"False" statement in case does not occur in case

[tacoman]

Hi,
I've used the basic serial read/write to get some data from a microcontroller.
I had to modify the VI a bit, so I can check to see if the data I receive is either one specific value, or any other value.

My problem is that only the "true"-case occurs. If i receive anything else but '1', nothing happens.
Why does not the "false"-statement occur?

Regards,
Cato

[devchander]

The false case occurs.

Just that when a false condition occurs, you are writing a false boolean value to the false indicator( in the false case). Hence the 'Not OK' LED does not glow

And you are not resetting the True case indicator to false (so the 'OK' LED remains 'ON' once it goes on)

Look at modifications in attached VI

Message Edited by devchander on 03-12-2008 06:04 AM

[devchander]

An Additional information.

Since you seem to be comparing floating numbers, read this link and proceed as suggested

[tacoman]

That was perfect, thanks!

[RavensFan]

Simpler still, you don't need the case structure since the 2 cases have essentially identical code.

Message Edited by Ravens Fan on 03-12-2008 11:01 PM

[devchander]

I had a hunch that I was overlooking some simpler solution

Good one, Ravens

[parthabe]

Dev,

The LLB I downloaded from the link you specified does not open in LV 8.5.

What could be the problem?

[altenbach]

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Ravens Fan wrote:

Simpler still, you don't need the case structure since the 2 cases have essentially identical code.

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Even simpler: delete the "NOT OK" indicator and color the FALSE state of the OK indicator RED. Since you only have 2 possible states, it seems a waste to use two indicators. One LED is enough to handle all possibilities. 😉

[devchander]

Oh,

that LLB was written in LabVIEW 5.0

And those vi's cannot be opened in LabVIEW 8.5

I have put a note to the author of the KB Article, to update theLLB to a more compatible version

Meanwhile, here is the same LLB in LabVIEW 8.0

Sorry for the inconvenience

[devchander]

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Even simpler: delete the "NOT OK" indicator and color the FALSE state of the OK indicator RED. Since you only have 2 possible states, it seems a waste to use two indicators. One LED is enough to handle all possibilities

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And ofcourse, have Boolean Text for indicator as 'OK', 'Not OK'

Message Edited by devchander on 03-13-2008 01:55 AM