Rockwell Automation FactoryTalk View Site Edition Users Guide - Manual (Page 556)

F ACTORY T ALK V IEW S ITE E DITION U SER ’ S G UIDE
20–10
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Examples: Evaluation order
In the following examples, tag1 = 5, tag2 = 7, and tag3 = 10.
_____________________________
(tag1>tag2) AND (tag1
is evaluated in this sequence:
1. tag1>tag2=0
2. tag1
3. 0 AND 1=0
The expression evaluates to 0 (false).
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tag1>tag2 AND tag3
is evaluated in this sequence:
1. tag2 AND tag3=1
2. tag1>1=1
3 *
/
MOD, %
**
AND, &&
&
>>
<<
4 +
–
OR, ||
|
^
5 EQ, =
NE, <>
LT, <
GT, >
LE, <=
GE, >=
Evaluation order Symbols