Changing Variables in the Structure of the case?

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  Example code:

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• Get the button to change automatically after the structure of the case is completed once.

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  The purpose of this VI (which I lightened it for the purpose of the present) is to do nothing until the START button is true. Then the structure of the case, and the string will be sent to the MSH. I need this too such that the stop command can be sent at any time and will be sent when the STOP button is true.

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  BBRO says:

  The purpose of this VI (which I lightened it for the purpose of the present) is to do nothing until the START button is true.

  Well, your code sends a command to stop immediately after starting the program while consuming all CPU running the inner loop in parallel as fast as the computer allows. (Since there is no dependence on the data, the inner loop and the stop code both run at the same time. LabVIEW does NOT run left to right!).

  All you probably need is a simple while loop, a structure of the event with three cases and all the buttons in the action of locking.

  See attached a simple change, LabVIEW 9.0.

  (And please don't maximise front panel and diagram for full screen, especially if there isn't much here.) Sometimes we want to work on other things at the same time, for example to write this response!)

• SGL and variable U32 are wired to same variable DBL through the structure of the case, block data poster SGL DBL during case U32.

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  Here, I have attached an example, similar code module is used in our project.

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  In your code, 4294967295 is first converted to the SGL (on the edge of the box structure), then to the DBL. But this value may not be exactly converted SGL (due to lack of significant digits).

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• Event Structure... the mouse down or to the cases of change of value

  I feel, it is a simple problem, but I can't seem to find a solution.

  I have a VI that is supposed to communicate with a stepper motor drive.  I'm working on the Boolean setting keys on the Panel before (acting as of the momentary switches) that will jog the hourly engine or counterclockwise, as long as the button is pressed.  Once the user releases the button, the motor should stop jogging.

  I tried to use the mouse down and value change event.  With the help of the mouse down, for some reason, the time-out occurs almost immediately even while holding the mouse on the button.  This translates into what seems like nothing is happening.  Although the engine receives all orders he has to run, it receives the stop command immediately after.

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  Is it possible to cnage my case event to run the way I want to what he... Send commands to the button click on... Send different command button.

  Thank you.

  Thanks for the suggestion...

  I could solve the problem I had.  Previously, I was trying to display the timeout to-1 to a value greater than 0 to launch the timeout on a button release event.  To solve the problem, I just removed all of the code that has been changing the value of timeout and left the default to-1.  I also removed all the code in the case of timeout.  Then, I created a new mouse event that is fired by releasing one of the buttons and copied in the code that used to be in the case of timeout.

  Now, the works of VI exactly as I need to... where an event occurs on a mouse a click of a button and a different event happes when the button is released.

  A very simple solution, however I've only worked in BT for about a week and I have not seen the mouse event when I scroll to the event.

• problem of data flow in the case structures (using a state machine)

  Good day everyone.

  I'm having a problem with the flow of data between the structures of the case.

  I try to use an example of a state machine for this simple problem. but when I try to send data of a box structure to change the State of the code. It will change not in the desirable output, instead, it offers the possibility that the exit options emul.

  could someone please point what I'm doing wrong here. Any kind of help would be very appreciated.

  With a quick glance at your photos a question you have is that you use not data flow. You write your status updated in local variables value. Your State should pass through the case structures are a single wire. Playback of your order "Enum", happened in the register shift on the right side of your loop probably get running and reading before any processing occurs within the structure of your business. That's why you're reading the old value of the State and not the update. or have a classic case of a race condition in your code.

• Value of cluster lost when you leave the structure of the case

  Hi all

  I'm having a problem with a particular VI I'm working. (FYI it's in Labview 8.0)

  The VI is set to run a current source, voltmeter and thermometer, then recording and graph the data in various ways that can be selected by the user.

  Everything seems to work fine except a particular graphic method. When I try to graph current compared to the tension, the current value is lost estates. In a case the current and voltage are combined to form a cluster, and then leave the case structure to be later appended to a table of cluster.

  However, the value of the cluster is lost when the chart is set for the voltage vs. Any other method and it works correctly.

  I can't understand why this is happening as it does not make much sense than other methods of work charts, but this one isn't when it is coded the same exact other than having the different variables.

  I have attached the VI with added indicators showing that the value of cluster is lost once he leaves the box structure. Any help would be appreciated.

  Thank you very much and I apologize for my extremely messy VI.

  -Nathan Cernetic

  You really need to boil this down to something we can run and reproduce the problem.

  Have you tried to break a few relevant connections and rewire? Something is possibly corrupt.

  Besides being a mess, your VI has quite a few glaring errors.

  Let's take a look at the structures at the top right:

  • 90% of the code is the same in all the structures of three cases, so all that needs to be inside the structure is the small part where you built the table 2D. All the rest is outside of the case.
  • The structure of the sequence has no useful function.
  • Why do you need to reverse the table with each iteration of the small loop FOR? Once before the loop would be sufficient. Right?
  • Why you use table built inside the small loop FOR, but no autoindex on the edge of the loop? All you ever get is an array containing exactly one element, no matter how the loop runs. Seems unnecessary! (see below for an alternative image).
  • You wouldn't even need to reverse if you want to use "built the table" instead of "insert into the table at position 0" in the central part.

  

  Other: You constantly hammer all nodes of your property. The only need that will be called when things change. Again, you have far too many cases. For example, in the structure of the case where you are having problems, the same nodes of property exist in all cases. A single instance of the property node belong outside the case and only the string inside each case constants. Whenever the code is the same in all cases a case structure, which code belongs to the outside!

• Difficulties related to the Structure of the case

  Using a structure of the case, I had a problem with the structure of the case. I need the case structure to change a vlue as the case of entry provided.

  However, the entries of cases (boolean) I want to give the structure of the case are '<0' ,="" '="0'," '="">0' here I can provide only structure dealing with > 0 or<>

  How can I include the condition ' = 0' in the case of entry so that the structure of the case ".

  1 decreases the value of the parameter if the case is '<0' >

  2 does not change the value of the parameter if the case is '0',

  3 increases the value of the parameter if the case is ' > 0.

  I've included the VI that I work as an illustration.

  PS - the VI has a selector to change the input variable and has a digital indicator to display the output of the structure of the case variable. Thus, the digital indicator must be constant, if the input variable is not changed.

  Thank you in advance.

  As others have said, you can connect the digital directly to the switch case and create ranges.  Since you'll get weird rounded when using floating point data types, use the function Sign (in the digital palette) to convert your difference in [-1.0.1] and then use this result to the structure of the case.

• How to stop queuing in the structure of the case

  I'm trying to find the Summit and the Valley of the signal. I'm able to find it, but I don't want to make the zero with the pic. I just want to get the value of Ridge and Valley. Is it possible to stop queuing the values in the structure of the case? As I have a several signals which peak/Valley must be found that I can't use the library functions.

  Kanye wrote:

  I'm trying to find the Summit and the Valley of the signal. I'm able to find it, but I don't want to make the zero with the pic.

  First of all, and more which has been mentioned, there are serious shortcomings, making the Subvi is not very universal.

  • Your Subvi does NOT export the correct value of the Ridge (or Valley), but the value just after (which is more a peak or a Valley!)
  
  
  • Your Subvi is only the positive peaks and valleys negative. This seems very restrictive. In general, you could easily have a Valley even if all the data is positive. Right? (With the exception of the Valley of death for example, most of the valleys are above sea level, for example )
  
  
  • Your code is extremely complicated, with two sets of structures of the case, each stacked three deep, four change records and tons of comparisons. Here is a simpler version. (To imitate your outings, place a statement select after each comparison and output the value or zero depending on the result of the comparison).

• Synchronize the case structure with enum update

  Hi, I created a control enum initially with the "First" and "Second" values. In the block diagram, I created a node of this enum control property and it is connected to a box structure. The structure of business allows me to manage the condition "First" or "Second" correctly.

  I then modified the items in my enum so there is now a 'third party '. My problem is that structure business conditions still show as 'First' and 'second '; That is to say, I can't handle the "Third" condition My question is how to synchronize my case structure to show the updated enum values?

  VI, attached, the sample created with LabVIEW 2009 version 9.0f3 (32-bit) running on Windows 7.

  Thank you all for your help in advance.

  Michael O'Shea

  

  First tip: remove the value 'default' first case

  If you have done your VI pauses when you change your enum, which is a good thing.

  Now to synchronize, do a right-click on the border of the structure of the case and select 'add the case for all values', this is the option you are looking for.

  Tone