8-14
OR (first) & AND (second)
In Figure 8-12 the first and second statements are linked in Parallel and the third
statement is linked in Series with the first and second statements. Remember, a
Link operator links that statement with all previous statements, not just the
statement before it.
[ ] [ ] [FIRE] [3-01]
[OR] [ ] [FIRE] [3-02]
[AND] [ ] [FIRE] [3-03]
Figure 8-12
In Figure 8-12, IF the condition of 3-01 is Fire OR the condition of 3-02 is Fire,
AND the condition of 3-03 is Fire, then the INPUT SIDE is true. Another way
to look at this equation is shown in Figure 8-13. In order to cross from the
INPUT SIDE of the equation to the OUTPUT SIDE, the first or second
statements and the third statement must be true.
18-03
Figure 8-13
Continued on next page
Custom Control Programming, Continued
Field 1 (continued)
Points 3-01 or 3-02 (in
Parallel) are in Series with
3-03. 3-01 or 3-02 must be
true and 3-03 must be true in
order to go from the INPUT
to the OUTPUT.
OUTPUT SIDE INPUT SIDE
(Statements 1, 2, & 3)
3-01
Field 1
M1-03
Field 2
M1-02
Field 3 Field 4
FIRST
STATEMENT
SECOND
STATEMENT
THIRD
STATEMENT
Technical Manuals Online! - http://www.tech-man.com
To Next Page
Loading...
