Automating Manufacturing Systems - Process Control and ...

plc boolean - 6.17
6.5 SIMPLE DESIGN CASES
The following cases are presented to illustrate various combinatorial logic problems,
and possible solutions. It is recommended that you try to satisfy the description
before looking at the solution.
6.5.1 Basic Logic Functions
Problem: Develop a program that will cause output D to go true when switch A
and switch B are closed or when switch C is closed.
Solution:
D
=
( A⋅
B) + C
A
B
D
C
Figure 6.15
Sample Solution for Logic Case Study A
Problem: Develop a program that will cause output D to be on when push button A
is on, or either B or C are on.
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