profibus and control logix

hi guys, i have a ethernet system on site going to a control logix plc, from this plc we have several field devices currently on flex io moduals. i was looking at putting some of these field devices onto profibus but am unsure on how to connect the profibus network to control logics.

Look at prosoft. We have used prosoft for compactlogix profibus master and profibus slaves for the flex IO.