Function - Calculate an arc-tangent.
IN : REAL/LREAL Real value
Q : REAL/LREAL Result: arc-tangent of IN
In LD 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. In IL, the input must be loaded in the current result before calling the function.
Q := ATAN (IN);
(* The function is executed only if EN is
(* ENO keeps the same value as EN *)
Op1: LD IN
ST Q (* Q is: ATAN (IN) *)
SIN COS TAN ASIN ACOS ATAN2