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VISA write timing

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I have a VISA write in a state machine, and the write was a bit slow.  It was taken out of the machine and placed in a seperate VI for timing analysis.  Affter the VISA write was placed in a different VI, the write duration decreased by 1s.  What reasons could have caused it?  Thanks!

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Message 1 of 8
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Not enough information. What sort of physical connection? How many bytes being written? How did you determine the write was the problem? Where's your code?
Message 2 of 8
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...and what is the device at the other end of the wire with which you are communicating?

Mike...

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"... after all, He's not a tame lion..."

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Message 3 of 8
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The instrument is a precise DMM that connects to a GPIB module in a PXI chassis connected to a laptop through an express card.  The command written to the DMM is a string with about 10 characters.  We use a flat sequence structure with the tick node and the 1st and 3rd frame to time the performance of the write node in the 2nd frame.  I don't have the code.  Somebody else is working on it now, but I was pull in to have my brain picked (the NI forum as well).  I am just looking for general advise.  Thank you!

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Message 4 of 8
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Refer to my previous post.  Thanks!

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Message 5 of 8
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Well I'm not going to even try to guess. The fact that someone is working on the program seems a poor excuse. Surely you can pull a copy from source code control.
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Message 6 of 8
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You need to bring the patient in to get a diagosis.

Bill
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(Mid-Level minion.)
My support system ensures that I don't look totally incompetent.
Proud to say that I've progressed beyond knowing just enough to be dangerous. I now know enough to know that I have no clue about anything at all.
Humble author of the CLAD Nugget.
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Message 7 of 8
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ok.  never mind.  He didn't check it into source control.  It is on his PC.  I will let him figure it out or ask it on the forum himself.  Thanks!  

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Message 8 of 8
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