Datalogic DS8110, Справочное руководство

Страница: 93 / 282

E-GENIUS
81
4
Field Name Action/Definition
Max Number
of Different
Characters Enter a value from 0 to 5 in the field provided to define the maximum number of different
characters allowed to still consider a code as being included in another one and therefore
to be filtered.
If the number of different characters between the compared codes exceeds the value of
this parameter, the codes are considered as different and will not be filtered (a multiple
read of a different code occurs).
If the number of different characters between the compared codes is less than or equal to
the value of this parameter, the short code is considered as a sub-string of the longer
code and will be filtered (no multiple read occurs).
Examples:
If Max Number of Different Characters = 2:
The code
123456 read once, is considered the same as the following codes read
multiple times: 1 3 3 0 56, 123 54 6, 12345 7 because there are two or less different
characters by position in the compared codes.
The code
123456 read once, is not considered the same as the following codes read
multiple times: 1 5 3 24 6, 1 0 3 0 5 7 , 654321 because there are at least three different
characters by position in the compared codes.
Voting Filter Select the check box to reveal the Max Number of Different Characters field.
When checked, this filter attempts to eliminate false multiple reads by comparing the
number of different characters by position between two codes of the same type and
length. This condition implicates that reading a code of the same type and length having
very few different characters is probably a misread of the code itself and therefore the
code read the least number of times should be ignored, (should not be considered as a
multiple read of a different code).
This filter is based upon the following rules:

a multiple read condition occurs;

the two codes are of the same type;

the two codes have the same length;

the number of different characters by position is equal to or less than the number
defined by the Max Number of Different Characters parameter;

Message Tx Selection (see section 3) must be set to After Reading Phase Off .
Filter Out
Low Height
Codes Select the check box to reveal the Minimum Readings Difference Between Scanners
field .
Background: This option was developed for the airports systems where there are often
tall bar height codes and low bar height codes with the same content attached to
baggage. Travelers will often remove the large, tall bar height code, while leaving the
smaller, low bar height codes attached to the bag. The next time they travel they may
have multiple low bar height codes on their baggage plus the new tall bar height and low
bar height codes for the new trip.
This option instructs the system to ignore low bar height codes, which are likely read only
once or twice, in favor of tall bar height codes, which will likely be read multiple times.
This is used in tunnel applications where multiple barcodes are read and there is a need
to filter out one of the barcodes. If less than
x number of scanners read the barcode,
then it will be considered a NOREAD for that code.