Time a boolean value

I am reading the status of 10 lamps from a serial string. My VI
returns a boolean value according to the status of the lamp. Now I
need to time the on time of each lamp. As soon as a lamp turns off it
should save the time and start adding the time again once the lamp
comes on again. Once the VI is closed and reopend the on time should
appear in the VI for each lamp. And once a lamp comes on it should
start adding to that time. I should also be able to reset the time and
I should also be able to enter a number of hours that a lamp has been
on already. Any suggestions ? Thanks

Hello wv,
do you want someone to develop a program for you? Then you have to pay him/her :-)
Some hints: Make an array for your time values. To reset a timevalue you just need to clear it. To have an offset you just set it in that array. Let the status-vi run in a loop and get the time difference for one loop iteration. Add that delay to the timevalues, if the status of the lamp is on. If you need that timevalues after restarting your VI you should think about a subVI for saving and reading the timevalues.
Best regard,
GerdW
Best regards,
GerdW
CLAD, using 2009SP1 + LV2011SP1 + LV2014SP1 on WinXP+Win7+cRIO
Kudos are welcome

Similar Messages

Time the length of a boolean value then write that value to a file then reset the timer ready for the next time

I have a VI where I need to time the value of a boolean which I use a tick counter in ms which is fine. So when the value is 'true', the timer starts and when the value is 'false' the timer stops and using an indicator I can see in (ms) the duration which the boolean was true. not a problem (see attached).
But what I need is that duration time to be recorded to file, txt doc or what ever/spreadsheet not fussed at the min. but it needs to be stored!
Once it has successfully stored the time, I want the timer to reset to 0 ready to time the next value and recored it, but not write over the previuosly stored time.
Hope someone can please help. thanks (the labview expert) nooorrrrrwwwwt
Attachments:
timing values and writing them to a file.png ‏10 KB

DailyDose wrote: Tick Count is not a timing duration tool....
That's why you subtract the curent from the previous. That will give you the duration you are looking for. It is accurate to the ms. So if that is all the resolution you need, it works wonderfully. If you need more accurate, then use the High Resolution Relative Seconds instead. If your time length is more than seconds, then start looking at using the system timestamp.
There are only two ways to tell somebody thanks: Kudos and Marked Solutions
Unofficial Forum Rules and Guidelines

How to use Boolean values from 2 different sources to stop a while loop?

I am working on a program for homework that states E5.4) Using a single Whil eLoop, construct a VI that executes a loop N times or until the user presses a stop button. Be sure to include the Time Delay Exress Vi so the user has time to press the stop botton.
I am doing this right now but it seems as though I can only connect one thing to the stop sign on th while loop. It won't let me connect a comparision of N and the iterations as well as the stop button to the stop sign on the while loop. So how would I be able to structure it so that it stops if it receives a true Boolean value from either of the 2 sources (whichever comes first)?
Basically, I cannot wire the output of the comparison of N and iterations as well as the stop button to the stop button on the whlie loop to end it. Is there a solution?
Thanks!
Solved!
Go to Solution.

Rajster16 wrote:
Using a single Whil eLoop, construct a VI that executes a loop N times or until the user presses a stop button.
Look in the boolean palette for something similar to the word hightlighted in red above.
LabVIEW Champion . Do more with less code and in less time .

Cell with boolean value not rendering properly in Swing (custom renderer)

Hello All,
I have a problem rendenring boolean values when using a custom cell renderer inside a JTable; I managed to reproduce the issue with a dummy application. The application code follows:
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.lang.reflect.InvocationTargetException;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.logging.Logger;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.SwingUtilities;
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* @author josevnz
public final class SimpleGui extends JFrame {
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          people1.add(3, new Date());
          people.add(people1);
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          people2.add(0, "Yes, you!");
          people2.add(1, 100.522222);
          people2.add(2, Boolean.FALSE);
          people2.add(3, new Date());
          people.add(people2);
          List <Object>people3 = new ArrayList<Object>();
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          people3.add(2, Boolean.TRUE);
          people3.add(3, new Date());
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          people4.add(0, "Peter Parker");
          people4.add(1, 11.567444444);
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          people4.add(3, new Date());
          people.add(people4);
          ((SimpleTableModel) simpleTable.getModel()).addAll(people);
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      * @throws InvocationTargetException
      * @throws InterruptedException
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               @Override
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                    instance.constructGui();
          instance.populate();
}I decided to write a more specific renderer just for that column:
import java.awt.Color;
import java.awt.Component;
import javax.swing.JTable;
import javax.swing.UIManager;
import javax.swing.table.DefaultTableCellRenderer;
* Cell renderer used only by the DividendElement table
* @author josevnz
final class HasItCellRenderer extends DefaultTableCellRenderer {
     protected static final long serialVersionUID = 2596173912618784286L;
     private Color hasIt = new Color(255, 225, 0);
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          super();
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     public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
          Component comp = super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
          int desCol = table.convertColumnIndexToView(1);
          if (! isSelected && value instanceof Boolean && column == desCol) {
               if (((Boolean) value).booleanValue()) {
                    comp.setForeground(hasIt);
               } else {
                    comp.setForeground(UIManager.getColor("table.foreground"));
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      * Override for performance reasons
     @Override
     public void firePropertyChange(String propertyName, boolean oldValue, boolean newValue) {
          // EMPTY
     @Override
     protected void firePropertyChange(String propertyName, Object oldValue, Object newValue) {
          // EMPTY
     @Override
     public void revalidate() {
          // EMPTY
     @Override
     public void validate() {
          // EMPTY
} // end classBut the rendering comes all wrong (a String saying true or false, not the expected checkbox from the default renderer) and also there is a weird flickring effect as this particular boolean column is editable (per table model, not show here)...
I can post the table model and the other renderer if needed (didn't want to put too much code on the question, at least initiallty).
Should I render a checkbox myself for this cell in the custom renderer? I'm puzzled as I expected the default renderer part of the code to do this for me instead.
Thanks!
Edited by: josevnz on Apr 14, 2009 12:35 PM
Edited by: josevnz on Apr 14, 2009 12:37 PM

camickr
Thats because the default render is a JLabel and it just displays the text from the toString() method of the Object in the table model.What I meant to say is that I expected the JCheckbox not a String representation of the boolean value.
Thats because a different renderer is used depending on the Class of data in the column. Look at the source code for the JTable class to see what the "default >renderer for the Boolean class" is. Then you can extend that or if its a private class then you will need to copy all the code and customize it.At the end I looked at the code and replicated the functionality I needed. I thought than maybe there was a way to avoid replicating the same logic all over again in order to implement this functionality. Good advice, though.
see you learned nothing from your last posting. This is NOT a SSCCE. 90% of the code you posted is completely irrelevant for the described problem. There is abosutelly no need to post the custom TableModel, because there is no need to use a custom TableModel for this problem. The TableModel has nothing to do with how a column is rendererd.The custom table model returns the type of the column (giving a hint to the renderer on what to expect, right?) and for the one that had a problem it says than the class is Boolean. That's why I mentioned it:
public Class getColumnClass(int columnIndex) {
    // Code omited....
You also posted data for 4 columns worth of data. Again, irrelevant. Your question is about a single column containing Boolean data, so forget about the other columns.
When creating a SSCCE you don't start with your existing code and "remove" code. You start with a brand new class and only add in what is important. That way hopefully if you made a mistake the first time you don't repeat it the second time.That's what I did, is not the real application. I copy & pasted code in a haste from this dummy program on this forum, not the best approach as it gave the wrong impression.
Learn how to write a proper SSCCE if you want help in the future. Point taken, but there is NO need for you to be rude. Your help is appreciated.
Regards,
Jose.

How to display result set boolean value as a check box

Hi guys,
I am getting the data which include boolean from the database, i need to display the boolean values as check box, see my code, its displaying the data into the table with the boolean values as true and false, how to make it in check boxes
package swing2.org;
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import javax.swing.BorderFactory;
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import java.awt.ComponentOrientation;
import java.awt.event.WindowAdapter;
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import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
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add a
public Class getColumnClass(int col) {
     return getValueAt(0, col).getClass();
}in your ResultSetTableModel which extends AbstractTableModel.
A simple example
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.SwingUtilities;
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Digital waveform to boolean value

Hi, I have a digital waveform and I want to be able to light up an LED on the front panel every time the waveform is high...
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I know there is a vi that converts a digital waveform to a 2D boolean array, but I just want a single boolean value.
Thanks!
Sunny

Hi
In reference to my previous post, you can just leave the inner for-loop, but you have to extract the 4 channels.
Just have a look at the picture.
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Thomas
Using LV8.0
Don't be afraid to rate a good answer...
Attachments:
DigitalWaveform.png ‏6 KB

UCCX 10.5 Scripting: Allowing a CAD Task Button to Change A Boolean Value to Skip a Screen Pop

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Regards
Solved!
Go to Solution.

Rogal wrote:
I need to generate short pulse during changing boolean value from 0 to 1. This pulse is needed to reset counter.
I was trying with Event Structure with Value Change but I think that I did something wrong.
Maybe sambody can give me some tips to do it in other way?
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Regards
We assumed you wanted a pulse when a front panel button (boolean) was clicked.
I am still not sure just what it is you want.
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