Omron CJ - REFERENCE MANUAL 02-2010 Reference Manual page 541

Storage of ASCII Text
After the floating-point number is converted to ASCII text, the ASCII characters are stored in the
destination words beginning with D, as shown in the following diagrams. Different storage methods are
used for decimal notation and scientific notation.
Decimal notation (C=0 hex)
Total number of characters
Integer part Fractional part
Sign
Decimal point
.
A decimal point (ASCII: 2E hex) is added if the number fractional digits is greater than 0.
Spaces (ASCII: 20 hex) are added if the integer part of the floating-point data is shorter than the integer part of the result
(total number of characters - sign digit - decimal point - fractional digits).
Positive number: Space (20 hex)
Negative number: Minus sign (2D hex)
Scientific notation (C=1 hex)
Total number of characters
Exponential part
Integer part
Fractional part
Sign Sign
Decimal point
. E
Letter E (ASCII: 45 hex) is written here.
If there are more fractional digits in the source data than specified in C+1, the extra digits will be rounded off.
If there are fewer fractional digits, zeroes (ASCII: 30 hex) will added to the end of the source data.
A decimal point (ASCII: 2E hex) is added if the number fractional digits is greater than 0.
Spaces (ASCII: 20 hex) are added if the integer part of the floating-point data is shorter than the integer part of the result (total
number of characters - sign digit - decimal point - fractional digits - E digit).
Positive number: Space (20 hex)
Negative number: Minus sign (2D hex)
Note Either one or two bytes of zeroes are added to the end of ASCII text as an end code.
• Total number of characters odd: 00 hex is stored after the ASCII text.
• Total number of characters even: 0000 hex is stored after the ASCII text.
Limits on the Number of ASCII Characters
There are limits on the number of ASCII characters in the converted number. The Error Flag will be
turned ON if the number of characters exceeds the maximum allowed.
• Limits on the Total Number of ASCII Characters
1) Decimal Notation (C = 0 hex)
• When there is no fractional part (C+2 = 0 hex):
2 Total Characters
• When there is a fractional part (C+2 = 1 to 7 hex):
(Fractional digits + 3)
2) Scientific Notation (C = 1 hex)
• When there is no fractional part (C+2 = 0 hex):
6 Total Characters
• When there is a fractional part (C+2 = 1 to 7 hex):
(Fractional digits + 7)
CS/CJ/NSJ Series Instructions Reference Manual (W474)
If there are more fractional digits in the source data than specified in C+1, the extra digits will be rounded
off. If there are fewer fractional digits, zeroes (ASCII: 30 hex) will added to the end of the source data.
0 to 9 are written as 00 to 09.
Positive: Plus sign (2B hex)
Negative: Minus sign (2D hex)
24
Total Characters
24
Total Characters
24
24
3. Instructions
3
505