Newbie needs help on sequence

[aputman]

All other structures hold their outputs until the whole structure is completed.  This one does not.  Each frame within the sequence appears to be considered it's own structure even though they are all linked together in a seemingly bigger structure. 

[CoastalMaineBird]

Why wouldn't you expect one displayed time to show later than the other?  You'd be showing a break to data flow if you showed them being the same general time.

No, you wouldn't. There is no other structure where one output of the structure is available  a whole second before another output of the same structure.

Not one.

[CoastalMaineBird]

 the difference between the two timers is 1000ms which should be expected because there is a 1 second wait between the execution of the first and last state so I am not sure what is unexpected exactly

No other structure can have two (or more) outputs that become available at different times.

Not one.

[CoastalMaineBird]

there is a 1 second wait between the execution of the first and last state so I am not sure what is unexpected exactly

Run it as is, and you see a 1000 mSec difference in the displays.

Convert the FLAT sequence into a STACKED sequence and notice the CHANGE in behavior.

THAT is what is unexpected.

[crossrulz]

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@CoastalMaineBird wrote:

there is a 1 second wait between the execution of the first and last state so I am not sure what is unexpected exactly

Run it as is, and you see a 1000 mSec difference in the displays.

Convert the FLAT sequence into a STACKED sequence and notice the CHANGE in behavior.

THAT is what is unexpected.

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I'm not saying it was the right way to do things, but I do know that this behavior was intende by NI.  I think the main case was if somebody had an output tunnel from frame X being wired to an input tunnel in frame Z.  So each frame of a flat sequence structure is handled as a seperate structure.

[jcarmody]

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@aputman wrote:

So i guess this means that as long as all of the inputs to the next frame are available, it will commence even though all of the code in frame 1 is not complete.  Makes me more leary of this structure.

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That's not correct.  The first frame needs to complete before the second will begin.  It's just that the first will start, as long as all its inputs are avaiable, even if the inputs to the second frame aren't.

[aputman]

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@jcarmody wrote:

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@aputman wrote:

So i guess this means that as long as all of the inputs to the next frame are available, it will commence even though all of the code in frame 1 is not complete.  Makes me more leary of this structure.

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That's not correct.  The first frame needs to complete before the second will begin.  It's just that the first will start, as long as all its inputs are avaiable, even if the inputs to the second frame aren't.

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Yeah i figured that out after i reread the help.  I was reading it incorrectly.

[Mr_M_from_G]

Thank you for this vi. It was very helpful to me.

My experience with LabView help is that it needs a lot of searching to find more than very basic tutorials and good explained examples.

Martin

[RedneckNerd]

Don't forget to mark the thread as solved.

[natasftw]

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@CoastalMaineBird wrote:

Why wouldn't you expect one displayed time to show later than the other?  You'd be showing a break to data flow if you showed them being the same general time.

No, you wouldn't. There is no other structure where one output of the structure is available  a whole second before another output of the same structure.

Not one.

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You're viewing the structure as a single entity.  Why?  That goes against the entire purpose of breaking things into frames to begin with.  It'd be crazy for it to act as you suggest.  Once the frame is over, it's over.  Adding frames is adding a new structure.  Visually, it's easier to see it as the "single" structure.  But, conceptually it's easy to see they're different structures.  You want to harp on the "not one" idea.  How many other structures can you simply add another piece to at the end?  Can you do that with a while loop?  Can you do it with a for loop?  Does the event structure magically add another frame?  No, not one.  The structure with the FSS is the frame.  The output isn't available until the frame completes.  This matches everything else you've seen.  As much as you're a fan of these structures, shouldn't you take the time to understand what exactly it is they're doing?