Specifications

The format for the ^BY instruction is:

^BYw,r,h

where

^BY = Change Bar Code Default Parameters

w = Module (Narrow Bar) Width

Initial power -up value: 2 dots

Acceptable values: 1-10 dots

r = Wide Bar to Narrow Bar Width Ratio

Initial power-up ratio: 3.0

Acceptable ratios: From 2.0 to 3.0 in .1 increments.

(No affect on Fixed Ratio bar codes.)

h = Height of Bars

Initial Power-up value: 10 dots,

Acceptable values: 1 dot to height of label

For parameter r, the actual ratio generated is a function of the number

of dots in parameter w, narrow bar (module). See Table - Bar Code

Print Ratios on previous page.

For example, select module width w at 9 and the ratio r at 2.4. The

width of the narrow bar is 9 dots wide and the wide bar is 9 x 2.4 or

21.6 dots. However, since the printer rounds out to the nearest dot, the

wide bar is actually printed at 22 dots.

This produces a bar code with a ratio of 2.44 (22 divided by 9). This

ratio is as close to 2.4 as possible since only full dots are printed.

Module width and height (parameters w and h) may be changed at

anytime with the ^BY instruction regardless of the symbology

selected.

NOTE 1: Once a ^BY instruction is entered into a label format, it

stays in effect until the another ^BY instruction is encountered.

NOTE 2: Parameter b in the ^BY instruction is overridden by the

“h” parameter in any bar cod

e that comes after the ^BY instruction.

ZPL II COMMAND REFERENCE 175