Unisys E-@CTION EFP9800 - Manual (Page 155)

EFP9800 ESC/POS Commands
3255 4073– 002 6– 65
Print Bar Code (Receipt Station)
Selects the bar code type and prints a bar code for the ASCII characters
entered. The command is only valid at the beginning of a line. If the width of the
bar code exceeds one line, the excess data is not printed. Illegal data cancels
the command.
There are two variations to this command: the first uses a NULL character to
terminate the string; the second uses a length byte at the beginning of the string
to compensate for the Code 128 bar code which can accept a NULL character as
part of the data.
Note: Fixed-length codes can be aligned left, center, or right using the Align
Positions command (1B 61). Variable-length codes are always center
aligned.
The check digit is calculated for UPC and JAN (EAN) codes if it is not sent from
the host computer. Six-character zero-suppressed UPC-E tags are generated
from full 11 or 12 characters sent from the host computer according to standard
UPC-E rules. Start/Stop characters are added for Code 39 if they are not
included.