atan / atanL

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Function A function calculates a result according to the current value of its inputs. A function has no internal data and is not linked to declared instances. - Calculate an arc-tangent.

Inputs

Input	Data Type	Range	Unit	Default	Description
IN	REAL / LREAL				Real value.

Outputs

Output	Data Type	Range	Unit	Description
Q	REAL / LREAL			Result: Arc-tangent of IN.

Remarks

None

FBD Language Example

FFLD Language Example

In the FFLD Language, the operation is executed only if the input rung (EN) is TRUE.
- The output rung (ENO) keeps the same value as the input rung.
- ENO keeps the same value as EN.

IL Language Example

In the IL Instruction list - This is a low-level language and resembles assembly. Language, the first input must be loaded before the function call.

Op1: LD Ladder diagram - This is a method of drawing electrical logic schematics. It is a very popular graphical language for programming Programmable Logic Controllers (PLCs). It was originally invented to describe logic made from relays. The name is based on the observation that programs in this language resemble ladders, with two vertical rails and a series of horizontal rungs between them.  IN
     ATAN
     ST  Q    (* Q is: ATAN (IN) *)

ST Language Example

Q := ATAN (IN);