Input Field 1; The And Link Operator - Simplex 4005 Programming Instructions Manual

Input Field 1

Input Field 1

The AND Link Operator

SECOND STATEMENT
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Field 1 is always empty in the first statement of any Custom Control equation.
In subsequent statements, Field 1 will contain one of the two Link operators:
•
AND – which links the statement in "Series" with all previous statements
•
OR – which links the statement in "Parallel" with all previous statements
The AND Link operator links the current statement in Series with all previous
statements in an equation (see Figure 3-6).
FIRST STATEMENT [ ]
$1'
[ ]
In Figure 3-6, IF the condition of 03-01 is Fire AND the condition of 03-02 is
Fire, then the INPUT SIDE is true. Another way to look at this equation is
shown in Figure 3-7. In order to cross from the INPUT SIDE of the equation to
the OUTPUT SIDE, both of the statements must be true.
INPUT SIDE
(Statements 1 & 2)
Field 1 Field 2
[ ]
Field 1 Field 2
[ ]
Figure 3-6. The AND Link
18-01
03-01
Figure 3-7. An Example of How the AND Link Works
3-5
Field 3 Field 4
),5( 
[ ] [
Field 3 Field 4
),5( 
[ ] [
18-02
03-02
OUTPUT SIDE
Points 03-01 and
03-02 in Series.
Both statements
must be true in
order to go from
the INPUT to the
OUTPUT.
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