Upgrade AC450 to AC 800M
Please consult your regional ABB sales representative.
I don't think its possible to perform a completely bumpless replacement. I believe S100 and AF100 based IO can be connected to AC800 straight over using dedicated CEX bus modules, but other IO (S400, S800, ProfiBus, etc) will need some minor or even major rebuild. Depending on age of existing IO you might want a rebuilt IO solution anyway to come to a preferred and future safe solution.
Last; the application must be converted to fit in AC800. There are several options including making a brand new solution, or to make use of some AC800 application library with similar functionality as in the Advant/Master controller family, eg the Pulp & Paper library.
Do you currently have an 800xA System with Advant Master connectivity? If not it has been our experience to proceed with such an upgrade in a phased approach with the first phase to be an installation of 800xA which will support the current Master products (AC450s) including graphics. This installation can occur in parallel with your existing system. Then the effort is taken to convert or reimplement your AC450 into AC800M controller. This phased is performed "offline" on an engineering system as well as converting the graphic dynamic points to the new AC800M. The types and amount of IO will then be the determining factor on the amount of downtime required to make the switchover to the AC800M controller. We have a lot of experience with these efforts if you wish to contact us for support.