Omron C200H-ASC11, Manual, Page: 137 / 301

128
Program Configuration
Section 7-4
Relational Operators Relational operators compare two values. The output is “–1” (&HFFFF) if the
two values are equal and “0” if they are not.
Logical Operators Logical operators perform tests on multiple relations, bit manipulations, or
Boolean operations. The logical operator returns a bitwise result that is either
“true” (not 0) or “false” (0). In an expression, logical operations are performed
after arithmetic and relational operations. The outcome of a logical operation
is determined as shown in the following table. The operators are listed in the
order of precedence.
Relational operator Example Operation
= A
=
B Equal
< >
,
> <
A
< >
B Not equal
< A
<
B Less than
> A
>
B Greater than
< =
,
= <
A
< =
B Less than or equal to
> =
,
= >
A
> =
B Greater than or equal to
Logical Operator Description, Example, and Result
NOT (negation) A NOT A
1
0 0
1
AND (logical product) A B A AND B
1 1
1 0
0 1
0 0 1
0
0
0
OR (logical sum) A B A OR B
1 1
1 0
0 1
0 0 1
1
1
0
XOR (exclusive-OR) A B A XOR B
1 1
1 0
0 1
0 0 0
1
1
0
EQV (equivalence) A B A EQV B
1 1
1 0
0 1
0 0 1
0
0
1
IMP (implication) A B A IMP B
1 1
1 0
0 1
0 0 1
0
1
1