Brother RJ-4040 - Manual (Page 104)

ESC/P Command Reference
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5. Control Command Details
ESC iX(2 Specify default page length
ASCII: ESC i X ( 2 n1 n2 n3 n4
Decimal: 27 105 88 40 50 n1 n2 n3 n4
Hexadecimal: 1B 69 58 28 32 n1 n2 n3 n4
Parameters
n1: 02h (Fixed)
n2: 00h (Fixed)
00h≤n3≤FFh, 00h≤n4≤1Fh
Description
 Specifies the default page length.
n3+(n4*256): Default page length (dots) (0, 203 through 7999)
*A default page length of 0 indicates the Auto setting.
*The manufacturer’s default is 0.
 This command is a static command.
Remarks
 Invalid if the setting is a value outside of the allowable range
ESC iX(1 Retrieve default page length
ASCII: ESC i X ( 1 n1 n2
Decimal: 27 105 88 40 49 n1 n2
Hexadecimal: 1B 69 58 28 31 n1 n2
Parameters
n1: 00h (Fixed)
n2: 00h (Fixed)
Description
 The default page length setting is returned as 4-byte data.
[1] 02h (Fixed)
[2] 00h (Fixed)
[3, 4] n3 n4 settings
n3+(n4*256): Default page length (dots)
*A default page length of 0 indicates the Auto setting.
 The retrieved value is a value specified by a static command.