Mitsubishi MELSEC iQ-F FX5 series, Programming Manual, Page: 816 / 888

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22 CHARACTER STRING FUNCTIONS
22.1 Character String Length Detection
22
CHARACTER STRING FUNCTIONS
22.1
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).
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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 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 Input Input variable STRING(255)
ENO Output status (TRUE: Normal, FALSE: Abnormal) Output variable BOOL
d Output Output variable INT
Execution condition Operation result
EN ENO (d)
TRUE (Executes operation) TRUE Operation output value
FALSE (Stops operation) FALSE
*1
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
(Indicates the end of the character string.)
ASCII code for (n)th character
ASCII code for 2nd character
2nd word
3rd word
nth word
STRING 1st word
High-order byte Low-order byte
Character string length
00H