Delta AH500 - Page 496

AH500 Programming Manual
6-328
API Instruction code Operand
Function
1503 FASIN P
S, D
Arcsine of the floating-point
number
Device
X Y M S T C HC D L SM SR E PR K 16# “$” DF
S
         
D
        
Pulse instruction
16-bit instruction (5-6 steps)
32-bit instruction
AH500 AH500 -
Symbol:
S
：
Source value Double word
D
：
Arcsine value Double word
Explanation:
1. Arcsine value=sin
-1
The relation between sine values and arcsine values are shown below.
2. If the conversion result is 0, SM600 is ON.
Example:
When X0.0 is ON, the arcsine of the floating-point number in (D1, D0) is stored in (D11, D10). The
arcsine value in (D11, D10) is converted into the degree, and the conversion result is stored in (D21,
D20). The degree in (D21, D20) is converted into the integer, and the conversion result is stored in
(D31, D30). The integer in (D31, D30) is converted into the binary-coded decimal value, and the
conversion result is stored in Y0.15~Y0.0.