NCR RealPOS User Manual - Code 128 Overlap Characters

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.