Brother QL-720NW - Manual (Page 70)

P-touch Template Command Reference
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7. Control Command Details
ESC iXF2 FNC1 replacement setting
ASCII: ESC i X F 2 n1 n2 n3
Decimal: 27 105 88 70 50 n1 n2 n3
Hexadecimal: 1B 69 58 46 32 n1 n2 n3
Parameters
n1: 01h (Fixed)
n2: 00h (Fixed)
n3: 00h 01h
Description
 Selects whether or not GS codes, which are included in barcode protocols such as GS1-128
(UCC/EAN-128), are replaced with FNC1 codes.
n3=00h: FNC1 replacement setting OFF
n3=01h: FNC1 replacement setting ON
 This command is a static command.
Example
 To disable FNC1 replacement:
ESC i X F 2 01h 00h 00h
(1Bh 69h 58h 46h 32h 01h 00h 00h)