Chapter 6: Special Programming 6-3
Enable/Disable Code 128 Partials
When decoding Code 128 using partial scans, sometimes a Decode error is generated.
However, several conditions must occur to cause the misread. If having problems reading
Code 128 bar codes, try disabling partials.
Disable Code 128 Partials—Program Mode, Hex 1, Hex 7, Hex F, Hex 0, and Save and
Reset
Enable Code 128 Partials—Program Mode, Hex 1, Hex 7, Hex F, Hex 1, and Save and
Reset
Code 128 Overlap Characters
The 7893 can put together partial scans to identify a Code 128 bar code. Decoding partial
scans is more secure with more overlap characters. The number of overlap characters can be
programmed from one to four; two is the default.
1. 1 Overlap Character—Programming Mode, Hex 6, Hex B, Hex D, Hex 1, Save and
Reset
2.
2 Overlap Characters—Programming Mode, Hex 6, Hex B, Hex D, Hex 2, Save and
Reset
3.
3 Overlap Characters—Programming Mode, Hex 6, Hex B, Hex D, Hex 3, Save and
Reset
4.
4 Overlap Characters—Programming Mode, Hex 6, Hex B, Hex D, Hex 4, Save and
Reset
EAN/JAN/UPC Multi-Symbol Scanning Parameters
The optional Multi-Symbol programming feature permits you to scan bar code labels
containing two or three EAN-13, JAN-13, or UPC-A symbols.
Label Construction
A multi-symbol label must consist of any combination of two or three EAN-13, JAN-13, or
UPC-A symbols, each with different flag digits. Flag digits are the first two digits of the
symbol on EAN-13/JAN-13 symbols. Flag digits for UPC-A symbols always have a zero (0)
for the first digit with the number system character being the second digit. There is NO
restriction on which flag digits may be used. A total of five multi-symbol combinations can be
programmed.
Single Label Restriction
A single-symbol with the same flag digits as programmed for any 2-symbol labels cannot be
scanned as a single-symbol label.
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