1024
25 CHARACTER STRING FUNCTIONS
25.1 Character String Length Detection
25
CHARACTER STRING FUNCTIONS
25.1
Character String Length Detection
LEN(_E)
These functions detect the length of an input character string and output the result.
Setting data
■
Descriptions, types, and data types
Processing details
■
Operation processing
• These functions detect the length of a character string input to (s) and output the result from (d).
• A value input to (s) is the STRING type data value and within the range from 0 to 255 byte(s).
■
Operation result
1.
Function without EN/ENO
The operation processing is executed. The operation output value is output from (d).
2.
Function with EN/ENO
The following table lists the execution conditions and operation results.
*1 When FALSE is output from ENO, data output from (d) is undefined. In that case, modify a program so that the data output from (d) is
not used.
Operation error
There is no operation error.
Ladder diagram, FBD/LD
Structured text
[Without EN/ENO]
[With EN/ENO]
[Without EN/ENO]
d:=LEN(s);
[With EN/ENO]
d:=LEN _E(EN,ENO,s);
Argument
Description
Type
Data type
EN
Execution condition (TRUE: Execution, FALSE: Stop)
Input variable
BOOL
s(IN)
Input
Input variable
STRING(255)
ENO
Output status (TRUE: Normal, FALSE: Abnormal)
Output variable
BOOL
d(LEN(_E))
Output
Output variable
INT
Execution condition
Operation result
EN
ENO
(d)
TRUE (Executes operation)
TRUE
Operation output value
FALSE (Stops operation)
FALSE
Indefinite value
s
d
EN
ENO
d
s
INT
ASCII code for 4th character
ASCII code for 1st character
ASCII code for 6th character
ASCII code for 5th character
ASCII code for 3rd character
ASCII code for (n)th character
ASCII code for 2nd character
+1
+2
+n
+0
High-order byte
Low-order byte
Character string length
00H (Indicates the end of the character string.)
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 ...
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