MID

MID 1:

Mid returns a partial string from within a string. MID (STR, LEN, POS) means: Retrieve LEN characters from the STR string beginning with the character at position POS.

FUNCTION MID :STRING(255)

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

Example in IL:

LD 'SUSI'

MID 2,2

ST Var1 (* Result is 'US' *)

Example in ST:

Var1 := MID ('SUSI',2,2);

Requirements

Development environment

Target system type

PLC libraries to include

TwinCAT Version >= 2.6.0

PC or CX (x86)

Standard.Lib

TwinCAT Version >= 2.6.0

BC (165)

Standard.Lb6

TwinCAT Version >= 2.9.0

BCxx50 or BX

Standard.lbx

TwinCAT Version >= 2.10.0 Build >= 1301

CX (ARM)

Standard.lib