Chapter 8 Logic Instructions 
8-93 
 
FC 
ASIN is used to get the arc sine of a number and the result is output to Out. 
The unit of Out is radian.   
DVP15MC11T 
DVP15MC11T-06 
 
 
  Parameters 
Meaning 
Description  Valid range   
In 
Number to 
process 
Input  Number to process 
Depends on the data type of 
the variable that the input 
parameter is connected to. 
Out 
Output  Operation result 
-π/2 ~ π/2 
 
 
Boolean 
Bit string  Integer 
Real 
number 
Time, date 
String 
BOOL 
BYTE 
WORD 
DWORD 
LWORD 
USINT 
UINT 
UDINT 
ULINT 
SINT 
INT 
DINT 
LINT 
REAL 
LREAL 
TIME 
DATE 
TOD 
DT 
STRING 
In     
●  ●  ●  ●  ●  ●  ●  ●  ●  ●  ●  ●  ●  ● 
         
Out                             
● 
Note:   
The symbol  ●  indicates that the parameter is allowed to connect to the variable or constant of the data 
type. 
  Function Explanation 
  ASIN is used to calculate the arc sine of the input parameter In and the result is output to Out. 
 
 
Out
In
2
2
-
0 1,0-1, 0
In Input data Sine:   ( )
Out: Asine in radians ( )
π
π