RSLogix 5000 v15 and later supports integration between PowerFlex drives and ControlLogix using an embedded instance of DriveExecutive software. This requires the drives to be connected using ControlNet or EtherNet/IP.
This function of Drive Executive is included with RSLogix 5000 (it can't be run standalone).
If the drives are networked using DeviceNet, you need RSNetworx for DeviceNet software. I'm not sure how much network functionality you get with old-fashioned RIO and PowerFlex.