Brother QL-720NW - Manual (Page 76)

P-touch Template Command Reference
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7. Control Command Details
ESC iXa1 Retrieve non-printed text strings
ASCII: ESC i X a 1 n1 n2 n3
Decimal: 27 105 88 97 49 n1 n2 n3
Hexadecimal: 1B 69 58 61 31 n1 n2 n3
Parameters
n1: 01h (Fixed)
n2: 00h (Fixed)
n3: 01h (Fixed)
Description
 Retrieves the specified non-printed text string.
 2- to 22-byte data is returned from the printer. (Varies depending on the length of the text string)
[1,2]: n1 n2 (number of characters) n1+(n2*256)
[3 and later]: Text string
 The retrieved value is a value specified by a static command.
Example
 When “ABCD” is specified as the non-printed text string:
The following command is sent to the printer.
Code: ESC i X a 1 01h 00h 01h
(1Bh 69h 58h 61h 31h 01h 00h 01h)
Returned value: 04h 00h A B C D
(04h 00h 41h 42h 43h 44h)