Problem to talk to an instrument using rs232

Hello,
We are trying to communicate to a ROD-4 (instrument) by using an rs232 link. We have a program from rod-4 on pc and this communicates with the instrument(--> rs232link is OK I suppose) but we can't program everything we want. Therefore we will use Labview to communicate with the instrument(Rod-4). We have made a VI to communicate with the ROD-4 but it doesn't work. Do you want to check the VI I have made to communicate by rs232. Check also the rod-4 maual.pdf on pg 8 and 9, there is standing which program language the rod-4 knows (ascii protocol). The machine(rod-4) answers in the string read with:'' ?\n\r ''what dus this means?
(Using win98se with Labview 5.1)
Thanks.
Attachments:
Bureaublad.zip ‏101 KB

One problem is that you're not sending the stx control character (hex 02). You're sending the text "s", "t", "x". I've attached a picture of a modified VI that should work. Note that I replaced the serial functions that you're using and used VISA commands instead. I'm also curious about something. You said you're using LabVIEW 5.1 but the VI you posted is version 6.1.
Attachments:
serial write.jpg ‏17 KB

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