14.29 ESCMP (String Compare: With Storage Area Size)
■
Ladder diagram
■
List of operands
Operand
Description
S1
String 1 to be compared (available range: 0 to 65534; for character constant: 0 to 256 characters)
S2
String 2 to be compared (available range: 0 to 65534; for character constant: 0 to 256 characters)
■
Available devices (●: Available)
Operan
d
16-Bit device:
32-Bit
device:
Integer
Real
numbe
r
St
rin
g
Index
modifie
r
W
X
W
Y
W
R
W
L
W
S
S
D
D
T
L
D
U
M
WI
W
O
TS
C
S
TE
C
E
IX
K
U
H SF
D
F
" "
S1
●
●
●
●
●
●
●
●
S2
●
●
●
●
●
●
●
●
(Note 1)
Only 16-bit devices can be modified. (Character constants cannot be specified.)
■
Outline of operation
● This instruction compares the string specified by [S1] and the string specified by [S2]. The
comparison result is output to the system relays SRA to SRC (assessment flags for the
comparison instruction).
● The size of the storage area is not included in the judgment conditions.
● Comparison flags (system relays SRA to SRC) are operated as follows.
SRA
SRB
SRC
>
=
<
[S1] < [S2]
OFF
OFF
ON
[S1] = [S2]
OFF
ON
OFF
[S1] > [S2]
ON
OFF
OFF
● If the numbers of characters to be compared are different, they are processed as follows.
[S1]
[S2]
"ABCDE"
=
"ABCDE"
“ABCD”
<
"ABCDE"
"B"
>
"ABCDE"
14.29 ESCMP (String Compare: With Storage Area Size)
WUME-FP7CPUPGR-12
14-119
Summary of Contents for FP7 Series
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