An important aspect of many modern industrial control and automatic systems is the utilised fieldbus

technology.

($($a)$)$ Fieldbus technologies utilises a number of different network access methods. Describe the

operation principle of the three network access methods Token Passing,$,$CSMA/$/$CA and

CSMA/$/$CD.$.$

($($marks 6)$6)$

($($b)$)$ First, explain the differences between FULL−$-$DUPLEX and HALF−$-$DUPLEX communication.

Second, state whether the Controller Area Network ($($CAN)$)$ protocol is based upon FULLDUPLEX or HALF−$-$DUPLEX communication.

($($marks 4)$4)$

An important aspect of many modern industrial control and automatic systems is the fieldbus

technology utilised.

($($c)$)$ The identifier bits of three CAN−$-$bus nodes A,$,$ B and C are detailed in Table Q8$8$c below

Answer rating: 100% (QA)

a Network Access Methods 1 Token Passing In Token Passing a special control token is passed from one ... View the full answer