DELETE

The function DELETE removes a partial string from a larger string at a defined position. The input variable STR is type STRING, LEN and POS are type INT, the return value of the function is type STRING.
DELETE (STR, LEN, POS) means: Delete LEN characters from STR beginning with the character in the POS.

VAR_INPUT
    STR  : STRING(255);
    LEN  : INT;
    POS  : INT;
END_VAR

LD 'SUXYSI'
DELETE 2,3
ST Var1 (* Result is 'SUSI' *)

Var1 := DELETE ('SUXYSI',2,3);