ATAN (arctangent)

The ATAN instruction calculates the arctangent of a Real value.
Languages supported: Function block diagram, ladder diagram, structured text.
This instruction applies to the
Micro810
 LC10,
Micro820
 L20E,
Micro850
 L50E, and
Micro870
 L70E controllers.
ATAN
ATAN
ATAN parameters
Parameter
Parameter Type
Data Type
Description
EN
Input
BOOL
When set to true, the instruction is enabled.
  • TRUE: Execute the current computation.
  • FALSE: There is no computation.
Applies to ladder diagram programs.
IN
Input
REAL
Any Real value.
ATAN
Output
REAL
Arctangent of the input value (in set [-PI/2 .. +PI/2]) = 0.0 for invalid input.
ENO
Output
BOOL
Enables output. Applies to ladder diagram programs.

ATAN examples

ATAN function block diagram example
ATAN function block diagram example
ATAN ladder diagram example
ATAN ladder diagram example
ATAN structured text example
ATAN structured text example
(* ST Equivalence: *)
tangent := TAN (angle);
result := ATAN (tangent); (* result is equal to angle*)
Results
Results
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