Function - Extract characters of a string at any position.
IN : 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)
Q : STRING String containing the first NBC characters of IN.
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.
Q := MID (IN, NBC, POS);
(* The function is executed only if EN is
(* ENO keeps the same value as EN *)
Op1: LD IN
MID NBC, POS
+ MLEN DELETE INSERT FIND REPLACE LEFT RIGHT