Specify the FNC4 code of EAN-128 barcode.
Specify FNC4 code in hexadecimal. (2digits.)
BARFNC4 FE
FE
If FNC codes (FNC1, FNC2, FNC3 and FNC4) are duplicated, FNC1 has highest priority. Then FNC2, FNC3 follows. And FNC4 has lowest priority.