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CIRCUIT TECHNIQUE
Example 1
Marcowill read (
X
) if he has a newspaper (
a
) and glasses (
b
).
Themathematical rule is:
X= a * b
Marco has a newspaper
a
=
1
he has his glasses
b
=
1
Marco reads
X
=
1
Marco has a newspaper
a
=
1
does not have his glasses
b
=
0
Marco does not read
X
=
0
Marco does not have a newspaper
a
=
0
he has glasses
b
=
1
Marco does not read
X
=
0
Marco does not have a newspaper
a
=
0
he does not have glasses
b
=
0
Marco does not read
X
=
0
Example 2
Luca reads (
X
) if he has a newspaper (
a
) or a book (
b
).
In this case, the required condition is that at least one of the two facts is TRUE, and themathematical rule is:
X= a+ b
Luca has a newspaper
a
=
1
has a book
b
=
1
Luca reads
X
=
1
Luca has a newspaper
a
=
1
does not have a book
b
=
0
Luca reads
X
=
1
Luca does not have a newspaper
a
=
0
has a book
b
=
1
Luca reads
X
=
1
Luca does not have a newspaper
a
=
0
does not have a book
b
=
0
Luca does not read
X
=
0
In pneumatics a valve can be: Open (
1
) or Closed (
0
), this state correlates with themathematical logic, a subject
wewill address later on.
1
2
3
4
5
data
processing
a
C
b
X
c
d
e
C
a
a
b
b
Fig. 38
5
151
CAMOZZI
>
CIRCUIT TECHNIQUE