REPLACE

FunctionA 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. - Replace characters in a string.

Inputs

IN : STRING   Character string
STR : STRING  String containing the characters to be inserted
              in place of NDEL removed characters
NDEL : DINT   Number of characters to be deleted before insertion of STR
POS : DINT    Position where characters are replaced (first character position is 1)

Outputs

Q : STRING   Modified string.

Remarks

The first valid character position is 1. 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 first input (the string) must be loaded in the current result before calling the function. Other arguments are operands of the function, separated by comas.

ST Language

Q := REPLACE (IN, STR, NDEL, POS);

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
     REPLACE STR, NDEL, POS
     ST      Q

See also

+   MLEN   DELETE   INSERT   FIND   LEFT   RIGHT   MID