skip to next frame

[YZ]

Dear all

how can I advance to a next frame in a sequence upon a condition
becoming true in a previos frame? I am waiting for a response from a
serial instrument. If the instrument does not respond, the program sits
there forever. I would like to have some time-out condition, i.e. if no
response for, say, 5 seconds- move to next frame. Something easy 2 do in
a text based language- but how can I do it in labview?

TIA

YZ

[YZ]

YZ wrote:

> Dear all
>
> how can I advance to a next frame in a sequence upon a condition
> becoming true in a previos frame? I am waiting for a response from a
> serial instrument. If the instrument does not respond, the program sits
> there forever. I would like to have some time-out condition, i.e. if no
> response for, say, 5 seconds- move to next frame. Something easy 2 do in
> a text based language- but how can I do it in labview?
>
> TIA
>
> YZ
Thank you, I have figured it out.

YZ

[Joe_H]

YZ,

Sequence structures are not really good for this sort of thing. I would suggest that you use a state machine type architecture. using this type will give you many benefits and is very easy to upgrade and reuse if needed. Look in the example and do a search on the forum for state machines.

[falkpl]

I must agree with joe, anytime I see a sequence a state machine comes to mind, this is a much more flexible solution since you can easily modify the order of a sequence, skip steps by just modifying the transition logic.  I made the change from sequence to state machined about 3-4 years age and havent looked back.  Finite automata is a very well studied and mature design pattern and is easily modeled and implemented in labview.  The only disadvantage to it is that it is a little bit  more conceptually difficult to grasp than a sequence structure. 

Paul