8-12
OR
The OR Link operator links the current statement in Parallel with all previous
statements in an equation (see Figure 8-8).
[ ] [ ] [FIRE] [3-01]
[OR] [ ] [FIRE] [3-02]
Figure 8-8
In Figure 8-8, IF the condition of 3-01 is Fire OR the condition of 3-02 is Fire,
then the INPUT SIDE is true. Another way to look at this equation is shown in
Figure 8-9. In order to cross from the INPUT SIDE of the equation to the
OUTPUT SIDE, one of the statements (3-01 or 3-02) must be true.
03-01
03-02
Figure 8-9
Continued on next page
Custom Control Programming, Continued
Field 1 (continued)
Points 3-01 and 3-02
in Parallel.
One statement or the
other must be true in
order for the output
to have the chance to
turn on.
INPUT SIDE
(Statements 1 & 2)
OUTPUT SIDE
Field 1 Field 2 Field 3 Field 4
FIRST
STATEMENT
SECOND
STATEMENT
3-02
3-01
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