10-24-2013 08:28 AM
I have a third party usb-485 interface that we frequently use within our company and want to be able to use Labview to create a program to talk to our systems. The interface is a kk systems usb-rs485 isolated converter which I have been able to recognise in MAX explorer after using the NI VISA driver wizard but I am unsure how to now use it for 485 comms within Labview. I don't seem to be able to detect it with the VISA configure serial port vi. I have used the NI usb-485 interface before and found this quite easy to set up but am not sure how to use this third party interface. I have attatched screen shots of the MAX window to show what it is seeing. Any help would be greatly appriciated.
10-24-2013 12:08 PM
10-25-2013 05:15 AM
I have undone everything as recommended and the comm port does appear in the devices tree but when I try to use the device I don't seem to be able to get any response even though I can select the port as the VISA device name in my vi. I am pretty sure I have the baud rate etc.set the same as when we use the interface in other software,is there something else I need to do? I am using the rs485 example in labview as my code which works with the ni-usb485 we have.
10-25-2013 11:01 AM
There are numerous reasons for a VISA timeout and a serial device. You could have the wrong com settings, the wrong cable, the wrong command, the wrong termination character, etc.