Datamax-ONeil A-Class Programmer's Manual page 84

Extended System-Level Command Functions
(HB) Head Bias – This command instructs the printer to switch the dot zero
position, as viewed from the label exit. When dot zero occupies the left-most location
on the print head then printing is left justified; and, when dot zero occupies the
right-most location, printing is right justified.
(HC) Head Cleaning – This command controls the print head cleaning routine. The
entered value specifies the inch (or centimeter) count to reach before prompting a
print head cleaning. If the number specified is exceeded three times, the printer will
fault until cleaning is initiated.

The number specified is multiplied by one thousand, and zero disables this function.
(HE) Heat – See Hnn for command details.
(HT) Host Timeout – This command controls the number of seconds a
communications port must be idle before the printer will process data from a
different port or use a different parsing method. The value is also used to "timeout"
an image / label format download (i.e., if, at any time, data flow stops before a
complete label format is received, the data will be ignored).
(IC) Ignore Control Codes – This command allows the user to remove control
codes (< 20 Hex) in the data field. The selected line terminator is processed. When
enabled, DPL Control Code (SOH, STX, CR, ESC, and ^) characters are removed
from the data string. (Note that some fonts do have printable characters in this
range and they will not be printed when enabled.)
(IE) Ignore Distances – This command, when enabled, prevents <STX>O
processing that will change the start of print position.
70 Class Series 2 Programmer's Manual