problems with serial communications

[Shakes]

I am trying to connect an instrument with a serial port to my computer through labview. Instruments responds to function command strings. eg "f23,00; " When using VISA write, only the first charachter of the command string is sent to my instruments. I need to send the full command string at one time. What should be the VI block for this or what am I missing???

[gemstone]

what kind of instrument are u using?I have done such work before.Pls do not use VISA.If u have any question pls give me your E-mail box I'll help u.
Gemstone

[Shakes]

Hi , and thanks for your reply. My e-mail address is abhisheik@hotmail.com.

[Louis Murphy]

What instrument are you using? Have you searched http://www.ni.com/devzone/idnet for an instrument driver? There are many instrument drivers available for download. They make instrument communication a lot easier.

[TommyTestBoy]

If you are unable to find an instrument driver and you are using LabVIEW 7.0, you can try the Instrument I/O Assistant Express VI. It makes instrument I/O and especially response data parsing much easier than writing all the code by hand.

[Shakes]

Thanks but i do not have Labview 7.

[Brian_Powell]

What's wrong with using VISA? It's better (faster and more reliable) than the old "builtin" serial VIs (using "serpdrv").

[Rolf Østvik]

Shakes wrote in news:506500000008000000B6B60000-
1068850981000@exchange.ni.com:

> I am trying to connect an instrument with a serial port to my computer
> through labview. Instruments responds to function command strings. eg
> "f23,00; " When using VISA write, only the first charachter of the
> command string is sent to my instruments. I need to send the full

Problems with handshaking?

Use a property node and the property "Serial Settings->Serial Flow Control"
To check it, read from the property. (To set it, write to the property.)
For me it was default to None, if that is then it is not handshaking which
is the problem.

--
Rolf

[Shakes]

hi rolf, thanks for the reply. I am new to Labview so i will try it and come back to you. Can you give me your e-mail adress so i can send my VI to you for your comments????

[Ray.R]

Shakes,

You can post your vi as an attachment in this thread. That way, many people can help you. 🐵

JLV