CognitiveTPG A798 - Manual (Page 89)

Chapter 4: Programming Commands 89 Revision C 12/09
A798-PG00001C
Sample symbol description:
Each PDF 417 symbol consists of 3 to 90 stacked rows surrounded on all four sides by a quiet zone. Each row contains:
1
Leading quiet zone
2 Start pattern
3 Left row indicator characters (code words)
4 One to thirty data characters (code words)
5 Right row indicator character (code words)
6 Stop pattern
7 Trailing quiet zone
The number of characters in a row and number of rows can be adjusted to vary the symbol’s overall aspect ratio to best fit
an available space.
Each row has a left and right row indicator with a data region between. The left-most character in the top row of the data
region is the total number of characters in the data region, excluding error correction characters. Characters within the data
region are designed to be read from left to right, starting on the top row, immediately after the length-defining character.
The maximum characters in the data region are 928.
Related Information:
The “Set bar code width” command (1D 77 n) affects the x dimension and row height for PDF 417. See chart below.
n value
x dimension row height
2 2 7
3 3 10
4 4 13
5 5 17
6 6 20
Select bar code width
ASCII GS w n
Hexadecimal 1D 77 n
Decimal 29 119 n
Value of n: 2, 3, 4, 5, 6
Default: n=3
Sets the bar code width to n dots.
Formulas
n/8mm (n/203 inch)
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