How to turn on Flat Sequence Structure based on a Boolean input?

[malbaloo]

Hello,

I trying to write a VI ( attached) that will sample an analog voltage coming through a an analog MUX. I using a flat sequance structure to change the select signals outputs to change the channel being sampled. I am wondering if I can turn on the structure only when my Sample boolean input is TRUE?

[Jacobson-ni]

You can use a case structure with your boolean input as the case selector.

http://www.ni.com/getting-started/labview-basics/execution-structures#Case Structures

The six hour LabVIEW introduction is a great start if you are just getting into LabVIEW.

http://www.ni.com/white-paper/5241/en/

[Dennis_Knutson · Accepted solution]

Based on the image (I can't look at the VI itself), there does not seem to be any need for the sequence at all. You are wiring the DAQ assistant data to two scalar indicators which implies you are taking a single sample. Pointless to acquire multiple samples and discard all but one. The second sequence is certainly useless.

[malbaloo]

Thanks to your comment, I realized that this VI will not do what I want. What I want is this:

if (sample is true)

{

output=00

take a sample

then:

output=01

take a sample

then:

output=10

take a sample

}

Any Idea on how to implement this?

[nyc_(is_out_of_here)]

---

@malbaloo wrote:

Thanks to your comment, I realized that this VI will not do what I want. What I want is this:

if (sample is true)

{

output=00

take a sample

then:

output=01

take a sample

then:

output=10

take a sample

}

Any Idea on how to implement this?

---

Perhaps you should consider studying the online tutorials.  http://www.ni.com/academic/students/learn-labview/

There are no shortcuts to actually *knowing* how to program in LabVIEW.

[Dennis_Knutson]

What does sample= true supposed to mean? What are you going to do with the samples you take?

[Jacobson-ni]

---

@malbaloo wrote:

Thanks to your comment, I realized that this VI will not do what I want. What I want is this:

if (sample is true)

{

output=00

take a sample

then:

output=01

take a sample

then:

output=10

take a sample

}

Any Idea on how to implement this?

---

What kind of hardware are you using for your inputs and outputs?

How much time will you need in between sending your outputs and receiving your inputs?

[Dennis_Knutson]

If you mean the Boolean control, wire it to a case structure or put it inside an event structure.

[crossrulz]

---

@malbaloo wrote:

Thanks to your comment, I realized that this VI will not do what I want. What I want is this:

if (sample is true)

{

output=00

take a sample

then:

output=01

take a sample

then:

output=10

take a sample

}

Any Idea on how to implement this?

---

That sounds like a simple FOR loop with Set Output and Take Sample inside, autoindexing on the output value.

[malbaloo]

Thank you all for your replies.