Error cluster constant appears different in two locations on a block diagram
I am a newbie to LabVIEW. I have taken Core 1 & 2 and Machine Vision and I have not com across this before.
The image on the right is obviously an Error cluster constant used in the block diagram to create an Error cluster and wire it to an error out terminal. As far as I can tell the image on the left is about the same thing, but why does it look different? The different appearance causes raises a concern that there is a difference in behavior that I do not understand. LabVIEW help suggets that both are Error constants. When I create a new error constant, it always ends up appearing like the right image above. I have not been able to create someting looking like the image on the left.
Could someone please confirm what the image on the left is on a blck diagram?
Thanks,
Bill
Solved!
Go to Solution.
The image on the left is an error cluster control. It has a front panel presence and can be set either via the front panel or through a property node or local variable. The image on the right is an error cluster constant. It is a static value.
Mark Yedinak
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Hallo LabVIEWers,
trying to make a good programming style, I implement error cluster inputs
and outputs on each of my VIs very thoroughly.
Now then, if I use eg the VI Server to call my VIs (call by reference node)
I have two error cluster outputs in my data flow, one from the Call by
reference and one from my own VI.
Now my question: How should I handle these two flows, is there a way to or
them together ? Should I ignore one of them ? Should I keep them seperate ?
Wiring the CallByReference output cluster to the own VI's input doesnt't
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LabVIEW style and what are your suggestions ??
Thank you
OliverUnder the Time&Dialog palette
Merge Errors
Lets you merge error I/O clusters from different functions. The function
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through error array in. The first error found is reported. If no errors are
found, the function then looks for warnings and returns the first warning
found. If no error warning is found, the function returns no error.
Click the parameters for more information.
If you're in LV5 you'll just have to implement a similar function.
Oliver Friedrich wrote in message
news:[email protected]..
> Hallo LabVIEWers,
>
> trying to make a good programming style, I implement error cluster inputs
>
and outputs on each of my VIs very thoroughly.
> Now then, if I use eg the VI Server to call my VIs (call by reference
node)
> I have two error cluster outputs in my data flow, one from the Call by
> reference and one from my own VI.
>
> Now my question: How should I handle these two flows, is there a way to or
> them together ? Should I ignore one of them ? Should I keep them seperate
> Wiring the CallByReference output cluster to the own VI's input doesnt't
> work because of cycle dataflow dependancies (of course)! What's a good
> LabVIEW style and what are your suggestions ??
>
> Thank you
>
> Oliver
>
> -
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