Programming Your 7890 Scanner
Label Identifiers
User’s Guide
5-57
The Common Byte parameter selects which common
bytes, if any, to add to the bar code data message. Each
entry is unique to the previously specified Bar Code
Type. Scan the Hex 0 tag for no Common Bytes, the
Hex
1 tag for Common Byte 1, the Hex 2 tag for
Common Byte 2, or the Hex 3 tag for both Common
Bytes. The default for this parameter uses Common
Byte 2 as a suffix for Code 39, Code 128, and Interleaved
2 of 5 bar code data. UPC and EAN bar codes do not
use Common Bytes.
The Unique Identifier parameter permits you to specify
the data sent to the host terminal or PC in the Unique
Identifier field. Each entry is unique to the previously
specified Bar Code Type. Input this data as two Hex
characters. Refer to the ASCII Code Chart in Appendix A;
however, values of 20 to 7E are recommended. Using
the same characters as the Terminator Byte causes the
message to terminate too soon. The following table
gives the default values
Hex Tag
Bar Code Type
Hex
ASCII
0
UPC-A
41
A
1
UPC-D
44
D
2
UPC-E
45
E
3
EAN-8
46
F
4
EAN-13
47
G
5
Code 39
31
1
6
Code 128
33
3
7
Interleaved 2 of 5
32
2
Common Byte
Unique Identifier
Содержание 7890
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