1878
25 TYPE CONVERSION FUNCTIONS
25.59 Converting STRING to REAL
• The ASCII code 20H (space) or 30H (0) that exists before the first numerical value 0 in the STRING data type value is
ignored.
• The ASCII code 30H (0) that exists between E and a numerical value in the STRING data type value is ignored (in
exponential form only).
• The ASCII code 20H (space) that exists in the the string is ignored.
• Up to 24 characters can be input. The ASCII codes 20H (space) and 30H (0) that exist in the string are counted as one
character as well.
• Input a STRING data type value to (s) within the following range.
■
Operation result
1.
Function without EN/ENO
The operation processing is performed. The operation result is output from (d).
2.
Function with EN/ENO
The execution conditions and operation results will be as follows.
*1 If the value FALSE is output from ENO, the output data from (d) will be undefined. Create a program so that the undefined value will not
be used in operations.
Operation error
• When (s) is in decimal form
• When (s) is in exponential form
• ASCII code: 30H to 39H, 45H, 2BH, 2DH, 2EH, 20H, and 00H
Execution condition
Operation result
EN
ENO
(d)
TRUE (executed)
TRUE
Operation result output value
FALSE (not executed)
FALSE
Undefined value
Error code
(SD0)
Description
2820H
There is no NULL code (00H) in the device area (between the specified device number and the last device number) specified by (s).
3401H
An out-of-range value is input to (s).
• The integral part or decimal part contains a character other than 30H(0) to 39H(9).
• More than one 2EH (.) exists in the specified string.
• The exponent of the specified character string contains a character other than 45H(E), 65H(e), 2BH(+), and 2DH(-).
• The specified character string contains more than one exponent 45H(E) or 65H(e).
• The exponent in the specified string contains a numerical value consisting of three digits or more.
• The exponent of the specified character string contains more than one sign 2BH(+) or 2DH(-).
• The specified string (in the integral part if the decimal format is used or in the mantissa if the exponent format is used) contains more
than one sign data of 2BH(+) or 2DH(-).
• The number of characters in the device specified by (s) and later is 0 or exceeds 24.
3403H
The data output from (d) exceeds the following range. (An overflow has occurred.)
|(d)|<2
128
4
3
0
-
0 1 . 3 5
-1.35034
REAL
0
1
-
E
4
3
0
-
0 1 . 3 5
-1.35034E-10
REAL
2
0
-
E
4
3
0
- 1 . 3 5
-1.35034E-2
REAL
Содержание MELSEC iQ-R Series
Страница 1: ...MELSEC iQ R Programming Manual Instructions Standard Functions Function Blocks ...
Страница 2: ......
Страница 24: ...22 INDEX 2092 INSTRUCTION INDEX 2093 REVISIONS 2104 WARRANTY 2105 TRADEMARKS 2106 ...
Страница 34: ...32 MEMO ...
Страница 35: ...33 PART 1 PART 1 OVERVIEW This part consists of the following chapter 1 OVERVIEW ...
Страница 68: ...66 1 OVERVIEW 1 5 Precautions on Programming MEMO ...
Страница 204: ...202 5 SEQUENCE INSTRUCTIONS 5 3 Output Instructions Operation error There is no operation error ...
Страница 470: ...468 6 BASIC INSTRUCTIONS 6 6 Data Conversion Instructions Operation error There is no operation error ...
Страница 472: ...470 6 BASIC INSTRUCTIONS 6 6 Data Conversion Instructions Operation error There is no operation error ...
Страница 479: ...6 BASIC INSTRUCTIONS 6 6 Data Conversion Instructions 477 6 Operation error There is no operation error ...
Страница 504: ...502 6 BASIC INSTRUCTIONS 6 7 Data Transfer Instructions Operation error There is no operation error ...
Страница 518: ...516 6 BASIC INSTRUCTIONS 6 7 Data Transfer Instructions Operation error There is no operation error ...
Страница 520: ...518 6 BASIC INSTRUCTIONS 6 7 Data Transfer Instructions Operation error There is no operation error ...
Страница 754: ...752 7 APPLICATION INSTRUCTIONS 7 9 Real Number Instructions Operation error There is no operation error ...
Страница 756: ...754 7 APPLICATION INSTRUCTIONS 7 9 Real Number Instructions Operation error There is no operation error ...
Страница 758: ...756 7 APPLICATION INSTRUCTIONS 7 9 Real Number Instructions Operation error There is no operation error ...
Страница 760: ...758 7 APPLICATION INSTRUCTIONS 7 9 Real Number Instructions Operation error There is no operation error ...
Страница 895: ...7 APPLICATION INSTRUCTIONS 7 16 Ramp Signal Instruction 893 7 Operation error There is no operation error ...
Страница 917: ...7 APPLICATION INSTRUCTIONS 7 20 Data Processing Instructions 915 7 Operation error There is no operation error ...
Страница 919: ...7 APPLICATION INSTRUCTIONS 7 20 Data Processing Instructions 917 7 Operation error There is no operation error ...
Страница 1415: ...13 SFC PROGRAM INSTRUCTIONS 13 1 SFC Control Instructions 1413 13 Operation error There is no operation error ...
Страница 1448: ...1446 14 REDUNDANT SYSTEM INSTRUCTIONS 14 2 Disabling Enabling System Switching MEMO ...
Страница 1795: ...25 TYPE CONVERSION FUNCTIONS 25 1 Converting BOOL to WORD 1793 25 Operation error There is no operation error ...
Страница 1805: ...25 TYPE CONVERSION FUNCTIONS 25 10 Converting WORD to DINT 1803 25 Operation error There is no operation error ...
Страница 1819: ...25 TYPE CONVERSION FUNCTIONS 25 21 Converting INT to DWORD 1817 25 Operation error There is no operation error ...
Страница 1950: ...1948 32 STRING FUNCTIONS 32 2 Extracting String Data From the Left Right Operation error There is no operation error ...
Страница 1972: ...1970 33 TIME DATA TYPE FUNCTIONS 33 4 Division MEMO ...
Страница 2067: ...APPX Appendix 5 PID Control Program Examples 2065 A 252 Set PID control data for loop 2 ...
Страница 2082: ...2080 APPX Appendix 6 Process Control Program Examples 129 Set the default value of the loop tag ...
Страница 2093: ...APPX Appendix 7 List of Loop Tag Memory Areas Used by Process Control Instructions 2091 A MEMO ...
Страница 2109: ......