Eleft (Takeout Of The Left Side Of A String: With Storage Area Size) - Panasonic FP7 Series Command Reference Manual

14.34 ELEFT (Takeout of the Left Side of a String: With Storage Area Size)

14.34 ELEFT (Takeout of the Left Side of a String: With Storage Area
Size)
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Ladder diagram
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List of operands
Operand Description
Starting device address of the source data (available range: 0 to 65534; for character constant: 0 to
S1
256 characters)
S2 Number of characters to be taken out (available range: 0 to 65534)
D Starting device address to store the result that is taken out
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Available devices (●: Available)
Operan
d
W W
X Y
S1 ● ●
S2 ● ●
D ● ●
(Note 1) Only 16-bit devices, and integer constants can be modified. (Character constants cannot be specified.)
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Outline of operation
● This instruction takes out characters as specified by [S2] from the left side (start of the
character data) of the string specified by [S1], and stores them as string data with storage
area in the device address specified by [D].
● The number of bytes of string data that are taken out is stored in [D+1].
● For both [S1] and [D], the size of the starting storage area must be set by using the user
program before an instruction is executed.
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Processing
Example 1) Taking out the first five characters "ABCDE" from the string
"ABCDE123" to store them as string data with storage area in DT20 and later
[S1]...DT0 [S2]...U5 [S2]...DT20
WUME-FP7CPUPGR-12
16-Bit device:
W W W S D L
R L S D T D
● ● ● ●
● ● ● ●
● ● ● ●
32-Bit
device:
TS TE
U W
WI IX
C C
M O
S E
● ● ●
Real St
Integer numbe rin
r g
D
K H SF " "
Ｕ
F
●
● ●
Index
modifie
r
(Note 1)
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●
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14-133