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. - Calculates a power.
Inputs
IN : REAL Real value
EXP : DINT Exponent
Outputs
Q : REAL Result: IN at the 'EXP' power
Remarks
In 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.
In IL"Instruction list"
This is a low-level language and resembles assembly, the input must be loaded in
the current result before calling the function. The exponent (second input of the
function) must be the operand of the function.
ST Language
Q := EXPT (IN, EXP);
FBD Language
FFLD Language
(* The function is executed only if EN is TRUE *)
(* ENO keeps the same value as EN *)
IL Language:
Op1: LD"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 IN
EXPT EXP
ST Q (* Q is: (IN ** EXP) *)
See also
