8-15
Field 2 can be empty or contain the negative operator NOT. NOT is used in
Figure 8-14 to state IF point 3-01 is NOT in a FIRE condition, THEN that
statement is true.
AND & NOT
The AND Link operator links the current statement in Series with all previous
statements in an equation (see Figure 8-14).
[ ] [ ] [FIRE] [3-01]
[AND] [NOT] [FIRE] [3-02]
Figure 8-14
In Figure 8-14, if the condition of 3-01 is Fire AND the condition of 3-02 is
NOT Fire then the INPUT SIDE is true. Another way to look at this equation is
shown in Figure 8-15. In order to cross from the INPUT SIDE of the equation to
the OUTPUT SIDE, the first and second statements must be true.
Note: The NOT gate is shown as a normally closed contact. This
statement is true because there is a path from the Input to the
Output.
18-01 18-02
Figure 8-15
Continued on next page
Custom Control Programming, Continued
Field 2
INPUT SIDE
(Statements 1 & 2)
OUTPUT SIDE
This statement is true because
M1-01 is in the FIRE condition
and M1-02 is NOT in the FIRE
condition.
M1-01
Field 1
M1-02
Field 2 Field 3 Field 4
FIRST
STATEMENT
SECOND
STATEMENT
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