Hello,
I have a Julabo circulator that I am trying to communicate with using RS232. The problem seems to be the hardware (flow control) handshake that is required. If I use HyperTerminal in windows and choose 4800, even, and hardware flow control everything works fine. But with LabView the options for hardware are RTS/CTS and DTR/DSR, I have tried each and neither work. I know LabView can do it because Julabo’s free utility was written in Labview. But everyone I have talked to in the US says that Germany wrote the code and the do not know how the RS232 communications work. So I am waiting for a response.
In the mean time I have been using a port sniffer to double check what I am sending in LabView against what I am sending in HyperTerminal. The commands look identicle, so I am suspecting that I do not have the hardware handshake working correctly. What is the secret to get the hardware handshake to work? It is a combination of RTS/CTS and DTR/DSR or is it just one or the other? I have been searching the net, NI and here and I cannot find any topics talking about hardware handshaking.
Bryan