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5.6 Standard Comparison Functions
5.6.1 Comparison
5-177
5
APPLICATION 
FUNCTIONS
GT_E, GE_E, EQ_E, 
LE_E, LT_E, NE_E
GT_E, GE_E, EQ_E, LE_E, LT_E, NE_E
Operation Error
No operation error occurs in the execution of the GT_E, GE_E, EQ_E, LE_E, LT_E, and 
NE_E functions.
Program Example
The program which performs comparison operation between the values input to   and  , and 
outputs the operation result from  .
[Structured ladder/FBD]
[ST]
g_bool3 := GT_E (g_bool1, g_int1, g_int2, g_bool2);
s1
s2
d
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5-178
5.7 Standard Character String Functions
5.7.1 Extract mid string
MID(_E)
5.7  
Standard Character String Functions
5.7.1  
Extract mid string
MID(_E)
Function
Operation processing
(1) Extracts the specified number of characters from the specified start position in the character 
string input to  , and outputs the operation result from  .
The number of characters to be extracted is specified by the value input to n1.
The start position of the characters to be extracted is specified by the value input to n2.
MID(_E)
_E: With EN/ENO
indicates any of the following 
functions.
MID
MID_E
Input argument,
EN:
Executing condition (TRUE: Execution, FALSE: Stop)
:Bit
s(_IN):
Input
:String (255)
n1(_L):
Number of characters to be extracted
:Word (signed)
n2(_P):
Start position to be extracted
:Word (signed)
Output argument,
ENO:
Execution result (TRUE: Normal, FALSE: Error)
:Bit
d:
Output
:String (255)
Process
High
performance
Redundant
Universal
LCPU
Basic
MID_E
(EN, s, n1, n2, d);
ENO:=
Structured ladder/FBD
ST
EN
ENO
s
d
n1
n2
MID_E
s
d
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5.7 Standard Character String Functions
5.7.1 Extract mid string
5-179
5
APPLICATION 
FUNCTIONS
MID(_E)
MID(_E)
(Example) Values input to n1 and n2 are 5
(2) The value to be input to   is string type data within the range from 0 to 255 bytes.
(3) The value to be input to n1 is word (signed) type data within the range from 0 to 255.
(The input value must not exceed the number of characters of character string input to  .)
(4) The value to be input to n2 is word (signed) type data within the range from 1 to 255.
(The input value must not exceed the number of characters of character string input to  .)
Operation result
(1) Function without EN/ENO
An operation is executed and the operation value is output from  .
(2) Function with EN/ENO
The following table shows the executing conditions and operation results.
*1: When FALSE is output from ENO, the data output from   is undefined.
In this case, create a program so that the data output from   is not used.
EN
ENO
TRUE (Operation execution)
TRUE
Operation output value
FALSE (Operation stop)
FALSE
*1
Undefined value
Number of characters to be extracted n1: 5 characters  
Start position to 
be extracted n2: 
5th character
42
H
(B)
41
H
(A)
44
H
(D)
43
H
(C)
46
H
(F)
45
H
(E)
32
H
(2)
31
H
(1)
34
H
(4)
33
H
(3)
00
H
35
H
(5)
46
H
(F)
45
H
(E)
32
H
(2)
31
H
(1)
00
H
33
H
(3)
'ABCDEF12345'
'EF123'
2nd word
3rd word
4th word
5th word
6th word
1st word
2nd word
3rd word
1st word
High-order byte Low-order byte
High-order byte Low-order byte
s
s
s
d
d
d
d
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5-180
5.7 Standard Character String Functions
5.7.1 Extract mid string
MID(_E)
Operation Error
These functions consist of the following instructions.
MID(_E): MIDR
For details of an error which occurs when the function is executed, refer to MELSEC-Q/L
Structured Programming Manual (Common Instructions).
Program Example
The program which extracts the specified number of characters from the specified start position 
in the character string input to  , and outputs the operation result from  .
(a) Function without EN/ENO (MID)
[Structured ladder/FBD]
[ST]
g_string2:=MID(g_string1, g_int1, g_int2);
(b) Function with EN/ENO (MID_E)
[Structured ladder/FBD]
[ST]
g_bool3 := MID_E(g_bool1, g_string1, g_int1, g_int2, g_string2);
s
d
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5.7 Standard Character String Functions
5.7.2 String concatenation
5-181
5
APPLICATION 
FUNCTIONS
CONCAT(_E)
CONCAT(_E)
5.7.2  
String concatenation
CONCAT(_E)
Function
Operation processing
(1) Concatenates the character string input to   to   following the one input to  , and 
outputs the operation result from  .
This function concatenates character string   to   with ignoring '00
H
', which indicates the 
end of character string  .
If the concatenated character string has over 255 bytes, the character string up to 255 bytes 
is output.
(2) The values to be input to   and   to   are string type data within the range from 0 to 255 
bytes.
(3) The number of pins for   can be changed in the range from 2 to 28.
CONCAT(_E)
_E: With EN/ENO
indicates any of the following 
functions.
CONCAT
CONCAT_E
Input argument,
EN:
Executing condition (TRUE: Execution, FALSE: Stop)
:Bit
s1 to s28(_IN):
Input
:String (255)
s2:
Output argument,
ENO:
Execution result (TRUE: Normal, FALSE: Error)
:Bit
d:
Output
:String (255)
Process
High
performance
Redundant
Universal
LCPU
Basic
CONCAT_E
(EN, s1, s2    n28, d);
ENO:= 
Structured ladder/FBD
ST
EN
ENO
s1
d
s2
s28
CONCAT_E
to
s2
s28
s1
d
s2
s28
s1
32
H
(2)
31
H
(1)
34
H
(4)
33
H
(3)
36
H
(6)
00
H
35
H
(5)
'123456'
42
H
(B)
41
H
(A)
44
H
(D)
43
H
(C)
31
H
(1)
45
H
(E)
33
H
(3)
32
H
(2)
35
H
(5)
34
H
(4)
00
H
36
H
(6)
42
H
(B)
41
H
(A)
44
H
(D)
43
H
(C)
00
H
45
H
(E)
'ABCDE'
'ABCDE123456'
2nd word
3rd word
1st word
2nd word
3rd word
4th word
1st word
2nd word
3rd word
4th word
5th word
6th word
1st word
High-order byte Low-order byte
High-order byte Low-order byte
High-order byte Low-order byte
+
s1
s2
d
s1
s2
s28
s
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5-182
5.7 Standard Character String Functions
5.7.2 String concatenation
CONCAT(_E)
Operation result
(1) Function without EN/ENO
An operation is executed and the operation value is output from  .
(2) Function with EN/ENO
The following table shows the executing conditions and operation results.
*1: When FALSE is output from ENO, the data output from   is undefined.
In this case, create a program so that the data output from   is not used.
EN
ENO
TRUE (Operation execution)
TRUE
Operation output value
FALSE (Operation stop)
FALSE
*1
Undefined value
d
d
d
d
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5.7 Standard Character String Functions
5.7.2 String concatenation
5-183
5
APPLICATION 
FUNCTIONS
CONCAT(_E)
CONCAT(_E)
Operation Error
No operation error occurs in the execution of the CONCAT(_E) function.
Program Example
The program which concatenates the character string input to   following the one input to  , 
and outputs the operation result from  .
(a) Function without EN/ENO (CONCAT)
[Structured ladder/FBD]
[ST]
g_string3:=CONCAT(g_string1, g_string2);
(b) Function with EN/ENO (CONCAT_E)
[Structured ladder/FBD]
[ST]
g_bool3 := CONCAT_E(g_bool1, g_string1, g_string2, g_string3);
s2
s1
d
5-184
5.7 Standard Character String Functions
5.7.3 String insertion
INSERT(_E)
5.7.3  
String insertion
INSERT(_E)
Function
Operation processing
(1) Inserts the character string input to   to the specified position in the character string input 
to  , and outputs the operation result from  .
Specify the start position of the character string to be inserted by the value input to n.
After the insertion of character string   to character string  , '00
H
' that indicates the end of 
character string   is ignored. If the character string after insertion has over 255 bytes, the 
character string up to 255 bytes is output.
INSERT(_E)
_E: With EN/ENO
indicates any of the following 
functions.
INSERT
INSERT_E
Input argument,
EN:
Executing condition (TRUE: Execution, FALSE: Stop)
:Bit
s1(_IN1):
Input
:String (255)
s2(_IN2):
n(_P):
Start position to be inserted
:Word (signed)
Output argument,
ENO:
Execution result (TRUE: Normal, FALSE: Error)
:Bit
d:
Output
:String (255)
Process
High
performance
Redundant
Universal
LCPU
Basic
INSERT_E
(EN, s1, s2, n, d);
ENO:=
Structured ladder/FBD
ST
EN
ENO
s1
d
s2
n
INSERT_E
s2
s1
d
s2
s1
s2
5.7 Standard Character String Functions
5.7.3 String insertion
5-185
5
APPLICATION 
FUNCTIONS
INSERT(_E)
INSERT(_E)
(Example) Value input to n is 4
(2) The values to be input to   and   are string type data within the range from 0 to 255 
bytes.
(3) The value to be input to n is word (signed) type data within the range from 1 to 255.
(The input value must not exceed the number of characters of character string input to  .)
Operation result
(1) Function without EN/ENO
An operation is executed and the operation value is output from  .
(2) Function with EN/ENO
The following table shows the executing conditions and operation results.
*1: When FALSE is output from ENO, the data output from   is undefined.
In this case, create a program so that the data output from   is not used.
EN
ENO
TRUE (Operation execution)
TRUE
Operation output value
FALSE (Operation stop)
FALSE
*1
Undefined value
Start position to 
be inserted n: 
4th character
2nd word
3rd word
4th word
5th word
6th word
1st word
32
H
(2)
31
H
(1)
34
H
(4)
33
H
(3)
36
H
(6)
00
H
35
H
(5)
'123456'
2nd word
3rd word
4th word
1st word
High-order byte Low-order byte
42
H
(B)
41
H
(A)
44
H
(D)
43
H
(C)
00
H
45
H
(E)
'ABCDE'
2nd word
3rd word
1st word
High-order byte Low-order byte
42
H
(B)
41
H
(A)
31
H
(1)
43
H
(C)
33
H
(3)
32
H
(2)
35
H
(5)
34
H
(4)
36
H
(6)
44
H
(D)
00
H
45
H
(E)
'ABC123456DE'
High-order byte Low-order byte
Input value to 
s1
Input value to
s2
Output value
d
s1
s2
s1
d
d
d
d
5-186
5.7 Standard Character String Functions
5.7.3 String insertion
INSERT(_E)
Operation Error
No operation error occurs in the execution of the INSERT(_E) function.
Program Example
The program which inserts the character string input to   to the specified position in the 
character string input to  , and outputs the operation result from  .
(a) Function without EN/ENO (INSERT)
[Structured ladder/FBD]
[ST]
g_string3:=INSERT(g_string1, g_string2, g_int1);
(b) Function with EN/ENO (INSERT_E)
[Structured ladder/FBD]
[ST]
g_bool3 := INSERT_E(g_bool1, g_string1, g_string2, g_int1, g_string3);
s2
s1
d
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