visa open and close with "for loops"

[sam009]

Hello everyone

In my program I used two "for loops" which include visa write and read for a RS32 port. it is not possible to close a devise with visa close as the out put is changed to 2D array!!! would you please help me with this error

[crossrulz]

Right-click on the output tunnels to turn off the autoindexing.  If using LabVIEW 2012, then it is "Last Value" for the tunnel type.

[sam009]

Thanks for reply,

It works for "for loop" but what about "event structure loop" still is error for that. 

[GerdW]

Hi sam,

disable indexing of "VISA resource" wire output tunnels in every loop in every (event) case...

Btw.:

- It's no good idea to have events running for long/undetermined periods of time. Really!

- It's no good idea to hide (or even delete?) labels of controls/terminals...

- It's no good idea to start coding with a lot of local variables. They tend to lead to race conditions...

- It's a good idea to clean up a block diagram. It is easier to read then...

[crossrulz]

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@sam009 wrote:

Thanks for reply,

It works for "for loop" but what about "event structure loop" still is error for that. 

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Right-click on the output tunnel and uncheck "Use Default if Unwired".  You will now be forced to wire the VISA Resource through each case.

[sam009]

Dear Gerdw

thanks for reply,

-I put 1000 ms for event stuctre time out if you mean that.

-the labels were hiden for better reading. anyway the progam with full lable is attached.

-just 3 local variables are used do you think it makes a problem.

and sorry I didn't understand what do you mean by disable indexing.

thanks

sam 

[sam009]

I unchecked "Use Default if Unwired" and error is this:

"The type of the source is 1-D array of
VISA session of class.
The type of the sink is VISA session of class."

[RavensFan]

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@sam009 wrote:

and sorry I didn't understand what do you mean by disable indexing.

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You need to do the same thing to the tunnel for the VISA wire on the innermost For Loop that you did for the For Loop that is a couple steps out.

As Crossrulz said in his post "Right-click on the output tunnels to turn off the autoindexing.  If using LabVIEW 2012, then it is "Last Value" for the tunnel type."

[sam009]

Thank both of you,

I did and problem solved. thanks