atan2 / atan2L

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 FunctionClosed 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 arc-tangent of Y/X.

Inputs

Input

Data Type

Range

Unit

Default

Description

X

REAL / LREAL

 

 

 

Real value.

Y

REAL / LREAL

 

 

 

Real value.

Outputs

Output

Data Type

Range

Unit

Description

Q

REAL / LREAL

 

 

Result: arc-tangent of X / Y.

Remarks

None

FBD Language

FFLD Language

  • 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.

IL Language

Op1: LDClosed "Ladder diagram"
Ladder logic is a method of drawing electrical logic schematics. It is now 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  Y
     ATAN2 X
     ST  Q    (* Q is: ATAN2 (Y / X) *)

See Also