Specify the FNC1 code of EAN-128 barcode.
Specify FNC1 code in hexadecimal. (2digits.)
BARFNC1 FB
FB
If FNC codes (FNC1, FNC2, FNC3 and FNC4) are duplicated, FNC1 has highest priority. Then FNC2, FNC3 follows. And FNC4 has lowest priority.