title: Real time communication PC with PLC (protocol?)
body: <p>Basically, I would like to creat my own piece of software something a la communication protocl between PC and PLC.</p>
  
  <p>I would like to read real time values from PLC and display them in a table for example Data Base, OPC table, Excel and write to PLC from PC in real time mode as well. </p>
  
  <p>The whole point is I would like to access this data via ethernet port. How I can do it ? I do not want to use 3rd party software. I want to create something my own. </p>