ABSTRACT
The WorldFIP protocol is an open system, international fieldbus standard (EN50170) and is used to interface to level zero (sensors and actuators) and level one (PLCs, controllers, and so on) devices. It can be used in many different architectures, such as centralised, decentralised and master-slave. The control algorithm can be located within a single processor or can be distributed. Figure 20.1 shows the layers of the WorldFIP standard.
