Simple question of LabVIEW on accountant Boolean signal off structure case

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  Hi, I'm new to LabVIEW, so I suspect that it is propbably quite a simple problem. I'm developing an optical tacometer to a model of gas turbine engine. I have a Boolean signal in labview which is move to a frequency between 4 and 26 Hz. I do need a live display of the frequency of this signal. Does anyone know how I could do this? Any help would be really appreciated! Thank you very much Will be

  This vi should work for you

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  Hello, this is my first time asking your question. I apologize if I post this question in the wrong Council.

  [What I'm trying to do]

  I am stable heating and cooling in an experimental space that I (with cRio9024).

  And I'm putting a different experimental condition in space based on the function 'random number '.

  'Different experimental conditions' sense different combinations of Tind, Twat_s and mdot (refer to the attached VI).

  For example, if I get the Boolean TRUE signal.

  I should have a set of [Tind, Twat_s, mdot] = [21,14,0.05], and IS this set of numbers until this Boolean signal goes to FALSE.

  And when the signal passes to the TRUE once again.

  I should have a different set of [Tind, Twat_s, mdot] = [24,16,0.15] for example.

  [I]

  Problem I am with my code is that,

  When the VI is running, the random number remains the same as the Boolean signal is set to TRUE.

  From what I tried so far for the last couple days, using 'the event structure' was the message more concerned that I found,

  However, LabView help tells me that "structure of the event" on the objectives of the RT do not support the events associated with the user interface such as the façade of VI or controls panels.

  I would therefore ask a quick help, since my knowledge of LabView is exhausted at this point.

  

  This is so the part where I want to generate random numbers, WHEN this structure case is TRUE.

  convert whole numbers, random numbers

  Use them as a table index,

  while I can choose conditions from radom to the given set of conditions.

  Once more, I want to do is,

  generate a SINGLE random number series when the structure above is TRUE.

  Hope I have developed quite clear.

  I'm appreciated for any kind of advice.

  Thank you!

  You just need to store the Boolean from the previous run. Then the logic would be (I'll call her Boolean previous B_prevand current boolean B):

  If B AND B_prev > don't generate new values

  otherwise if B > generate new values

  Edit: to store your Boolean value, you can use a feedback node, or a loop with N = 1 and a registry change.

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  Hey guys,.

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  Hello

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