User's Manual

KDC350 User Manual
97
Add-on Symbologies
By default, the 2 or 5 digit add-on symbols with a UPCE, UPCA, EAN-8, and EAN-13 barcode is neither
decoded nor transmitted. Transmission for these specific symbologies is enabled by setting the appropriate
withAddon options. There are 4 withAddon options, one for each symbology:
 UPCEwithAddon
 UPCAwithAddon
 EAN8withAddon
 EAN13withAddon
The decoding of add-on symbols is typified by the following table, which explains the process for EAN-13
symbols.
Mode Behavior Value of flags
EAN13 EAN13withAddon
Auto-discrimination If add-on symbol is present, then it is also
decoded; otherwise only the EAN-13 symbol
is decoded.
true true
With add-on Only EAN-13 barcodes with 2 or 5 add-on
symbol are decoded.
false true
Without add-on The add-on symbol is ignored. true false
Table 7 - Add-on for EAN-13 Symbology
The add-on symbol is appended to the EAN-13 barcode. The process is similar for UPCE, UPCA, and
EAN-8 barcodes. Note that all the UPCE, UPCA, EAN-8, and EAN-13 formatting and conversion options
are in effect. The following table should help explain the effect of various options for EAN-8 barcode
12345670 + 12.
Barcode
EAN8_as_EAN13 EAN8_ReturnCheckDigit EAN13_ReturnCheckDigit
1234567012
False
True
N/A
123456712 False
00000123456712
True
N/A
false
000001234567012 true
Table 8 - Add-on for EAN-8 Symbology
The add-on symbol neither contains check digit nor a terminating guard band. Every effort has been made
to reduce the decoding error; however, it is likely to decode a partial scan of a 5-digit add-on symbol as a 2-
digit add-on symbol. It is strongly recommended that the minimum security level is set at 2 while decoding
add-on symbols. Since the decoder takes a conservative view on the add-on symbols, it is likely that the
add-on symbol will be missed in the auto-discrimination mode. Auto-discrimination mode should then be
avoided.