Lexmark FORMS 249X Technical Reference page 151

v1, v2 define the bar height.
Use the following steps to calculate the values of v1 and v2:
1
Determine the approximate desired height (in inches) of the bar.
2
Let V = 2160 x (height in inches). Round V to the nearest whole number.
3
v1 is the lower byte of V (remainder of V divided by 256).
4
v2 is the upper byte of V (quotient of V divided by 256).
Example:
1
Desired height is 0.47 inch.
2
V = round (2160 x 0.47) = round (1015.2) = 1015.
3
v1 = remainder (1015 divided by 256) = 247, xF7
4
v2 = quotient (1015 divided by 256) = 3, x03
v1, v2 are subject to the following limitation:
Minimum
Printer Model value
248x
249x
Notes:
• If you try to use values less than the minimum values, the printer
ignores your values and uses the minimum values.
• The vertical pitch for 248x printers is 1/72 inch.
The vertical pitch for 249x printers is 1/180 inch.
c is the control flag.
c is a multi-purpose parameter. It has three bits that determine check digit,
human readable character, and flag character position.
x x x
b7 b6 b5
b0: check digit
0: If check digit is to be printed, host/software generates it.
1: Printer generates and prints check digit.
V
Minimum v1, v2
values
270 x0E, x01
288 x20, x01
Flag
x x
Char.
b4 b3 b2
Human
Check
Read.
Digit
Char.
b1 b0
Section 8: Barcodes
151