How do I use the VISA controls in LabView for windows, to control the RTS and CTS lines of the serial port?

[Rich]

I need to send some data out and then immediatly drop just the RTS line. Then wait for CTS and receive the data back. DTR must be active while all this happens.

[Brian_Vibert]

Did you try using a VISA property node? It appears that you can set RTS and monitor CTS using one.

Brian Vibert
Bristol Babcock Inc.
bvibert@bristolbabcock.com

[Albert.Geven]

With visa properties/modem line settings you can easily select the line setting you need and watch for the other line to change state. use property write and read.
succes
I don't know how immediate the line will change state but you can measure this yourself with an oscilloscope.