Hi,
I am building a simple VI for communicating with an RS232 instrument. The instrument is old and there is little documentation. But I got it working. Now I am simply trying to add a quick function to the beginning of the VI to detect if the device is physically connected to my serial port (without actually opening the port and initiating communication).
I believe this might be possible by using NI-VISA to check the state of the model serial lines (like DTR / DSR / CTS / RTS). I think I remember hearing that if the RS232 receiver sets one of these lines HIGH, then the sender responds in some way. Any thoughts here?
- John