CHAPTER 5 TPCL-LE MODE (INTERFACE COMMANDS)
B-EP
Series
5-154
(5)
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 data. Therefore, the maximum number of digits according to the mode is as follows.
When letters and numerics are mixed in data in EXC mode, for example, the maximum
values become smaller than the values below, since the internal mode selection code is
used.
To correct a reading error by designating the security level, the maximum value becomes
further smaller, since the error correction code words below are used.
When the number of the code words exceeds 928, or when the number of rows exceeds
90, a symbol is not drawn.
For the MicroPDF417, the numbers of rows and columns can be specified. The
maximum number of digits varies according to the setting.
PDF417
• Extended Alphanumeric Compaction (EXC) mode:
1850 digits
• Binary/ASCII Plus mode:
1108 digits
• Numeric compaction mode:
2000 digits
MicroPDF417
• Binary mode:
150 digits
• Upper case letter/space mode:
250 digits
• Numeric compaction mode:
366 digits
No. of Error Correction Code Words of PDF417
(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
Low
High
