MID

Function - Extract characters of a string at any position.

Inputs

IN : STRING   Character string
NBC : DINT    Number of characters to extract
POS : DINT     Position of the first character to extract (first character of IN is at position 1)

Outputs

Q : STRING    String containing the first NBC characters of IN.

Remarks

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

ST Language

Q := MID (IN, NBC, POS);

FBD Language

LD Language

(* The function is executed only if EN is TRUE *)
(* ENO keeps the same value as EN *)

IL Language:

Op1: LD   IN
     MID  NBC, POS
     ST   Q

See also

+   MLEN   DELETE   INSERT   FIND   REPLACE    LEFT   RIGHT