RS 232 Communications

[gardel]

I am new to Labview and serial communications. I am trying to read data
from a computer running on windows 3.1 to a computer with a win 98 OS. I am
having no luck. I am using the labview VI's. I am looking for suggestions
on how to figure out whats going on.

[Labviewguru]

Go to the Examples Database and open up the LabVIEW Serial example. This will get you started.

Please post if you still cant figure things out. When you do, please be more specific as to the problem you are having.

[gardel]

I have used the both the VISA and Serial Communications VI examples in
LabView with no sucess. I am trying to read ASCII strings from machine
control software on the Win 3.1 computer. I don't know the format of the
strings which is part of the problem.

Question 1 is how can I test the communications between the computers to see
if the serial ports are set correctly? I've seen hyperterminal mentioned,
but don't know what that is.


Labviewguru wrote in message
news:5065000000050000002F650000-1012609683000@exchange.ni.com...
> Go to the Examples Database and open up the LabVIEW Serial example.
> This will get you started.
>
> Please post if you still cant figure things out. When you do, please
> be more specific as to the problem you are havin
g.

[KBersch]

How dou you have the machines connected? If you are using an straight-through serial cable you'll have problems. You need to use a null-modem cable.

Good luck

Kelly

[Dennis_Knutson]

Hyperterminal is a basic serial communications program that comes with Windows. It is found by going to Start>Programs>Accessories>Hyperterminal. You should always start with Hyperterminal before writing your own serial comm program. If you do this, then you can verify your cabling and communication parameters are correct before you have to start worrying whether your software has any bugs.