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FINDPLCopen motion icon

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. - Find position of characters in a string.

Inputs

IN STRING Character string
STR STRING Specific characters to search for within the STRING

Outputs

POS DINT Position of the first character of STR in IN, or 0 if not found.

Remarks

The first valid character position is 1. A return value of 0 means that the STR string has not been found. Search is case sensitive. 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. The second argument is the operand of the function.

ST Language

POS := FIND (IN, STR);

FBD Language

FindFbd.gif (1296 octets)

FFLD Language

(* The function is executed only if EN is TRUE *)
(* ENO keeps the same value as EN *)
FindLd.gif (1540 octets)

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
     FIND   STR
     ST     POS

See also

+   MLEN   DELETE   INSERT   REPLACE    LEFT   RIGHT   MID

 

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