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3. Instructions
CS/CJ/NSJ Series Instructions Reference Manual (W474)
Floating-point Math Instructions
3
FSTR
z 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.
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.
z 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 ≤ 24
• When there is a fractional part (C+2 = 1 to 7 hex):
(Fractional digits + 3) ≤ Total Characters ≤ 24
2) Scientific Notation (C = 1 hex)
• When there is no fractional part (C+2 = 0 hex):
6 ≤ Total Characters ≤ 24
• When there is a fractional part (C+2 = 1 to 7 hex):
(Fractional digits + 7) ≤ Total Characters ≤ 24
.
Decimal notation (C=0 hex)
Integer part
Positive number: Space (20 hex)
Negative number: Minus sign (2D hex)
Sign
Total number of characters
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).
Fractional part
Decimal point
.
E
Scientific notation (C=1 hex)
Integer part
Positive: Plus sign (2B hex)
Negative: Minus sign (2D hex)
Sign
Total number of characters
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).
Fractional part
Decimal point
Exponential part
0 to 9 are written as 00 to 09.
Letter E (ASCII: 45 hex) is written here.
Positive number: Space (20 hex)
Negative number: Minus sign (2D hex)
Sign