Control RS232 handshaking lines directly

[viSci]

A very old DOS legacy system needs to be replaced and it uses the RS232 handshaking lines to drive a solenoid. I seem to remember that I used to have a vi that could set the DTR line directly but cannot find it. Anybody happen to have something like this in an old dusty toolbox?

[JamesMc86]

I think you can do this with VISA. Drop a property node and use Serial Settings>Modem Line Settings>DTR State. It appears to be writable to the assert state. Looks like the only requirement is that they are not used for flow control (Hopefully that can be assumed!)

[viSci]

Thanks I will give that a try.