Specifications

Confidential
EPSON
TITLE
SHEET
REVISION
NO.
SHEET NEXT
D
TM-U230
Specification
(STANDARD)
107 106
GS ( A p
L
p
H
n m
[Name] Execute test print
[Format] ASCII GS ( A p
L
p
H
n m
Hex 1D 28 41 p
L
p
H
n m
Decimal 29 40 65 p
L
p
H
n m
[Range] (p
L
+(p
H
×256))=2 (p
L
=2, p
H
=0)
0 ≤ n ≤ 2, 48 ≤ n ≤ 50
1 ≤ m ≤ 3, 49 ≤ m ≤ 51
[Description] • Executes a test print with a specified test pattern on the specified paper.
• p
L and pH specifies the number of the parameter such as n, m as (pL + (pH × 256)) bytes.
n specifies the paper to be tested.
n Paper
0, 48 Basic (paper roll)
1, 49
2, 50
Paper roll
m specifies a test pattern.
m Test pattern
1, 49 Hexadecimal dump
2, 50 Printer status print
3, 51 Rolling pattern print
[Details] • This command is enabled only when processed at the beginning of a line in standard mode.
• After the test print is finished, the printer resets itself automatically. Therefore, the
already-defined data before this command is executed, such as user-defined characters,
downloaded bit image, and macro, becomes undefined, and the receive buffer and print
buffer are cleared, and each setting returns to the default value. The printer also re-reads
the DIP switch settings.
• At the end of the test print, the printer cuts the paper.
• The printer goes BUSY while this command is executed.
[Notes] • When a hexadecimal dump is printed by this command, the data transmitted after the
command may not be printed, because the printer clears the receive buffer. To avoid this,
transmit data from the host after the printer prints the starting message of the hexadecimal
dump.