Hi all,
I am having the problem that I have a USB relay with a USB to serial converter running the FTDI driver, but I cannot get it to switch the relays in Labview (running 8.5). It has 8 relays and I'd like to be able to cycle through them all. I know the board does work, as we have a separate .exe file that will open communication and open/close the relays just fine (It is a simple gui, I thought about trying to use this through Labview, but I don't know the system commands to make it select the relay buttons in the gui). I'd like to be able to do this automatically, and run this as a subVI. My problem is I don't know the commands to make the relays switch, in fact I'm not sure how to check to see if Labview is communicating with the device at all.
I have installed the driver and used the MAX setup to rename the device "USBRelay". I can click on the 'open VISA Test' and this will bring up a dialog box with many different options for changing attributes and writing to the device. If this is open, I cannot communicate with the device through the other .exe program (does this mean it is communicating? or just that the port is currently being used?) When I try to change an attribute, it will sometimes change the current value and sometimes return a long string of hexadecimal, which I'm assuming is an error. So, with all of this, I think it is communicating (verification from anyone? or ideas of how to verify communication?). But now I can't figure out how to actually make it switch the relay. I tried following this post from earlier, but using a string command doesn't accomplish anything.
I'm really stuck and have been looking around on this forum and online for 2 days, but can't figure this out. Any help would be VERY much appreciated.
John
