and two leds, one that lights if the data entered is correct, and one that lights if the data entered is incorrect. Is there anyway that I can make sure that when this VI loads, the zero in the numeric control is highlighted?
Currently the opeator must use the mouse to highlight the zero in the numeric control, type the number and press enter ("next") to advance in the program. I want the operator to be able to simply type the number after the VI loads and press enter. This would require the zero to be highlighted when the VI loads.
Is there anyway that I can format the numeric control to do this?

If you set the key focus of the control to true (Right click on
control->Create->Property Node, then on the property node, select
"Key Focus") before anything else, it should be highlighted when you
run the program.

Set initial value for numerical control

Hello LV users,
I have a VI that is used to initialize some experimental equiptment. It passes on a cluster of ten or so numerical control DBL integers as parameters. Everytime I open the programe the values are reset back to zero and I have to enter the values back in. Is there any way to set default values for the controls so I do not have to change them everytime I open the program.
Thanks
Solved!
Go to Solution.

Wowden,
If you want to set default values for multiple numeric control's in your cluster in one go,
-Type in the desired default values
- Right click on your cluster, browse to 'data operations'
- Choose 'Make current values default.
Similarly, if you need to set defaults for multiple clusters or multiple controls on your front panel,
- Choose 'Edit' in the menu
- Choose "make current values default' (This sets defaults for all controls/constants etc. in one go)
RaVI

How to stop text labels on numeric controls from disappearing

Got a nuisance problem I'd like to correct. When I've got a previously defined numeric control (such as a slide or knob) with text labels, upon entering the control properties window and selecting the "text labels" tab, the first label defaults to clear/empty. This is a nuisance because the text has to be retyped every time when modifying the text labels. Is this a bug or a feature? Is there any way to turn it off? Thanks.

"I've always wanted to be the first to discover a bug in a new LV release! "
Thank you for sharing that with us. You are helping to make LV even beeter than it is.
regarding your quote "I've always wanted to be the first to discover a bug in a new LV release! "
Please see the LabVIEW Champions Blog titled "The Leaders Lead" that can be found here.
http://forums.lavag.org/blog/champions/index.php?
How is your nose?
Ben
Ben Rayner
I am currently active on.. MainStream Preppers
Rayner's Ridge is under construction

Numeric control error handling

Hi all,
I have two question about numeric control.
1) "How to handle invalid inputs?"
Let say, I have one numeric control that can only accept 0 to +inf (Range). So negative input will be invalid data input. Whenever I typed the negative value on it, this control automatically changed back to default (min) value. What I want is that. Is there anyway to detect invalid user input? So that I can program whenever user input negative number, it will automatically change back to previous valid input (not default value).
2) "How to assign the dynamic range of numeric control?"
I used property node to assign the range but my problem is that. I assigned min 0.1, max 1.2 and increment 0.1 but I cant able to select 1.2 or sometime 0.1 by using increment/decrement arrow. Maybe because of floating points? And also I want to do when user input overrange value (eg.1.3) by typing, the value should go back to previous valid input.
Any idea? Thanks

You can choose how LV will react on entries exceeding a limit. The default is, that LV coerces the value to the limit. But you can also ignore the limit and the user can enter any value.
Nevertheless, if you ignore the limits, you always have to check in your software for invalid values!
Regarding 2) i couldn't reproduce what you described. Maybe you should post a little example....
For the 2nd part of your question, please see my answer above...
hope this helps,
Norbert
CEO: What exactly is stopping us from doing this?
Expert: Geometry
Marketing Manager: Just ignore it.

Dynamically set the upper limit of a numerical control

I want to dynamically setting the upper limit of a numerical control. The maximal value that is allowed to input is calculated by the code, so that if the value input by the user exceeds the upperlimit, a warning comes out and the input value is automaticaly reset to zero.
I wired the calculated upper-limit to the property node of the numerical control using ''Data Range > Maximum" property, but it does not work as I expected.
Anyone has suggestion on this? Thanks a lot.

Can you attach your code?
Dejun wrote:
... but it does not work as I expected.
I cannot read your mind. What do you expect? What to you see instead?
Overall, you are in a catch22 scenario if I understand you right. If you set the max of the control to coerce to a certain value and you enter a larger value, it will be coerced to the upper limit and the code does not see the original out-of-range value and you cannot successfully test it with a comparison operation. Maybe you can set it to "ignore" instead of "coerce" or not even set an upper limit. Simply use "in range and coerce" and reset the value under the desired conditions (e.g. via a local variable) before handing it to the rest of the code. You could even wrap this into an xcontrol.
LabVIEW Champion . Do more with less code and in less time .

How to Define Limit to Numeric Control

Dear all,
I am controlling a motor which is pressing to load cell. I am controlling the motor position with a numeric controller in the front panel, the question is when i accidently enter a large value(undesired motor's new motor position), than it could damage the load cell.
In this case : Can we arrange a numeric control in the front panel so that it can accept numbers only between "0" and "10".
Also : Is it also possible to arrange this from block diagram with wiring reference element as maksimum limit to the numeric control ?
Kind Regards,
Best Wishes.

Right click on your numerical control, go to properties, click the 'Data Entry' tab. Un-tick 'Use Default Limits'.
You can now set Minimum, maximum, Increment etc.
This can be done with a property node too if you want to change the values programatically.
Attachments:
dataentry.png ‏41 KB

Use scripting to create numeric control without inc/dec button

I'm having fun using scripting to do things that were formerly "impossible", such as creating a cluster programmatically from a list of variable names and their associated types (to be used in a subsequent program).
When I create a numeric control on a Front Panel, it has the Increment/Decrement button visible, by default. I wanted to create controls without this feature, but I couldn't figure out how to do this (or even if it is possible, though I don't see why not).
Any ideas?
BS
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Go to Solution.

DFGray wrote:
Create it, then set its Increment/Decrement Visible property to FALSE. This property is specific to digital numerics, so you need a digital numeric reference to make it work. The property is all the way down on the end of the list.
Good thing I read this three or four times before writing my snarky reply!
When I created the new VI Object, I made it a Numeric with style Numeric Control (modern). When I scrolled down the list of properties, they stopped with Unit Label -- in particular, Increment/Decrement Visible wasn't listed. Of course, if I just "lay down" a numeric control, this property is visible.
So I played around a little more. I saw somewhere a reference to the "Numeric Object class", and you refer to "digital numerics" (??? aren't all numeric "digital"?), so I went looking. I found a sub-class of Numerics called NamedNumeric -- not sure what that is, exactly, but what do you know, it has the Increment/Decrement Visible? property!
Time to give it a try ...
BS

Numeric Control - Text and Background Color changes when operating inc/dec arrows

Hi,
I'm developing an application that has a panel with black background and green or red numbers. I've added numeric controls and configured the text color and text background color attributes accordinglingy. I set the numeric control to hot or validate control mode and show the inc/dec arrows, since I want to be able to incr/decr the numbers.
The problem is that when I run the application and I hit the inc/dec arrows, then the colors inside the numeric control frame become inverted: the black background becomes white and the green number becomes cyan. I've created a callback function assosicated with the numeric control and tried forcing the text and background color, in the EVENT_VAL_CHANGED section, using the SetCtrlAttrribute() function, but to no avail. Also added ProcessDrawEvents didn't help.
When I mouse click again outside the numeric control, then it reverts back to its original colors (green text, black background).
Any suggestions as to how I can fix this ?
I want it to keep its original colors at all times, even when I'm clicking the incr/decr arrows...
Kind regards,
pgriep
Solved!
Go to Solution.

Ok, now I see what's happening.
The effect you are seeing is a resul of standard numeric control behaviour combined with the black bcakground: when you use arrows to increment/decrement a numeric control its value will be automatically highlighted; on the default background you'll see the white area and figures highlighted in black (white numbers on balck background). If you set the background to black the system will automatically change the colors used to highlight the text, and that's what you're seeing.
By the way, this does not happens if you use up and down keys on the keyboard: text is not highlighted so colors are not changing.
Additionally, this is not only valid for numerics: see the behaviour of the string controls on the bottom of your panel when you tab up to them. This effect does not happen on controls set as indicator like the big clock in the upper part of the panel.
The only way I can see to overcome this behaviour is to hide control built-in arrows and create your own up and down buttons with which you can manipulate the numeric control. I am attaching a modified version of your project with buttons on the left numeric; sorry for the poor aesthetic: I have used some arrow icons I had on my disk, you may want to create your own arrows with the colors and shape you prefer.
Proud to use LW/CVI from 3.1 on.
My contributions to the Developer Zone Community
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Attachments:
ModifiedApplication.zip ‏9 KB

Imaq image control (Delete default Value)

I have a problem with the vision imaq image control.
I have defined for a "imaq image control" a default image for the development.
Now the default image is no longer need and i want to remove the default value an reset the Control to an empty image.
How can i reset the default Value from the "imaq image control" to an empty image?
Solved!
Go to Solution.
Attachments:
imaq_image.vi ‏2726 KB

Cardinal1664 wrote:
I have about 20 Vi's with imaq image controls with default images!
I don't want to too that progmaticaly!?
Another possible way is to automate this task, something like this:
Just obtain list of VIs where Vision Control should be resetted to default, then run snippet above in the cycle.
Andrey.
Attachments:
Empty Images.vi ‏17 KB

I can't save a data value of 1E-5 obtained from a numeric control.

Could please somebody help me. I am saving data (using a USB 6009) from numeric controls in a CSV file. However I realized that very small data values e.g 1e-5 can't be written in the file. Why and how can I overcome the problem?
Thanks in advanced

Hi Thor,
you should use a proper format string!
Default is "%.3f" which only allows 3 digits precision. Use something like "%.6g" - other format codes can be found in the context help...
Best regards,
GerdW
CLAD, using 2009SP1 + LV2011SP1 + LV2014SP1 on WinXP+Win7+cRIO
Kudos are welcome

How can I change the numeric and enum default values in a Strict Type Def Cluster?

I have a Strict Type Def cluster that contains 10 Numerical controls and a number of enums. I have edited default values of the numerical controls in the Strict Type Def, in customize mode, performed a "Make Current Values Default" and have done a "Apply Changes" and saved.
This cluster is used in various locations throughout the project and have not found a way to make the cluster default values change downstream. The Strict Type Def (STD) Control appears to have the right values on the front panel. But if I place an instance of this on a blank front panel, and run a wire from it in the block diagram with a probe and indicator, I still get the old default values being passed from the STD.
Solved!
Go to Solution.

There Are No Strict Type Definition Constants
"Even though typedefs only update when types change, instances get cosmetic changes from the definition whenever they update. So one trick to "push" changes to typedef instances is to change the data type, apply changes, and then change the data type back. [edit, March 26 - Note that the typedef instances need to be in memory when you use this trick]."
From Eyes on VIs, here.
http://blog.eyesonvis.com/
I love this article.
Jim
You're entirely bonkers. But I'll tell you a secret. All the best people are. ~ Alice

I am going to sell my second generation ipod touch, so i resetted it to factory defaults. It said it would take up to an hour, and i patiently waited. But when the black and white loading bar completed, the ipod went to the black screen with an apple logo

I am going to sell my second generation ipod touch, so i resetted it to factory defaults. It said it would take up to an hour, and i patiently waited. But when the black and white loading bar completed, the ipod went to the black screen with an apple logo on it. Sounds about right, right? But now, there is a processing circle on top of the logo, but the circle spins once, and stops at about halfway to the bottom. It just stays there, and about every half to one hour it becomes a white screen and starts all over again. (not the loading bar part, just the circle). I've tried holding the power and the home button, and it works, but it just goes back to the circle screen with the apple logo. HELP PLEASE?

Try:
- iOS: Not responding or does not turn on
- If not successful and you can't fully turn the iPod fully off, let the battery fully drain. After charging for an least an hour try the above again.
- If still not successful that indicates a hardware problem and an appointment at the Genius Bar of an Apple store is in order.

Reset numeric control to default

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