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When PDF417 or MicroPDF417 is used, the number of symbol characters called
code words is limited to 928 or less. Moreover, the data compression rate varies
according to the contents of data. Therefore, the maximum number of digits
according to modes is as follows.
When alphabets and numerics are mixed in data in EXC mode, for example,
however, the maximum values become smaller than the following values, since
the internal mode switching code is used.
To correct a reading error by designating the security level, the maximum value
becomes smaller, since the following error correction code words are used.
When the number of digits of the code word exceeds 928, or when the number of
lines exceeds 90 (for PDF417 only), the symbols are not drawn.
For the MicroPDF417, the numbers of lines and digits can be specified.
The maximum number of digits varies according to the setting.
In the case of PDF417
• Extended Alphanumeric Compaction (EXC) mode:
• Binary/ASCII Plus mode:
• Numeric compaction mode:
In the case of MicroPDF417
• Binary mode:
• Upper case letter/space mode:
• Numeric compaction mode:
No. of Error Correction Code Words of PDF417
Security level
Error Correction Ability
Level 0
Level 1
Level 2
Level 3
Level 4
Level 5
Level 6
Level 7
Level 8
No. of error correction
Low
High
- 105 -
1850 digits
1108 digits
2000 digits
150 digits
250 digits
366 digits
For the MicroPDF417, the printer
sets the security level
code words
0
2
6
14
30
62
126
254
510
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