Mitsubishi MELSEC QCPU User Manual

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MELSEC-Q/QnA
2 INSTRUCTION TABLES
Table 2.10 Comparison Operation Instructions (Continued)
Category
Instruction
Symbols
Symbol Processing Details
Execution
Condition
Number of
Basic Steps
Subset
See for
Description
LD$=
$
S1 S2
=
AND$=
$
S1 S2
=
OR$=
$
S1 S2
=
• Compares character string S1 and
character string S2 one character at a
time.
• Conductive status when (character string
S1) = (character string S2)
• Non-Conductive status when (character
string S1)
(character string S2)
36-8
LD$<>
$S1S2
< >
AND$<>
$
S1 S2
< >
OR$<>
$S1S2
< >
• Compares character string S1 and
character string S2 one character at a
time.
• Conductive status when (character string
S1)
(character string S2)
• Non-Conductive status when (character
string S1) = (character string S2)
36-8
LD$>
$
S1 S2
>
AND$>
$
S1 S2
>
OR$>
$
S1 S2
>
• Compares character string S1 and
character string S2 one character at a
time.
• Conductive status when (character string
S1) > (character string S2)
• Non-Conductive status when (character
string S1)
(character string S2)
36-8
LD$<=
$S1S2
< =
AND$<=
$
S1 S2
< =
OR$<=
$S1S2
< =
• Compares character string S1 and
character string S2 one character at a
time.
• Conductive status when (character string
S1)
(character string S2)
• Non-Conductive status when (character
string S1) > (character string S2)
36-8
LD$<
$
S1 S2
<
AND$<
$
S1 S2
<
OR$<
$
S1
S2
<
• Compares character string S1 and
character string S2 one character at a
time.
• Conductive status when (character string
S1) < (character string S2)
• Non-Conductive status when (character
string S1)
(character string S2)
36-8
LD$>=
$
S1 S2
> =
AND$>=
S1 S2$
> =
Character
string data
compari-
sons
OR$>=
$
S1
S2
> =
• Compares character string S1 and
character string S2 one character at a
time.
• Conductive status when (character string
S1)
(character string S2)
• Non-Conductive status when (character
string S1) < (character string S2)
36-8
REMARK
1) : The conditions under which character string comparisons can be made are as shown
below
•
Match: All characters in the strings must match
•
Larger string: If character strings are different, determines the string with the largest
number of character codes
If the lengths of the character strings are different, determines the
longest character string
•
Smaller string: If the character strings are different, determines the string with the
smallest number of character codes
If the lengths of the character strings are different, determines the
shortest character string
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Mitsubishi MELSEC QCPU Specifications

General

Brand	Mitsubishi
Model	MELSEC QCPU
Category	Controller
Language	English