MITSUBISHI ELECTRIC 700 Series - Manual (Page 145)

140
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.
(4) The conditions that the comparison operation instructions turn on are as follows.
Classification
Instruction
Symbol
Classification
Instruction
Symbol
Classification
Instruction
Symbol
=
LD =
>
LD>
<
LD<
AND = AND> AND<
OR = OR> OR<
≠
LD<>
≤
LD< =
≥
LD> =
AND<> AND< = AND> =
OR<> OR< = OR> =
ON OFF OFF Dn = K100
98 99 100 101 102
OFF ON Dn K100
OFF ON Dn K100
OFF ON ON Dn K100
ON OFF Dn K100
OFF ON Dn K100