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, L20E, L50E, and L70E controllers.
ATAN

Parameter | Parameter Type | Data Type | Description |
---|---|---|---|
EN | Input | BOOL | When set to true, the instruction is enabled.
|
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 ladder diagram example

ATAN structured text example

(* ST Equivalence: *) tangent := TAN (angle); result := ATAN (tangent); (* result is equal to angle*)
Results

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