Delta Electronics DVP15MC11T Operation Manual page 157

DVP15MC11T Operation Manual

Users can choose different data types for the input parameter in this instruction. But the data type of
the output parameter is restricted to LREAL. An error will occur during the compiling of the software
if the data type of the output parameter is not LREAL.

Precautions for Correct Use

The input variable is not allowed to omit. An error will occur during the compiling of the software if
the input variable is omitted. But the output variable is allowed to omit.
The value of Out varies between -π/2 and π/2 when the value of In changes between -1.0 and 1.0.

The instruction will not go to the error state if the value of In is out of -1.0 ~1.0 and the value of Out is
nonnumeric as shown in the following table and program.
The variable table and program
ASIN_EN
ASIN_In
Out1

Programming Example

The data types of variables ASIN_In and Out1 are REAL and LREAL respectively. The value of
Out1 is 1.5707963267949 if the value of ASIN_In is 1.0 when ASIN_EN changes to TRUE. The
_8 value of Out1 is -1.5707963267949 as ASIN_In is -1.0.

Variable 1
ASIN_EN
ASIN_In
Out1

Variable 2
ASIN_EN
ASIN_In
Out1
8-86
-1, 0
Variable name
Variable name
Variable name
Out
:
In Input data Sine
Out: As ine in r adians
π
2
0
π
-
2
Data type
BOOL
REAL
LREAL
1
ASI N
AS IN_EN EN E NO
A SIN_I n In Out Ou t1
Data type
BOOL
REAL
LREAL
Data type
BOOL
REAL
LREAL
( )
( )
In
1,0
Current value
TRUE
2.0
1.#QNAN
Current value
TRUE
1.0
1.5707963267949
Current value
TRUE
-1.0
-1.5707963267949