Panasonic EBL128 Planning Instructions page 75

Fire alarm system
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Panasonic Electric Works Nordic AB
MEW01090
Rev: 3
10.5.3.4
10.5.3.5
This is shown in the following table:
Parentheses
Changes priority order.
a OR NOT (b AND c)=y (This is same as the previous but parentheses
are added, which makes a differance.)
This is shown in the following table:
Control expressions
The AND operator has priority, i.e. a AND b OR c = (a AND b) OR c.
This is perhaps more obvious if you write it: a · b + c.
NOTE! a AND b OR c ≠ a AND (b OR c).
Here follows some examples (and explanations) to show how to build
a control expression with trigger conditions and logical operators:
EBL128 Planning Instructions V1.1.x
a
b
c
y
0
0
0
0
0
0
1
1
0
1
0
0
0
1
1
0
1
0
0
1
1
0
1
1
1
1
0
1
1
1
1
1
a
b
c
y
0
0
0
1
0
0
1
1
0
1
0
1
0
1
1
0
1
0
0
1
1
0
1
1
1
1
0
1
1
1
1
1
73

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