Trying to get rs 232 working on the same machine

Hello

I have a question about using a connection RS-232 in LabVIEW.  I did a search on this subject in the window examples in Help and found the base set file write and Read.vi (it came standard with the IDE).  I read the description at the top (in the yellow box), and depending on how I understood it, I should be able to write to connect RS-232 (COM1, say) and then read it later and display the reading string.  I typed in 10 characters "a" and ran to the app (just before the string "* IDN?") \r\n").  The problem that I had was that the character array was not displayed!  Why?  I swear it worked somehow some time ago.

I don't get an error message, do not see my original message that I typed in.

You connect the transmission line to the receiving line. It's a DB9 pins 2 and 3.

Make a loop do not do much more that check if the port on the pc is functional. Not much good for debugging everything about a real instrument, you may need to connect.

Tags: NI Hardware

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