Well, it's entirely possible that I'm wrong about a handful of things; the default Node Number is supposed to be 2 on a DH485 model terminal, and it's certainly possible that upload/download was added later to the DH485 terminals Printer Port. RA Tech Support will probably have a more complete knowledge.
General purpose USB/RS232 converters can't run the 1747-PIC/AIC+ driver, under any operating system. That's why the 1747-UIC was built.
You can get to the Configuration screen by cycling power and pressing the white square that appears in the left lower corner of the screen. Then you can scroll down to the Printer Setup item and Disable Printing. When Printing is disabled, the port should be usable for DF1 Full Duplex protocol for Upload/Download. This setting is active immediately; the application program doesn't have any effect when you're in Configuration Mode.
I went to the printer setup item and tried to disable it by touching the button with my finger. I screen responded to my touch but the button still said "Printer enabled" (or something like that). There was no indication that the print function is disabled.
Last edited: