initialize the Boolean control

Similar Questions

• How to initialize the State of the filter?

  Hello

  In a VI I have continually acquire and filter several different signals (with for example the Butterworth filter or the Butterworth filter point by point). The problem is that whenever I call the filter vi ti eithers begins from a State 0 or state that he had when parsing the previous signal (depending on the Boolean control).

  What I need to do is to read the final State of the filter when it finishes a piece of 'signal' A filtering. Then, the next time I need to filter a piece of the signal, I could feed these values as the initial state to the filter.

  In fact, I opened the VI of Butterworth filter, then inside, I opened the cascade IIR filter inside, and there is shift registers giving access to initial and final of the filter States. But since it's in the Labview libraries, I can't edit them.

  I have also noticed that if I in independent bodies VI of VI for each signal, then each keeps track of its own States. But I have more than 25 different signals (and the number changes all the time) so it's not a viable solution.

  Was the answer, but post here in case someone else has a similar question.

  VI's like filter Cascade IIR with I.C. (initial condition instead of the initial state, that is why I did not before), allow you to initialize the filter and save its State for later. The only thing is you need to do your own coefficients with something like Butterworth Coefficients VI or more. But it is also an advantage, since you do not need to use each iteration time recalculate the.

• void / vi based on the Boolean value

  Hello

  I have a main vi and I want to call a subvi based on a Boolean value, that is when the Boolean entry gets the true value, the sub - vi must run, otherwise it shouldn't.

  To do this, I added the Boolean control component connector of the sub - vi and I added a while loop in the sub - vi, which has 'continue if true' condition. I also made this point prescribed to the subvi.

  However, I noticed that even if the Boolean value false maintains execution of the sub - vi.

  Can you get it someone please let me know what the problem with this approach?

  Thank you

  Despres

  Put the Subvi code (or the Subvi set) inside the true case of a case structure and wire your boolean to that.  I prefer the second option.

  

  

• refnum and the Boolean property nodes

  Hi guys,.

  I have a weird problem where if I create a property node and connect it to the refnum of a Boolean value, I use in my Subvi what happens with the variant data type.

  Now, I know normally it means that the Boolean control is set to a lock rather than a State of the switch. However, even when I configure the refnum of the switch on the Subvi "switch when press ' it still maintains a variant data type.

  Bascially, so what I'm asking, it is, is it possible to get the mode of Boolean data back using these property nodes?

  The main objective of this code must be able to have a "Stop executing" button on the front panel and who put an end to the Subvi, which will run at the time and return to the main program any when that button is pressed.

  The joint screws are written in Labview 2012.

  Bravo guys.

  Hello

  Home screen to the type of data in the control of reference of the Subvi.

  You may have noticed a red dot on the Sub - VI control reference entry in the main VI Boolean node.

  Also attached are the VI.

  I hope this helps.

• Boolean control reset

  Hi all

  Please take a look at my VI

  what I get here is the following

  I have four buttons. User can press one of these 4 buttons to start a routine pattern-block. what I did, is that when the user presses the botton, a string constant is compared to an existing string constants array and then executes the case of vaues. Now, what I'm having the problem is that I've changed the Boolean control "Switch When you press on", now when I press one botton I have to press it again before you press any botton (due to the action of mechinalcal, I chose).  How I can implent a condition that, when I press a botton the previous control resets its self... for example if I first press option 1, then when I press option 2 I donot have to press option 1 option 2. Pressing option 2 should automatically reset option 1.

  I know that more easy way is to use a structure of the event... but the main thing I need is to know how to get the bottonto reset when you press another botton

  concerning

  (Please ignore the above, they have no sense and just complicate matters).

  You want features radio button , place so your four buttons inside a radio button control. That's all!

  Here is a simple example, see if it makes sense.

  (btw: your code is far too complicated for this simple task.) Structures of case one (or zero) should be sufficient. Any UI toplevel loop must also be a small wait)

• Identify the specific control of Cluster in the structure of the event.

  Hello

  Maybe, I did my cluster wrongly mixed in a cluster of design control as seen in the attachment.

  Because of the mixed type, I can not use 'cluster to table' and impossible to identify which is different in a cluster.

  In the structure of the event, I need to make a process of changing values in the cluster.

  But how can I know if the Boolean control is changed or not?

  I would like to start a dialogue for the entry more if the set time is selected.

  labmaster.

  You could do an event to change the value for the Boolean value within the cluster.

• Boolean controls on a Page in a tab control

  Hello everyone.

  I have some problems with a tab control in a fairly complex program implemented by another (more experienced) developer. The basic configuration for this tab control has several tabs to control various aspects of a system (engine installation, video installation, settings, etc.). Go to a specific tab and pressing Ctrl-F8 displays a password prompt, which then displays the menu "Advanced". The Advanced menu is a hidden in the same tab control page. The Advanced menu contains several Boolean controls that allow access to the various advanced features (these pages are also hidden on the same tab control pages), however, none of the Boolean controls work. By clicking on the controls does not cause the button appears pressed, when you run the program as a compiled executable, or while on the face before of the VI in LabView. Hidden pages appear as dark gray. I confirmed that the same is true for all pages hidden in the tab control. I think my problem is with the LabView version that I use. The program is designed in 8.0, while I am currently using 8.2. I was not able to find any references to such a question between the versions, and I'm kinda at a loss on how to address them. Version 8.2 is the only version that I currently have access to, otherwise I would use version 8.0, to see if that corrects the problem.

  Programs that have been previously compiled by the original designer do not work properly (hidden pages, when displayed, appear always dark gray), but even to compile the results of the source code unmodified in the same problems for me.

  Any help you could offer would be greatly appreciated. P.S. I would look at these problems with the original designer, but he's currently on vacation for a month and I want to get this resolved.

  version 8.2

• initialize the control table dimension

  I use LV 2009 SP1 and you want to create a table 1 d of size control fixed.  The elements of the array are a defined group of different controls (enum and boolean) data type.  Control table will reside on a front panel and will be initialized with the values via the software, but the user will have access to change the values of array element (for example, change the enum and boolean controls.  While the user has access to edit the elements of the array, I don't want the user to be able to add new items in the table.  The table must have a vertical scroll bar, given that the number of elements at initialization of the array can be great and also can vary.  I am familiar with the property of the table "Number of lines", but it only controls the number of visible rows in the table.

  Is there a way to set the number of items per program and still have a scroll for the user to index bar using the table, but not add new items?

  Also see the attached screenshot for reference.

  Thank you

  Dan

  I found an acceptable solution through the reading of other forum posts.

  For others, who may find this useful:

  By hiding the display of array index and all the scroll bars, the table can be fixed to the size.  A separate scrollbar is used for the index in the table by writing to the array of Index values property.  The min/max scroll bar may be limited by writing to the Min Doc, Doc Max properties.  I've attached a screenshot of the block diagram.  The value of constant labeled '# lines visible-1' is on the number of items pulled on the panle front less 1 and remains in control of the table of displayiong of the empty elements that allow the user to change.  Also, even if the Page Size property has a value of zero for the scorllbar, which should allow scrolling of the Min Doc to Doc Max, he does not accept it as a valid value and is instead converted to a value of 1.  I introduced a SR on it's a bug because the LV help suggests that the values zero or negative must be acceptable to the Size property of the Page.

  I think it's the solution to the question, although it would be preferable that the size of the table control could be fixed size affecting a property element.  I'll see about adding this title of suggestion.

  Dan

• How to create a custom control for a button where the look apply to everyone else but not the Boolean text?

  Hi all

  I would like to create a button custom as a master, so that if I change the look of the master all other buttons are changed.

  I did it with a custom control, such as a 'type strict def' otherwise the look will change , BUT if I do this as a strict type def I can't change the Boolean text more which should be different on each button.

  How to create a master control of a button where the look apply to everyone else but not the Boolean text?

  Steve Chandler wrote:

  I don't think that you can do. I just looked and as I suspected the Boolean property text is read only for strict typedefs, you cannot use the nodes property to change the text.

  As a just solution make it a typedef. When you want to change the open look the typedef and strict rendering, make your changes, then make no strict again. You will need to update the text Boolean yet once for all instances. Kind of pain. This is perhaps something for the exchange of ideas.

  Alternatively, remove Boolean text and replace with legend

• How is it possible to change the 1 tab to Page 2 and page 3 page, etc. by using a Boolean control?

  Hi Sir,

  I created a 4-page tab control. How is it possible to change the 1 tab to Page 2 and page 3 page, etc. by using a Boolean control?

  Thank you vey much Mr. It worked

• Control the Boolean commands and generate a corresponding digital output

  Hi all

  I'm working on a project of activation of the electrode, here, I thought that how could I order an electrode in a time and generate a digital output of it accordingly. I want to replace it with each electrode with a LED on the front panel and generate a numerical value to each LED on the block diagram.

  If it can be divided into two parts

  1 control the Boolean outputs

  Here, my goal is that if I have 5 leds that are used as a Boolean control, must be ordered so that only one of them lights up at the same time and the rest goes off.

  I mean for example if #3 was turned on and that the user pressed the #3 #2 should be turned off and only #2 lights.

  2. generate the corresponding numerical value

  
  Depending on the position of the LEDs I want to generate a corresponding numerical value, as previously released 3 coming and exit 2 then comes when the second LED illuminates.

  I ask all participants to this group to help me with this.

  Concerning

  Why don't you use the radio button control? You can replace the boxes if you want the buttons.

• the call to dyanamic events for Boolean control with mechanical lock action.

  Hello

  I have two Boolean controls, you don't write operation and another read operation. what I want is, when I trigger a write operation, after it's done you go read the case without user hitting the play button. Please send with a small example and my type of button is to have action mechanical latch. I'm using labview 8.5.

  You are here, sorry about that

• Impossible to implement the ratio control

  I've already posted a question about how to store the values of the previous variables in labview, but do not have all the answers.

  I hope this time I will get some advice or rather the solution.

  I have three parameters A, B and C (they denote percentage values) and their corresponding inidicators. For the first time, the user will give two entries. So the third will be automatically calculated from the sum of the two inputs and subtracting hundreds. Next time, when the user modifies an entry, the other two can get a change. I am facing problem in this part of auto-tuning. In the attached code, I designed the initialization stage in 0th step of the sequence of the battery and the auto tuning part in the 1st stage.

  Now that the three commands are reliable inter, I want to take three reports IE a B/C and c/a. As the total unit is 100, so we'll have a modifed has for various B = 100 - B - C is to say 100-B(1+C/B). Simililarly for a variable, we get updated, C = 100-A(1+B/A) and for the variable C, we get a modifed B = 100 - C (1 + A/C). In the auto part, I am firstly adding all parameters and is assimilating it to the 100. The Boolean result active loop true or false. If the case is true then everything that comes in the control gets displayed in the indicator. If the case is wrong, everything that comes in the control is displayed in the indicator as well as changing the value of the other a variable. Here I am alone to face the problem. I am not able to connect the input with the indicator control.

  It will be a great help if you give me some solutions or advice regarding this problem. I enclose the code that is not yet complete, an approximate overview.

  Thanks in advance.

  I have more LabVIEW 6.1, but here is a simple implementation in LabVIEW 8.2 and a corresponding image.

  Note that there is no case of a single event and the code is scalable. It can easily be adapted to more than 3 orders by developing the entire table and some minor code changes (for example instead of division by 2, divide by "table size - 1").

  Perhaps you can adapt to LabVIEW 6.1...

  

  

• Relay using the temperature control

  Is there a code example using a TC 120 to control PS RLY 420 FP? I am trying to enable / disable a device by using the temperature.

  The first problem with your VI, is that it is not executable for several reasons.  For most various terminals that must be wired which are not.  Click on the broken arrow of race and it will show you these errors.

  I don't think you want to put your Fieldpoint writing in a housing structure.  You should wire the Boolean Fieldpoint write directly.  A true value turns on the relay, a fake he died.

  Another thing that I see in your VI, it is that there is not the channels defined in the Fieldpoint i/o constants.

• How can I trigger a Boolean control from a Boolean indicator?

  Hello

  I want to trigger a Boolean control (like a button) to a true value as soon as my indicator (LED) Boolean Gets a value of true.

  Can someone tell me how to do this?

  You can use either a local variable or a value of property node to define a control value.

  Right-click on the control and create/Local Variable or Create/property/value of the node. Change the property node or a variable to write mode by right clicking on it and selecting "modify to write." Local variables can default to write (do not remember) but I know that failure of nodes of property for the playback mode.

  I prefer the nodes property simply because they have a mistake in and out, so I can control the flow.

  [Edit:] Remember that you must pass instead of locking for the mechanical action. If you need a locking Boolean control and need programmatically set its value, then you need to reset the State after reading using either a local node or property.