U16 Button and delay problems

Hi,
Im a bit new to labview and I was just looking through the examples.
I was confused about what the U16 button is and how you can place this
button on my VI
Also, as a secondary problem I also seem to have a bit of a delay when
using visas to write to a com port. Is this something that is
supposed to happen? I had a similar problem earlier with my NI daq
and i found out that i set the sample rate too high and it would not
output a value until the buffer filled with samples(as far as i can
understand at least). Is a similar thing happening on my VI?

Hi Phil,
why don't you make up your own example? Like the one attached... (Make sure the VISA constant is set to COM1 or the name of your serial port!)
On my computer it takes only milliseconds to run!
Best regards,
GerdW
CLAD, using 2009SP1 + LV2011SP1 + LV2014SP1 on WinXP+Win7+cRIO
Kudos are welcome
Attachments:
Test_Serial.vi ‏24 KB

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