Rockwell Automation 2755 AtomScan Bar Code Reader User Manual
Page 61
5–16
Configuring Your Reader
Publication 2755-6.9
Narrow Margins
Allows the reader to read bar codes with quiet zones less than 10
times the narrow-bar-width. Quiet zone is a term used to describe
the minimum space at the leading and trailing ends of a label. Each
quiet zone can be as small as five times the narrow bar element when
Narrow Margins is enabled.
Symbology ID
The symbology ID is a string of 3 characters prefixed to label data
messages. The first character is ]. The ] symbol is used whenever
the option is enabled. The second character indicates the label type.
Refer to the first table below for the label types. The third character
is the sum of the applicable option values per symbology used.
For example, you have code 39 with no character check and data is
1234. When symbology ID is disabled, the result is 1234. When the
symbology ID is enabled, the result is ]A01234.
Label Type Indicator
Equals
A
Code 39
F
Codabar
I
I 2 of 5
E
UPC/EAN
C
Code 128
Code 39 Option Value
Option Definition
0
No check character.
1
Reader has checked the check character.
2
Reader has removed the check character.
Codabar Option Value
Option Definition
0
No check character.
2
Reader has checked the check character.
4
Reader has removed the check character.
I 2 of 5 Option Value
Option Definition
0
No check character.
1
Reader has checked the check character.
2
Reader has removed the check character.
UPC/EAN Option Value
Option Definition
0
Always zero and does not follow the AIM spec.
Code 128 Option Value
Option Definition
0
Always zero and does not follow the AIM spec.