Delta DVP-15MC Series, Operation Manual

Page: 184 / 972

Chapter 8 Logic Instructions
8-97
8_
FB/FC Explanation Applicable model
FC
ATAN is used to find the arc tangent of a number and the result is output to
Out . The unit of Out is radian.
DVP15MC11T
DVP15MC11T-06

Parameters
Parameter
name
Meaning
Input/
Output
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
Operation
result
Output Operation result -
π/2 ~ π/2
B
oo
le
an
Bit string Integer
Real
number
Time, date
S
tr
in
g
B
OOL
BYT
E
WO
R
D
DW
O
RD
LW
O
R
D
US
INT
UI
NT
UDI
NT
UL
INT
SI
N
T
IN
T
DI
NT
LI
N
T
R
EA
L
L
R
E
AL
T
IME
D
AT
E
T
O
D
DT
S
T
RI
NG
In
● ● ● ● ● ● ● ● ● ● ● ● ● ●
Out
●
Note:
The symbol
●
indicates that the parameter is allowed to connect to the variable or constant of the data
type.

Function Explanation

ATAN is used to calculate the arc tangent of the input parameter In and the result is output to Out .

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.
ATA N
EN ENO
In Ou t
O ut
I n
2
2
-
0
I n Inp ut dat a Tangent
:
( )
O ut Arc t an gent ( in radi ans )
：
π
π