Chapter 5
Programming Via Escape Sequences
5–16
The UPC and EAN codes have several options that may be enabled or
disabled.
• All versions (UPC A, UPC E, EAN 8, or EAN 13) may be automatically
recognized and decoded.
• You may restrict the code to only UPC–A and UPC–E. EAN–13 and
EAN–8 symbols will not be decoded.
• UPC–E symbols may be expanded into the UPC–A format.
• Supplemental characters may be enabled. If they are enabled, the symbol
must be scanned in the forward direction, supplemental characters last.
If the symbol is scanned backwards, for instance with the reverse sweep of a
laser scanner, or the symbol does not have supplemental characters, the
symbol will not be decoded.
By specifying the length of the supplement (for example 2 or 5), you will not
miss the supplemental characters if scanned incorrectly (unless they are not
present). There are three configurable options:
" Symbols with two digit supplemental characters may be read.
" Symbols with five digit supplemental characters may be read.
" Symbols with two or five digit supplemental characters may be read.
• Automatic recognition of supplemental characters may be enabled. This
allows you to decode a symbol with or without supplemental characters.
Note: If supplemental characters are present in the symbol, the symbol must
be scanned in the forward direction, supplements last.
If the symbol is scanned in the opposite directions, with the supplements
first, or the scan misses the supplemental characters, the supplements will not
be decoded.
Note: This function should not be used with bidirectional scanning devices,
or in applications where the symbol may be inverted.
UPC/EAN Options Syntax
Esc – y <n> H
Binary Value
Function
0*
1
2
4
8
16
32
64
Disabled
Code 39 Full ASCII Conversion①
Codabar Start/Stop Character Suppression②
UPC/EAN UPC Decode Only
UPC/EAN 2 Digit Supplements
UPC/EAN 5 Digit Supplements
UPC/EAN Expand UPC E to UPC A
UPC/EAN Autodiscriminate Supplements
Values of n: 0 . . . 127
*Default
① Page 5-23
② Page 5-22
UPC/EAN Options
Esc – y <n> H
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