I am starting to figure out an upgrade we need to do in one of our in house systems. It has a very old mitsubishi PLC and I would like to upgrade to the QnA PLC. I need it to talk to several FX2n PLCs and I need the ability to add on to the network later. I would like to use CClink, I have used it in the past and found it to be a wonderfull network to deal with. I thought it was proprietary to mitsubishi but by researching it a little more they claim it to be an open network. My question is how open is it? Has anyone used it to talk to a non-mitsubishi device? Where can I find more information about the openness of CClink?