Delta AH500 - Page 500

AH500 Programming Manual
6-332
API Instruction code Operand
Function
1505 FATAN P
S, D
Arctangent 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
：
Arctangent value Double word
Explanation:
1. Arctangent value=tan
-1
2. The relation between tangent values and arctangent values are shown below.
3. If the conversion result is 0, SM600 is ON.
Example:
When X0.0 is ON, the arctangent of the floating-point number in (D1, D0) is stored in (D11, D10).
The arctangent 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.