Could you tell me how I can exchange data between a program running on a PC and the PLC via Xserver?
What I'd like to do is periodically send data over the internet from the PLC to a program running on a remote PC, and then have that program send data (updated parameters, say) back to the PLC.
I found info (in the XServer instructions) for writing and reading to a file on a remote PC, but these are PLC-initiated instructions. Can a remote program request information from the PLC? I assume this is what the ExcelLink code does. How do you do this? What are the available commands and syntax?
Thanks in advance.