Chapter 4: Programming Commands98
Revision D 12/09
A799-PG00001D
Recognizing data from the printer
An application sending various real time and non-real time commands to which the printer responds can determine which
command a response belongs to by the table below.
Responses to transmit peripheral device status (1B 75) and transmit paper sensor status (1B 76) are non-real time
responses and will arrive in the order in which they were solicited.
Batch mode response Response recognized by:
ASCII HEX
ECS u 0 1B 75 0 0 0 0 0 0 0 x x Binary
ESC v 1B 76 0 x x 0 0 x x x Binary
GS I n 1D 49 n 0 x x 0 x x x x Binary
GS r n 1D 72 n 0 x x 0 x x x x Binary
Real time response Response recognized by:
ASCII HEX
GS EOT n 1D 04 n 0 x x 1 x x 1 0 Binary
DLE EOT n 10 04 n 0 x x 1 x x 1 0 Binary
GS ENQ 1D 05 1 x x x x x x x Binary
XON 0 0 0 1 0 0 0 1 Binary
XOFF 0 0 0 1 0 0 1 1 Binary
Unsolicited status mode (USM) Response recognized by:
USM Byte 1 0 x x 1 x x 0 0 Binary
USM Byte 2-4 0 x x 0 x x x x Binary
Bar codes
These commands format and print bar codes and are described in order of their hexadecimal codes.
These commands describe operation for 80mm paper. If the printer supports 82.5mm paper, the dot spacing is the same but
there are 640 printable dots rather than the 576 printable dots on 80mm paper.
Select printing position of HRI characters
ASCII GS H n
Hexadecimal 1D 48 n
Decimal 29 72 n
Value of n: Printing position
0 = Not printed
1 = Above the bar code
2 = Below the bar code
3 = Both above and below the bar code
Default: 0 (Not printed)
Prints HRI (human readable interface) characters above or below the bar code.
