462
8 APPLICATION INSTRUCTION
8.8 Character String Operation Instruction
Extracting character string data from the left
LEFT(P)
These instructions extract "n" characters of the character string data stored in the device specified by (s) and later from the left
end (from the start), and store the extracted characters in the device specified by (d) and later.
*1 The LEFT instruction is not supported by the ST language and the FBD/LD language. Use LEFT of the standard function.
Setting data
■
Descriptions, ranges, and data types
■
Applicable devices
*1 T, ST, C cannot be used.
Processing details
• These instructions extract "n" characters of the character string data stored in the device specified by (s) and later from the
left end (from the start), and store the extracted characters in the device specified by (d) and later.
• A character string stored in (s) indicates data stored in devices from the specified device until "00H" is first detected in units
of 1 byte.
Ladder diagram
Structured text
ENO:=LEFTP(EN,s,n,d);
FBD/LD
Operand
Description
Range
Data type
Data type (label)
(s)
Character string or head device number storing a character string
Character string
ANYSTRING_SINGLE
(d)
Head device number for storing "n" characters extracted from the
left of the device specified by (s)
Character string
ANYSTRING_SINGLE
(n)
Number of characters to be extracted
1 to 16383
16-bit signed binary
ANY16
EN
Execution condition
Bit
BOOL
ENO
Execution result
Bit
BOOL
Operand
Bit
Word
Double word Indirect
specification
Constant
Others
X, Y, M, L, SM,
F, B, SB, S
T, ST, C, D, W,
SD, SW, R
U
\G
Z
LC
LZ
K, H
E
$
(s)
(d)
(n)
(s)
(d)
(n)
EN
ENO
s
d
n
00H
00H
b15
b0
b7
b8
b15
b0
b7
b8
(s)
(s)+1
(d)
(d)+1
ASCII code for 1st character
ASCII code for 2nd character
ASCII code for 3rd character
ASCII code for 4th character
ASCII code for 1st character
ASCII code for 2nd character
ASCII code for 3rd character
ASCII code for 4th character
ASCII code for (n-1) th character
ASCII code for (n-2) th character
ASCII code for (n-1) th character
ASCII code for (n-2) th character
ASCII code for (n) th character
ASCII code for (n+1) th character
ASCII code for (n) th character
ASCII code for the last character
Summary of Contents for MELSEC iQ-F FX5
Page 1: ...MELSEC iQ F FX5 Programming Manual Instructions Standard Functions Function Blocks ...
Page 2: ......
Page 17: ...15 CONTENTS ...
Page 24: ...22 MEMO ...
Page 1050: ...1048 26 TIME DATA FUNCTIONS 26 4 Division MEMO ...
Page 1068: ...1066 29 COUNTER FUNCTION BLOCKS 29 4 Counter Function Block Operation error There is no error ...
Page 1107: ...I 1105 MEMO ...
Page 1111: ......