Comparison Operation Instructions - Mitsubishi MELSEC A1SCPU Handy Manual

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PROGRAMMING
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Comparison operation instructions
AND-
AND<= ANDs=
OR<>
<= OR<= >=
OR>=
LDDo LDD<= LDD>=
ANDD<> ANDD<= ANDD>=
ORDo ORD<= ORD>=
S I
and
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represent the device numbers which
contains the data to be compared
The comparison operation instructions make numerical magnitude comparisons (such
3s
=,
>>,
<< etc.) between two pieces of data. They are handled as a contact, and turn
ON when the preceding condition is true. The application of comparison instructions is
the same as that of a contact instruction for the corresponding sequence instruction as
indicated below
LD, LDI (LD
=,
LDD =), AND, ANI (AND
=,
ANDD =), OR, OR1 (OR
=,
ORD =)
There are 36 different types of comparison operation, combined in to 6 main groups.
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