I have a project which is very old. It's panelview 1200 and PLC5 which connected by DH+, I am not sure why in the plc5 program, there is one rack(RIO) reserved for panelview 1200 (Those alarms are all connceted to this rack, but addresses are internals like N201:1 etc). Before I have done some standard panelview projects which is connected with Ethernet to PLC or SLC, There is no this Rack. If I want to convert to panelview plus. Do I still need this RIO Rack? Do I also change PLC5 program? Thanks.