Printronix L7032 Programmer's Reference Manual page 200

Chapter 3
Bar Codes
NOTE: VGL automatically checks ratio data for validity only within the
200
8 module wide bar
8 module wide space
allowable hexadecimal range. VGL does not verify that ratio data
creates acceptable bar/space element relationships for bar code
readability. When designing unique ratio data, carefully plot bar/
space ratios to conform to readable bar codes.
data The bar code data. In the automatic mode,
whenever a string of 4 or more contiguous numeric
digits are detected, VGL inserts a subset C
command at the start of the numeric string. When
the string of numeric digits is broken, VGL inserts a
subset B command. Code 128 encodes from 1
through 40 characters from the character set of the
subset code selected. Use the appropriate subset
code from the Code 128 Character Set in Table 32.
When data is provided in the manual mode, the
readable data field is not printed.
(cc)G Terminates the bar code command. Enter the
SFCC for your VGL configuration immediately
followed by any valid command character or G, the
universal sequence terminator.