3. Instructions
520
CS/CJ/NSJ Series Instructions Reference Manual (W474)
Ladder Program for the Double-precision Calculation
Comparison of the Calculation Results
When the real-number results are compared, it is clear that the double-precision calculation yields a
more accurate result.
1. This program section converts the BCD data to dou-
ble-precision floating-point data (64 bits, IEEE754-for-
mat).
• The BIN(023) instructions convert the BCD data to
binary and the DBL(843) instructions convert the
binary data to double-precision floating-point data.
• The floating-point data for the angle θ is output to
D200 and D203.
• RADD(849) converts the angle data in words D200
and D203 to radians.
• The floating-point data for the radius r is output to
words D1200 and D1203.
2. This program section calculates the sin θ and the cos
θ as double-precision floating-point values.
• The value for cos θ is output to words D300 and
D303.
• The value for sin θ is output to words D400 and
D403.
3. This program section calculates x (r × cos θ) and y (r ×
sin θ).
• The value for x (r × cos θ) is output to words
D10000 and D10003.
•The value for y (r × sin θ) is output to D20000 and
D20003.
0.00
BIN
D0
D100
BIN
D1000
D1000
SIND
D200
D400
COSD
D200
D300
END
*D
D1200
D300
D10000
*D
D1200
D400
D20000
DBL
D100
D200
DBL
D1000
D1200
RADD
D200
D200
1.
2.
3.
Coordinate Floating-point number Real number
x 4022 CB39 E973 5C32 3.4202014332567
y 400B 5C92 91AC 8EEB 9.3969262078591
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