Copyright 2008 Unitech Electronics Co., Ltd. All rights reserved. Unitech is a registered trademark of Unitech Electronics Co., Ltd.
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Copyright 2008 Unitech Electronics Co., Ltd. All rights reserved. Unitech is a registered trademark of Unitech Electronics Co., Ltd.
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Programming Information
This section lists the printer control command strings.

ASCII Control Characters

Character Hex / Dec Control Action
EOT 04/04 End of text
BS 08/08 Back space
HT 09/09 Horizontal tab
LF 0A/10 Line feed
VT 0B/11 Vertical tab
FF 0C/12 Form feed
CR 0D/13 Carriage return
SO 0E/14 Shift out
SI 0F/15 Shift in
XON 11/17 Transmitter on
AUXON 12/18 Printer on
XOFF 13/19 Printer receiver is off
NORM 14/20 Return to default 42 column mode
AUXOFF 15/21 Printer to host: Printer is off
CANCEL 18/24 Cancel and reset printer buffer
ESC 1B/27 Escape
EXTEND 1C/28 Extended print
EXTEND OFF 1D/29 Extended print off / Normal print

Printer Font Commands - Courier Character Set

Font Name Character Size ( W x H) Command String
24 CPI Normal 8 x 23 ESC+’k’+’5’
21 CPI Normal 9 x 23 ESC+’k’+’4’
19 CPI Normal 10 x 23 ESC+’k’+’3’
16 CPI Normal 12 x 23 ESC+’k’+’2’
12 CPI Normal 16 x 23 ESC+’k’+’1’
13 CPI Rotated 14 x 16 ESC+’k’+’0’

Printer Font Commands

Command String Printer Action
ESC - ‘F’ - 1 Selects International character set
ESC - ‘F’ - 2 Selects PC Line Draw character set
ESC - ‘U’ - ‘1’ Enable emphasized print
ESC - ‘U’ - ‘0’ Disable emphasized print
Below are the International and PC Line Character sets from 32 through 255:

International Character Set

PC Line Draw Character Set

Printer Graphic Commands

Command String Printer Action
ESC - ‘A’ – n Select dot line spacing between printed lines
ESC - ‘J’ – n Graphic line feed command
ESC - ‘P’ - ‘#’ Select online mode, characters printed as received
ESC - ‘P’ - ‘$’ Select buffer mode, characters are printed on (^ D)
ESC - ‘V’ - n1 – n2 8-bit graphic command
ESC - ‘v’ - n1 – n2 RLE compressed graphic command