Specifications

31
ZPL Commands
^B7
9/15/06 ZPL II Programming Guide 45541L-004 Rev. A
^B7
PDF417 Bar Code
Description The ^B7 command produces the PDF417 bar code, a two-dimensional,
multirow, continuous, stacked symbology. PDF417 is capable of encoding over
1,000 characters per bar code. It is ideally suited for applications requiring large amounts of
information at the time the bar code is read.
The bar code consists of three to 90 stacked rows. Each row consists of start and stop patterns
and symbol characters called code-words. A code-word consists of four bars and four spaces.
A three code-word minimum is required per row.
The PDF417 bar code is also capable of using the structured append option (
^FM), which
allows you to extend the field data limitations by printing multiple bar codes. For more
information on using structured append, see ^FM on page 142.
• PDF417 has a fixed print ratio.
• Field data (
^FD) is limited to 3K of character data.
Format ^B7o,h,s,c,r,t
This table identifies the parameters for this format:
Parameters Details
o = orientation Accepted Values:
N = normal
R = rotated 90 degrees (clockwise)
I = inverted 180 degrees
B = read from bottom up, 270 degrees
Default Value: current
^FW value
h = bar code height
for individual
rows (in dots)
Accepted Values: 1 to height of label
Default Value: value set by
^BY
This number multiplied by the module equals the height of the
individual rows in dots. If this number is not specified, the
overall bar code height, divided by the number of rows,
equals the height of the individual rows in dots, where the
overall bar code height is defined by the ^BY command. 1 is
not a recommended value.
s = security level Accepted Values: 1 to 8 (error detection and correction)
Default Value:
0 (error detection only)
This determines the number of error detection and correction
code-words to be generated for the symbol. The default level
provides only error detection without correction. Increasing
the security level adds increasing levels of error correction
and increases the symbol size.