TH320/TH420
Programmers Guide
85
There are three mutually exclusive sets of symbol patterns, or clusters, each having 929 distinct
patterns. Because different clusters are used for adjacent rows, it is possible for the decoder to tell if
the scanning path is crossing row boundaries without the use of separator bars.
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 characters (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
3 for receipt; 2 for slip
Set the bar code width to n dots.
Formulas
n/ 8 mm (n/203 inch) for receipt.
n/ 5.7 mm (n/144 inch) for slip.
Summary of Contents for TH320
Page 1: ...TH320 TH420 Two Color Thermal Impact Hybrid Printer Programmers Guide ...
Page 75: ...TH320 TH420 Programmers Guide 67 ...
Page 121: ...TH320 TH420 Programmers Guide 113 Character Sets Character code 437 USA Standard Europe ...
Page 122: ...Programmers Guide TH320 420 114 Codepage 737 Greek ...
Page 123: ...TH320 TH420 Programmers Guide 115 Codepage 850 Multilingual ...
Page 124: ...Programmers Guide TH320 420 116 Codepage 852 Slavic ...
Page 125: ...TH320 TH420 Programmers Guide 117 Codepage 857 Turkish ...
Page 126: ...Programmers Guide TH320 420 118 Codepage 858 with Euro symbol ...
Page 127: ...TH320 TH420 Programmers Guide 119 Codepage 860 Portuguese ...
Page 128: ...Programmers Guide TH320 420 120 Codepage 862 Hebrew ...
Page 129: ...TH320 TH420 Programmers Guide 121 Codepage 863 French Canadian ...
Page 130: ...Programmers Guide TH320 420 122 Codepage 865 Nordic ...
Page 131: ...TH320 TH420 Programmers Guide 123 Codepage 866 Cyrillic ...
Page 132: ...Programmers Guide TH320 420 124 Codepage 1252 Windows Latin 1 ...
Page 134: ...Programmers Guide TH320 420 126 Codepage 1255 Hebrew ...
Page 142: ...Programmers Guide TH320 420 134 TH420 Additional Features ...
Page 156: ......
Page 157: ...TH320 TH420 Programmers Guide Wincor Nixdorf International GmbH D 33094 Paderborn ...