Mitsubishi MELSEC Q Series, Programming Manual

Page: 342 / 816

7-2
7.1 Logical Operation Instructions
7.1
Logical Operation Instructions
(1) The logical operation instructions perform logical OR, logical AND or other logical operations
in unit of 1 bit.
Operation Description
Formula for
Operation
Example
A B Y
Logical AND
(AND)
A bit is set to 1 only when both input A
and input B are 1, otherwise set to 0
Y A / B
0 0 0
0 1 0
1 0 0
1 1 1
Logical OR
(OR)
A bit is set to 0 only when both input A
and input B are 0, otherwise set to 1
Y A + B
0 0 0
0 1 1
1 0 1
1 1 1
Exclusive OR
(XOR)
A bit is set to 0 when input A and input
B are equal, otherwise set to 1
Y A B + A B
0 0 0
0 1 1
1 0 1
1 1 0
Exclusive NOR
(XNR)
A bit is set to 1 when input A and input
B are equal, otherwise set to 0
Y (A + B)(A + B)
0 0 1
0 1 0
1 0 0
1 1 1