Mitsubishi Electric MELSEC iQ-R Series - Page 460

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6 BASIC INSTRUCTIONS
6.6 Data Conversion Instructions
Processing details
• These instructions convert the character strings stored in the device numbers specified by (s) and later to 16-bit binary
data, and store the number of digits in (d1) and converted binary data in the device specified by (d2). For conversion of
character strings to binary data, the data from the device number specified by (s) to the device number containing "00H" is
processed as character strings.
Ex.
When a string "-123.45" (signed) is stored in the device specified by (s) or later
• The total number of characters of the character string stored in the device specified by (s) is 2 to 8.
• Of the character string stored in the device specified by (s), the number of characters in the decimal part is 0 to 5. Note,
however, that the number must not exceed the total number of digits minus 3.
• A numerical character string that can be converted to binary data ranges from -32768 to 32767 when a signed value is
specified ignoring the decimal point or from 0 to 65535 when an unsigned value is specified. Numerical character strings
excluding signs and decimal points can be specified only within the range from 30H to 39H. (A value ignoring the decimal
point"-12345.6" for example becomes "-123456".)
• For the sign, "20H" can be set to indicate a positive numerical value, or "2DH" can be set to indicate a negative numerical
value.
• "2EH" is set for the decimal point.
• The total number of digits stored in the device specified by (d1) includes all characters (including signs and decimal points)
that represent a numerical value. The number of digits in the decimal part to be stored in the device specified by (d1)+1
represents the decimal part after 2EH(.) For the 16-bit binary data to be stored in the device specified by (d2), the character
string is converted to binary data by ignoring the decimal point and stored.
• If "20H" (space) or "30H" (0) exists between the sign and the first numerical value other than 0 in the character string in the
device specified by (s), the instruction performs conversion to binary data by ignoring "20H" and "30H".
Ex.
When "20H" exists between the sign and the first numerical value other than 0 (when a signed value is specified)
ASCII S: ASCII code (sign data)
ASCII : ASCII code (th character)
(s)
(s)+1
(s)+2
(s)+3
(s)+4
b15 b0 b7b8
(d1)
(d1)+1
.
00H
(d2)
-
ASCII 1
ASCII 3
ASCII 5
ASCII S
ASCII 2
ASCII 4
ASCII 7
ASCII 6
BIN16

Total number of digits
Number of digits in
the decimal part
Integer value ignoring
the decimal point
Sign
1st character
7th character
Null character (end of string)
(s)
(s)+1
(s)+2
(s)+3
b15 b0 b7b8
(d1)
(d1)+1
.
(d2)
7
2
- 1 2 3 4 5
-123 45
31H (1)
33H (3)
34H (4)
2DH (-)
32H (2)
2EH (.)
00H 35H (5)
12
3
.4
5
-
123
8
2
45-
BIN16
Total number of digits
Number of digits in
the decimal part
Ignored.