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5.1 Type Conversion Functions
5.1.29 String type 
single-precision real type conversion
5-87
5
APPLICATION 
FUNCTIONS
STR_TO_REAL(_E)
STR_TO_REAL(_E)
Operation Error
An operation error occurs in the following cases.
• Any characters other than '30
H
' to '39
H
' exist in the integer or fractional part. 
(Error code: 4100)
• Two or more 2E
H
exist. 
(Error code: 4100)
• Any characters other than '45
H
'(E), '2B
H
'() or '45
H
'(E), '2D
H
'() exist in the exponent part, 
or more than one exponent parts exist. 
(Error code: 4100)
• The data after conversion is outside the range of -3.40282
+38 
to  -1.17549
-38
, 0 or 
1.17549
-38
to 3.40282
+38
(Error code: 4100)
• The number of characters is 0 or exceeding 24. 
(Error code: 4100)
Program Example
The program which converts string type data input to   into single-precision real type data, and 
outputs the operation result from  .
(a) Function without EN/ENO (STR_TO_REAL)
[Structured ladder/FBD]
[ST]
g_real1 := STR_TO_REAL (g_string1);
(b) Function with EN/ENO (STR_TO_REAL_E)
[Structured ladder/FBD]
[ST]
g_bool3 := STR_TO_REAL_E (g_bool1, g_string1, g_real1);
s
d
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5-88
5.1 Type Conversion Functions
5.1.30 
String type 
 word (unsigned)/16-bit string, double word (unsigned)/32-bit string type conversion
STR_TO_WORD(_E), STR_TO_DWORD(_E)
5.1.30  
String type  word (unsigned)/16-bit string, double word 
(unsigned)/32-bit string type conversion
STR_TO_WORD(_E), STR_TO_DWORD(_E)
Function
Operation processing
(1) STR_TO_WORD, STR_TO_WORD_E
Converts string type data input to   into word (unsigned)/16-bit string type data, and 
outputs the operation result from  .
STR_TO_WORD(_E)
STR_TO_DWORD(_E)
_E: With EN/ENO
indicates any of the following 
functions.
STR_TO_WORD
STR_TO_WORD_E
STR_TO_DWORD
STR_TO_DWORD_E
Input argument,
EN:
Executing condition (TRUE: Execution, FALSE: Stop)
:Bit
s(_STRING):
Input
:String (4)/(8)
Output argument,
ENO:
Execution result (TRUE: Normal, FALSE: Error)
:Bit
d:
Output
:Word (unsigned)/16-bit string, double word 
(unsigned)/32-bit string
Process
High
performance
Redundant
Universal
LCPU
Basic
EN
ENO
d
s
STR_TO_WORD_E
(EN, s, d);
ENO:=
Structured ladder/FBD
ST
STR_TO_WORD_E
s
d
String type
"0012"
"0000"
Word (unsigned)/16-bit string type
12
H
0
H
s
d
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5.1 Type Conversion Functions
5.1.30 
String type 
 word (unsigned)/16-bit string, double word (unsigned)/32-bit string type conversion
5-89
5
APPLICATION 
FUNCTIONS
STR_TO_WORD(_E), 
STR_TO_DWORD(_E)
STR_TO_WORD(_E), STR_TO_DWORD(_E)
(2) STR_TO_DWORD, STR_TO_DWORD_E
Converts the string type data input to   into double word (unsigned)/32-bit string type data, 
and outputs the operation result from  .
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
s
d
String type
"00000012"
"00000000"
Double word (unsigned)/32-bit string type
12
H
0
H
s
d
d
d
d
d
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5-90
5.1 Type Conversion Functions
5.1.30 
String type 
 word (unsigned)/16-bit string, double word (unsigned)/32-bit string type conversion
STR_TO_WORD(_E), STR_TO_DWORD(_E)
Operation Error
These functions consist of the following instructions.
STR_TO_WORD(_E) : HABIN
STR_TO_DWORD(_E) : DHABIN
In any of the following cases, an operation error occurs, the error flag (SM0) is turned ON, 
and the corresponding error code is stored to SD0.
• The ASCII code for each number specified for   is outside the range of 30
H
to 39
H
, 41
H
to 46
H
.
(Error code: 4100)
• The device specified  for exceeds the corresponding device range.
(For Universal model QCPU and LCPU)
(Error code: 4101)
Program Example
(1) The program which converts string type data input to   into word (unsigned)/16-bit string 
type data, and outputs the converted data from  .
(a) Function without EN/ENO (STR_TO_WORD)
[Structured ladder/FBD]
[ST]
g_string1 :="0012";
g_word1 := STR_TO_WORD (g_string1);
(b) Function with EN/ENO (STR_TO_WORD_E)
[Structured ladder/FBD]
[ST]
g_string1 :="0012";
g_bool3 := STR_TO_WORD_E(g_bool1, g_string1, g_word1);
s
s
s
d
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5.1 Type Conversion Functions
5.1.30 
String type 
 word (unsigned)/16-bit string, double word (unsigned)/32-bit string type conversion
5-91
5
APPLICATION 
FUNCTIONS
STR_TO_WORD(_E), 
STR_TO_DWORD(_E)
STR_TO_WORD(_E), STR_TO_DWORD(_E)
(2) The program which converts string type data input to   into double word (unsigned)/32-bit 
string type data, and outputs the operation result from  .
(a) Function without EN/ENO (STR_TO_DWORD)
[Structured ladder/FBD]
[ST]
g_string1 :="00000012";
g_dword1 := STR_TO_DWORD (g_string1);
s
d
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C# Word - Document Processing in C#.NET
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5-92
5.1 Type Conversion Functions
5.1.31 String type 
time type conversion
STR_TO_TIME(_E)
5.1.31  
String type  time type conversion
STR_TO_TIME(_E)
Function
Operation processing
Converts string type data input to   into time type data, and outputs the operation result 
from  .
STR_TO_TIME(_E)
_E: With EN/ENO
indicates any of the following 
functions.
STR_TO_TIME
STR_TO_ TIME _E
Input argument,
EN:
Executing condition (TRUE: Execution, FALSE: Stop)
:Bit
s(_STRING):
Input
:String(11)
Output argument,
ENO:
Execution result (TRUE: Normal, FALSE: Error)
:Bit
d:
Output
:Time
Process
High
performance
Redundant
Universal
LCPU
Basic
EN
ENO
d
s
STR_TO_TIME_E
(EN, s, d);
ENO:=
Structured ladder/FBD
ST
STR_TO_TIME_E
s
d
String type
"01234567"
"00000000"
Time type
T#20m34s567ms
0ms
s
d
5.1 Type Conversion Functions
5.1.31 String type 
time type conversion
5-93
5
APPLICATION 
FUNCTIONS
STR_TO_TIME(_E)
STR_TO_TIME(_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.
Operation Error
This function consists of the following instruction.
STR_TO_TIME(_E) : DDABIN
In any of the following cases, an operation error occurs, the error flag (SM0) is turned ON, 
and the corresponding error code is stored to SD0.
• The ASCII code for each number specified for   is outside the range of  30
H
to 39
H, 
20
H,
and 00
H
                                                                                                      (Error code: 4100)
• The ASCII data specified for   is outside of the range shown below.
-2147483648 to 4147483647                                                                       (Error code: 4100)
EN
ENO
TRUE (Operation execution)
TRUE
Operation output value
FALSE (Operation stop)
FALSE
*1
Undefined value
d
d
d
d
s
s
5-94
5.1 Type Conversion Functions
5.1.31 String type 
time type conversion
STR_TO_TIME(_E)
Program Example
The program which converts string type data input to   into time type data, and outputs the 
operation result from  .
(a) Function without EN/ENO (STR_TO_TIME)
[Structured ladder/FBD]
[ST]
g_string1 :="01234567";
g_time1 := STR_TO_TIME (g_string1);
(b) Function with EN/ENO (STR_TO_TIME_E)
[Structured ladder/FBD]
[ST]
g_string1 :="01234567";
g_bool3 := STR_TO_TIME_E (g_bool1, g_string1, g_time1);
s
d
5.1 Type Conversion Functions
5.1.32 String type 
BCD type conversion
5-95
5
APPLICATION 
FUNCTIONS
STR_TO_BCD(_E)
STR_TO_BCD(_E)
5.1.32  
String type  BCD type conversion
STR_TO_BCD(_E)
Function
Operation processing
(1) When word (unsigned)/16-bit string type is specified for output argument.
(a) Converts string type 4-character-string data input to   into BCD type data, and outputs 
the operation result from  .
(b) When '20
H
' (space) exists in the character string, the conversion is executed ignoring 
'20
H
'.
(c) '20
H
' (space) and '30
H
' (0) in the character string are counted as one character.
(d) The value to be input to   is string type data within the following range.
ASCII code: '30
H
' to '39
H
', '20
H
', and '00
H
'
STR_TO_BCD(_E)
_E: With EN/ENO
indicates any of the following 
functions.
STR_TO_BCD
STR_TO_ BCD _E
Input argument,
EN:
Executing condition (TRUE: Execution, FALSE: Stop)
:Bit
s(_STRING):
Input
:String (8)
Output argument,
ENO:
Execution result (TRUE: Normal, FALSE: Error)
:Bit
d:
Output
:ANY BIT
Process
High
performance
Redundant
Universal
LCPU
Basic
EN
ENO
d
s
STR_TO_BCD_E
(EN, s, d);
ENO:=
Structured ladder/FBD
ST
STR_TO_BCD_E
s
d
String type
'9999'
Word (unsigned)/16-bit string type
9999
H
s
d
s
5-96
5.1 Type Conversion Functions
5.1.32 String type 
BCD type conversion
STR_TO_BCD(_E)
(e) When input character string has less than 4 letters, convert it with 4 letters 
supplementing with 0 to the end of the character string. Therefore, when converting 
character string ("0001" for "1") with less than 4 letters to BCD data, input the zero 
padding character strings. 
(f) When the character string has more than 4 letters, the conversion target is the forth 
character from the left of the character string data.
(2) When double word (unsigned)/32-bit string type is specified for output argument.
(a) Converts string type 8-character-string data input to   into BCD type data, and outputs 
the operation result from  .
(b) When '20
H
' (space) exists in the character string, the conversion is executed ignoring 
'20
H
'.
(c) '20
H
' (space) and '30
H
' (0) in the character string are counted as one character.
(d) The value to be input to   is string type data within the following range.
ASCII code: '30
H
' to '39
H
', '20
H
', and '00
H
'
(3) Word (unsigned)/16-bit string, double word (unsigned)/32-bit string type can be specified for 
Bit type cannot be specified.
Output from   cannot be used with connecting to input of function and operator 
in double word (unsigned)/32-bit string type. In this case, use the DDABCD 
instruction.
Entered character string
Converted character string
Output (BCD type)
"1"
"1000"
1000
H
(4096)
"12"
"1200"
1200
H
(4608)
"123"
"1230"
1230
H
(4656)
"1234"
"1234"
1230
H
(4656)
"12345"
"1234"
1230
H
(4656)
s
d
String type
"99999999"
Double word (unsigned)/32-bit string type
99999999
H
s
d
s
s
d
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