Communication between computers is essential to keep all parts integrated and working at their required specification. Communicating with two or more components within integrated systems is done using an electronic bus. The bus is a communication system which transfers data between components inside a computer. Automation industry comprises of integrated systems which comprise of high-speed data transmission systems also known as Distributed Computer Controlled Systems (DCCS) communications which connect different industrial systems, also known as Fieldbus.
Introduction of Fieldbus
Fieldbus is a composition of two main words. ‘Field’ and ‘Bus’. The word Field is totally related to the industrial environment and the word bus means the electronic path provided for the data to flow. Fieldbus provides a greater advantage over other different types of busses.
Some of its general advantages will be that it has the ability to connect new units on the bus. This means that the network is flexible and has the ability to become easier to achieve. It also reduces the amount of wiring which eventually reduces the cost.
Types of Fieldbus
The field bus is further divided into three main categories which are as follows.
- Controller Area Network (CAN)
Controlled Area Network is a priority bus network, in this protocol any station in which this type of bus can be accessed immediately it becomes idle. It means that as soon as the bus become idle every station attached to the bus will start to transmit data towards that bus. During the transmission of data towards the bus, a collision between two data can occur if having similar priorities.
- Process Field Bus (PFB)
Profibus protocol is a timed-token bus network, this Profibus allows to communicate between the master and the slave. This is a timed communication which allows the master station to communicate successfully with the slave station.