b) Cable: Parallelism
Connections of different elements inside an electrical control
cabinet are made with conductors, but these are normally grouped,
forming cables. This technique helps to speed up the building of new
systems and to reduce connection-related bugs. Conductors are
grouped forming cables, and relays are grouped in cards. Array
connectors fasten the connection of relays and cards between them
and with external inputs and outputs. A new element is used in
OOPLC to represent a physical cable: the cable data type, defined as
an array of four conductors, as shown in Figure 2.