Basic Instructions; Comparison Operation Instructions - Mitsubishi Electric 700 Series Programming Manual

Basic Instructions

3.26 Basic Instructions
The basic instructions can handle numerical data represented in 16 bits .

3.26.1 Comparison Operation Instructions

(1) The comparison operation instruction is handled as a contact, compares the
magnitudes of two pieces of data (e.g. =, >, <), and turns on when the condition
holds.
(2) Use the comparison operation instructions in the same manner as the contact
instructions of the PLC instructions as indicated below.
• LD, LDI ......... LD=
• AND, ANI ..... AND=
• OR, ORI ....... OR=
(3) There are the following 18 different comparison operation instructions.
Refer to page 142 for details.
Instruction
Classification
Symbol
=
≠
AND<>
(4) The conditions that the comparison operation instructions turn on are as follows.
Dn = K100
Dn K100
Dn K100
Dn K100
Dn K100
Dn K100
140
Classification
=
LD
=
>
AND
=
OR
LD<>
≤
OR<>
98 99
OFF
ON
OFF
ON
ON
OFF
Instruction
Classification
Symbol
LD>
AND>
OR>
=
LD<
=
AND<
=
OR<
100 101
ON
OFF
OFF
ON
Instruction
Symbol
LD<
< AND<
OR<
=
LD>
≥
AND>
=
OR>
102
OFF
ON
ON
OFF
=