broken wire

[altenbach]

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@cantata2014 wrote:

I just want to close the VISA session. and in the for loop there is a channel sweep

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Disable indexing at the output tunnels or use shift registers. If this is not clear to you, start with some basic LabVIEW tutorials.

You are also looping 200 times with a wait of 5000 seconds between iteration.  Your loop will take over 11 days to complete. There has to be a better way!

[crossrulz]

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@cantata2014 wrote:

I just want to close the VISA session. and in the for loop there is a channel sweep

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If using a FOR loop, use shift registers.

I would change your code to use a state machine instead of the FOR loop.  As Altenbach said, it will take a VERY long time to run that FOR loop.  I'm sure you would like to be able to abort in the middle if something doesn't look right.  So use a state machine where you have a wait case that uses an Event Structure to look for either a timeout (the rate you want to sweep at) or a cancel button's value change.

[cantata2014]

Hello,

I tried to use the data flow, but it still doesn't work... the problem is I don't know where is the problem

CH. PWR. GRID: (registers are different)

[Dennis_Knutson]

You now need to double check of you are correctly writing the protocol. I don't see where you are calculating the crc and appending that.

Do you have software from the vendor? You could use a program such as portmon to capture the traffic and compare it to what you are sending.