With fieldbus and Ethernet systems, you can increase performance in the case of extended plants with distributed control logic. This allows you to structure systems clearly, or to interconnect multiple networks.
With the appropriate components you can implement a huge range of automation architectures. Furthermore, components are also available which enable e.g. communication between the controllers in the PSS 4000 automation system. These components can also be used to control communication between third-party control systems which are connected to various fieldbus systems.