Printronix LQH-HWTM manual Start code and subset switching is done

UCC/EAN-128

	The start code and subset switching is done
	automatically by IGP based on the data field
	contents so that the bar code length is minimized.
	Subset C encodes each pair of numbers as a single
	bar code character, providing a higher character
	density. If the first four data digits are numbers, the
	bar code starts in subset C; otherwise it starts in
	subset B. The subset will switch from B to C at any
	point in the data field if the next four characters are
	numbers, and will switch from C to B if the next two
	characters are not numbers or only one character
	remains.
	The data field can contain any of the characters
	listed in Table 13 except the system SFCC and the
	character used as a delimiter.
PDF	Optional parameter to enable printing of the human
	readable data field. Enter PDF to print the data
	field. If this parameter is not used, the human
	readable data will not print. This parameter is not
	allowed if a null data field was specified.
LOC	Optional parameter to identify the location of the
	printable data field. The default value is B, locating
	the human readable data below the bar code. A
	locates the printable data field above the bar code.
	The height of the bar code body is reduced to
	compensate for the human readable field and the
	guard bands.
FONT	Optional parameter to identify the font of the
	printable data field. Enter O to select OCR-A font;
	enter X to select OCR-B font; enter N to select 10
	cpi; enter P to select 12 cpi; enter Q to select 13
	cpi; enter R to select 15 cpi; enter T to select 17 cpi;
	enter V to select 20 cpi.
STOP	Ends the bar code command while the IGP
	continues in the Create Form mode. Enter STOP. If
	STOP is not encountered, an error message
	results.

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