Brother QL-720NW - Manual (Page 74)

P-touch Template Command Reference
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7. Control Command Details
ESC iXr1 Retrieve print start received character count
ASCII: ESC i X r 1 n1 n2
Decimal: 27 105 88 114 49 n1 n2
Hexadecimal: 1B 69 58 72 31 n1 n2
Parameters
n1: 00h (Fixed)
n2: 00h (Fixed)
Description
 Retrieves the number of characters specified to be received in order to start printing.
 4-byte data is returned from the printer.
[1]: 02h (Fixed)
[2]: 00h (Fixed)
[3,4]: n3 n4 settings
n3+(n4*256): Print start received character count
 The retrieved value is a value specified by a static command.
Example
 For a print start received character count of 500 characters:
Code: ESC i X r 1 00h 00h
(1Bh 69h 58h 72h 31h 00h 00h)
Returned value: 02h 00h F4h 01h (244+1*256=F4h+01h*256=500 characters)