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(16) Explanation for the PDF417 and MicroPDF417
c
Security level
The PDF417 contains a function to correct a code reading error using an error
correcting code word and restore normal data. The security level should be
designated according to usage to perform the error correction function.
For the MicroPDF417, the printer sets the security level automatically.
Security level
Error Correction Ability
No. of error correction
code words
Level 0
0
Level 1
2
Level 2
6
Level 3
14
Level 4
30
Level 5
62
Level 6
126
Level 7
254
Level 8
510
d
No. of columns (strings)
The number of rows is variable in the PDF417. The row length (No. of data strings) is
also variable. Therefore, a symbol can be created in a form that can be easily printed,
by changing the proportion of the height and width.
The number of columns (data strings) is variable between 1 and 30.
If the number of columns is small when data amount is large and security level is high,
drawing may not be performed. This is because the number of rows exceeds 90
when the number of columns becomes small. (When the PDF417 is used, the
number of rows of symbols is limited from 3 to 90.)
For the MicroPDF417, not only the number of columns (data strings) but also the
number of rows (data lines) can be designated. When these are to be designated,
see the table on page 72. Note that the max. number of digits for the set parameter
(gg) varies according to the character type. If data over the max. number of digits for
the set parameter (gg) is set, the bar code is not printed. The number of columns
(data strings) is variable from 1 to 4.
However, the max. number of lines, which is 44, depends on the number of columns.
(17) Explanation for QR code
c
Error correction level
The QR code contains functions to detect and correct an error. If one of the data
characters is damaged, the information can be restored when this code is read.
There are 4 levels that can be designated. The level should be specified according to
usage. The general correction ability is as follows.
Level
Error correction ability
Overhead by correcting
an error
High density level
Low
7%
Standard level
15%
Reliability level
25%
High reliability level
High
30%
Low
High
Summary of Contents for B-EV4 Series
Page 232: ... 228 3 JIS Hexadecimal ...
Page 233: ... 229 ...
Page 234: ... 230 ...
Page 235: ... 231 ...
Page 236: ... 232 ...
Page 237: ... 233 ...
Page 238: ... 234 11 7 TrueType FONT 1 PC 850 2 PC 8 ...
Page 239: ... 235 3 PC 852 4 PC 857 ...
Page 240: ... 236 5 PC 851 6 PC 855 ...
Page 241: ... 237 7 PC 1250 8 PC 1251 ...
Page 242: ... 238 9 PC 1252 10 PC 1253 ...
Page 243: ... 239 11 PC 1254 12 PC 1257 ...