Ok Joris, nu kunt ge het afsluiten.
I got the answer from Bronkhorst and after a lot of searching and trying. I added some files, examples and documents I gathered and used. Basically, you have 3 options (from easy to more difficult)
1. Bronkhorst has its own software which you can use as kind of a server for your application. You can comunicate with it using DDE.
2. You can use some dll's from Bronkhorst to talk to their controllers.
3. You can use ascii-code trough a VISA connection. I had to use this option as my laptop doesn't have a serial port and so I used the one on my cRio. Unfortunatly Bronkhorst (and its software) never heard of a cRio and so can't talk to this port. After I figured it out how to set up the communication it was quit simple. You just open a VISA with the right RS232 port, write the Bronkhorst ascii command in the 'write VISA' and read the buffer respons ('read VISA'). The codes are a little complicated, but since I only needed to set the control valve and read the flow, I only needed two codes (and understand the error codes). It's all explained in the Bronkhorst documents, but in the beginning it's not that easy to understand.
So, hope I helped someone else with some Bronkhorst hardware.
I use the RS232-converter, so I can't give you much of advise other than to try different settings. I think you 're best of by contacting Bronkhorst themselves, as you are using their software. They helped me just fine.
How Can i run the 2 VI's at the same time (i mean the VI's with ASCIl for both measureing and setting the control valve.) . Can i run 2 of them from the same Com Port.
Thank u inadvance
How can i run the 2 VI's at the same time.(I mean for request Measure and send set point to the control valve.). can i run 2 of the at the same time from one Comport.
Thank u inadvance
Currently i am doing project which includes Cell voltage Monitoring System(CVM-2582A). Any body who can help me with RS-232 communication.