Visa test panel works, yet visa write vi does not

[BPile]

Hello all, this is my first post here

I'm trying to communicate with a piezo controller instrument using my serial port.  I can successfully write a command using the visa test panel, 'AV20\r' for example sets all the voltage channels to 20 volts.  In my labview vi, I configure the serial port with the same settings I see in the test panel and run it, yet the instrument doesn't respond.

Any suggestions would be greatly appreciated, I'm sure I must be missing something simple here...

Thanks,

Brian

[RavensFan · Accepted solution]

Are you sure your string constant or control in LabVIEW that contains the string is setup to show \codes mode?

[BPile]

Thanks RavensFan! That did the trick.  Just so I understand what was happening...I was sending the text string \r rather than the hexadecimal representation of the carriage return?

[RavensFan]

Exactly!