Silver numeric controls

Hi,
I noticed a small bug while converting some front panels to silver style in LV 2014.
If you replace a numeric control of another style, which has display increment/decrement buttons turned off, with a silver numeric control then the silver control appears with the buttons missing but the thicker boarder where they would be in place. If you cycle the increment/decrement buttons on then off the thick boarder vanishes
e.g replace this modern control (with buttons turned off)

I thought I had but lets try again
Replace this modern control with buttons off
With a silver control to get
Cycle buttons on then off to get

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Sloppy text ... in numeric control

Our software validation folks are banging on my latest app. One of them went to a numeric control and tried to input text. He said it's"weird". I think it looks like garbage. I have never noticed this before. Any way I can get rid of it?
PaulG.
"I enjoy talking to you. Your mind appeals to me. It resembles my own mind except that you happen to be insane." -- George Orwell

PaulG. wrote:
crossrulz wrote:
Yep, you can type anything into a numeric control (silver, modern, classic, and system). But when you hit enter or click out, it goes to 0. I don't know of any way to get rid of this.
No, you can't type "anything". Some of it appears in the control and some of it doesn't. It looks like garbage.
Sorry, any alpha, numeric, plus, minus, period, and/or space.
Probably has something to do with being able to handle all of the formats (hex, exponential, decimal).
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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
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How to create a numeric control (of any type) that can ONLY be increased or decreased by one 'unit' at a time?

As in the title. I wish to create a numeric control (no current limitations on its type) with a range of 1-10 (and a step of 1). The only difficulty I'm having is that the user must only be able to increase or decrease it by 1 at any time. The code initiated by this value change must have completed at least once before the value can be changed again. This is because the VI's code is mostly contained in a while loop, and the control is read once every iteration and its last value must not differ by more than 1.
Is this possible with LabVIEW 6.1 and if so, how?
One of the solutions I've come up with so far is to disable the control immediately after it's read, and to enable it again immediately before it's read for the next time (I have to assume that the user is unable to click twice before the control is disabled). Is this an acceptable method or is there a better way?
I also had an idea of partially disabling a normal numeric control such that it could not be typed in - only the arrows remained operational. However, i don't know quite how to do this.
James
Never say "Oops." Always say "Ah, interesting!"
Solved!
Go to Solution.

Yes, i realize my solution needs the idea that followed it to be feasable in order to work properly. My bad!
I did wonder about using a combination like that, but I hoped it could all be done with one object. Ah well - just means adding an extra little bit of code. No probs.
Thank you anyway.
Never say "Oops." Always say "Ah, interesting!"

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.

Can you use the value from a numeric indicator in a numeric control?

Hi!
I have to develop a code where I have to find the maximum value of a waveform and draw a line at 50% of the value. So I chose to find the amplitude of say 10 cycles of waveforms and found the maximum value out of the amplitudes.
But my real problem is, I have to use the maximum amplitude value that I get from the max. array VI and put it back in program to calculate the 50% value.
So is it possible to use the value from a numeric indicator and put it in a numeric control? Like in MATLAB or C, you give the variable a name and use it later to do any computations. Is it possible to do something similar in LabVIEW?
Solved!
Go to Solution.

Hi!
Thank you very much for taking some time out. I have been trying to do this since 2 months and I am stuck right where I am.
The situation is, I have to calculate the amplitude of the irregular waveform for a few trials and then find the maximum amplitude out of the trials and display a line at whatever % of amplitude the user chooses. I tried using property nodes but I am getting Error 1055 for some unknown reason. Then I decided to draw the line using DC offset but it turns out it calculates the amplitude each time and so the line keeps dancing everytime. Now my challenge is to have the amplitude calculated for say, 20 loops and then calculate the max from that. I ran out of ideas so I am posting here. I am using LabVIEW version 8, and I'll upload a few of my attempts. I hope I am not troubling you'll much.
Attachments:
amplitude display.vi ‏217 KB
amplitude display 1.vi ‏148 KB
Using property node.vi ‏56 KB

Programatically bring the cursor to a numerical control while VI running

Does anyone know how to programatically move the cursor to a particular numerical control while a VI is running?
I have a VI that polls the user for information, and at one point, the user has to repeatedly type numbers into the same numerical control and press enter. For a number of reasons, it is awkward to be messing with the mouse during this particular test. Each time the user presses a paricular button to send data a to file (which I have linked to the Return key on the keyboard by means of 'key navigation'), I would like the cursor to jump to the relevant numerical control ready for the next number to be entered on the keyboard. Does anyone have any ideas how to do this?
I have set up a separate key navigation for thenumerical control in question, so if the user presses the Esc key, this control becomes active and the cursor is in place, but I would like to move the cursor there without this extra user button press if at all possible.
Regards,
Will

Will
I'm not sure if this is what you are looking for but it might do what you need.
On the block diagram right click the control in question >>create>>property node>>key focus. Now right click the property node and select Change to write. Wire a boolean true constant to it and place this snippit in the appropriate place(s) in your code depending upon your architecture.
Hope this helps.
Using LabVIEW 2010SP1 and TestStand 4.5

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!

With Traditional NI-DAQ Compatibility VI's the acquisition locks when I press the increment or decrement button of a numeric control.

Hello all.
I´m using a PCI-6220 and the Traditional NI-DAQ Compatibility VI's to make the acquisition that is in the attached VI. But when I click the increment/decrement button on the numeric controls my acquisition stops. In the same PC I made the same experience with a 6040 and I could not see this problem. I tried with the PCI-6220 with the DaqMX VI's and I could not see this problem too, for these reasons I believe that the problem has something to do with the Traditional NI-DAQ Compatibility VI's.
I built machines that can have one or the other board (depending if it is low-end or normal). Does somebody knows the solution for this problem?
Thanks in advance.
Paulo Carmo
Attachments:
experiencia.vi ‏49 KB

Hello
For what I’ve seen on National web site, using the “Traditional compatibility VI’s”, it sould be possible to control a NI-DAQmx using code written in NI-DAQ Traditional. This information was obtained from the following NI link:
http://digital.ni.com/softlib.nsf/954feaeea92d90918625674b00658b83/9d67f671bcc6850586256e630059308b?...
Please read this information and then tell me something please.
Best regards!

The acquisition locks when I press the increment or decrement button of a numeric control

Hello all.
I´m using a PCI-6220 and the Traditional NI-DAQ Compatibility VI's to make the acquisition that is in the attached VI. But when I click the increment/decrement button on the numeric controls my acquisition stops. In the same PC I made the same experience with a 6040 and I could not see this problem. I tried with the PCI-6220 with the DaqMX VI's and I could not see this problem too, for these reasons I believe that the problem has something to do with the Traditional NI-DAQ Compatibility VI's.
I built machines that can have one or the other board (depending if it is low-end or normal). Does somebody knows the solution for this problem?
Thanks in advance.
Paulo Carmo
Attachments:
experiencia.vi ‏49 KB

Hello
For what I’ve seen on National web site, using the “Traditional compatibility VI’s”, it sould be possible to control a NI-DAQmx using code written in NI-DAQ Traditional. This information was obtained from the following NI link:
http://digital.ni.com/softlib.nsf/954feaeea92d90918625674b00658b83/9d67f671bcc6850586256e630059308b?...
Please read this information and then tell me something please.
Best regards!

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.

How to get y axis value(in a numeric control) by providing x-axis value using wave graph

Hi,
I'm new here, Sorry if i have selected wrong Location.
I want to get Y-axis value (in a numeric Control) by providing X-axis Value using Wave graph.
i want to do calculations with the obtained value.
i have attached File and Snapshot.

Well, you are using the Dynamic Data Type, which I almost never use, but if you convert the data to a WaveForm (using From DDT on the Signal Manipulation Palette, which is a choice when you right-click on the DDT Wire), you should be able to do this. Do you know about how Waveforms are stored? They are a Cluster, with t0 being a TimeStamp for the start of the Waveform, dt being the time step, and Y being the samples. So if you want a point at 0.5 seconds and dt is 0.001, you would pull out the point at Index 499 (offset 0) from the Y array.
Bob Schor

Drag and drop data from Numeric Control or Numeric Array to excel file

I have two inquirries about drag and drop:
1. How to drag and drop data from a Numeric Array or Numeric control to excel file
2. How to drag and drop data from a Numeric Array or Numeric control to an Numeric array Indicator?
The item 2, I tried it with the event structure, but it didnt work.
Please do reply.
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There are very good drag and drop examples that ship with LabVIEW. Have you looked these over to see if they can be modified for your needs?
Matthew Fitzsimons
Certified LabVIEW Architect
LabVIEW 6.1 ... 2013, LVOOP, GOOP, TestStand, DAQ, and Vison

Range of number in numeric control

hi, im new to this program and im trying to generate a range of number (ex. 5.0 1.0 0.25 and 0.10) using a numeric control. can anyone please shed some light? thanks.

It is not entirely clear what you really want, but you could just create an array control showing 4 elements. For that, you would first drop an array container on the front panel, the drop a suitable numeric control inside it. Now resize the container (horizontally or vertically) to show as many elements as you want.
On the block diagram you would get a 1D array terminal.
Message Edited by altenbach on 04-08-2007 07:50 AM
LabVIEW Champion . Do more with less code and in less time .
Attachments:
array.png ‏2 KB

How to change numeric control and indicator radix programmatically?

Hi All,
I need to know how can we change the radix of numeric control as well as numeric indicator while program is running.
Regards,
Pramod M G
Solved!
Go to Solution.

Right. Sorry Display Format -> Format
Jim
You're entirely bonkers. But I'll tell you a secret. All the best people are. ~ Alice

Silver numeric controls

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