Yokogawa Button Operated MV2000 - Manual (Page 228)

10-8
IM MV1000-01E
Logcal Computaton
Checks whether the two data values, e1 and e2 (e1 only for NOT), are zero or nonzero,
and computes according to each condition.
AND
Logical product
(Syntax) e1ANDe2
(Condition) If the two data values e1 and e2 are both nonzero, the computed result
is 1. Otherwise, it is zero.
(Explanation) e1 = 0, e2 = 0 → e1ANDe2 = 0
e1 ≠ 0 , e2 = 0 → e1ANDe2 = 0
e1 = 0 , e2 ≠ 0 → e1ANDe2 = 0
e1 ≠ 0 , e2 ≠ 0 → e1ANDe2 = 1
OR
Logical sum
(Syntax) e1ORe2
(Condition) If the two data values e1 and e2 are both zero, the computed result is
zero. Otherwise, it is 1.
(Explanation) e1 = 0 , e2 = 0 → e1ORe2 = 0
e1 ≠ 0 , e2 = 0 → e1ORe2 = 1
e1 = 0 , e2 ≠ 0 → e1ORe2 = 1
e1 ≠ 0 , e2 ≠ 0 → e1ORe2 = 1
XOR
Exclusive OR
(Syntax) e1XORe2
(Condition) If the two data values e1 and e2 are zero and nonzero or nonzero and
zero, the computed result is 1. Otherwise, it is zero.
(Explanation) e1 = 0 , e2 = 0 → e1XORe2 = 0
e1 ≠ 0 , e2 = 0 → e1XORe2 = 1
e1 = 0 , e2 ≠ 0 → e1XORe2 = 1
e1 ≠ 0 , e2 ≠ 0 → e1XORe2 = 0
NOT
Logical negation
(Syntax) NOTe1
(Condition) The result is the inverse of the status of data e1 (zero or nonzero).
(Explanation) e1 = 0 →
NOTe1 = 1
e1 ≠ 0 → NOTe1 = 0
Expresson Example
01-02OR03.GT.04
Determines the OR of the computed results of “01-02” and “03.GT.04”.
10.2 Wrtng Expressons