Opticon PHL-7100 User Manual page 78

Positive / Negative
bar codes
Table 3-5 Read mode options descriptions
3.2.1.6 Advanced TAB
If enabled, this field can be used to send serial commands to the bar code reader.
Use this option only in case you want to access bar code reader features which are not
documented in this user's manual, but are documented in Opticon's Universal Menu Book.
If there is no need to make any other change to the bar code reader settings, do not use this
option. A maximum of 180 characters can be input. Default this option is disabled.
Read 1 time
Read 2 times
Read 3 times
Read 4 times
Usually bar codes are printed black on white, but sometimes
white on black. These labels are called positive and negative
respectively. In case the 'negative bar codes' option has been
selected, positive labels may not be decoded or with difficulty.
Positive bar codes
Negative bar codes
Positive and
negative bar codes
Figure 3-18 Command line options.
Redundancy = 0
Redundancy = 1 (default)
Redundancy = 2
Redundancy = 3
Read black on white labels only (default)
Read white on black labels only
Read positive or negative labels
automatically.
3-15
OPTICON
User's manual
PHL-7000 series