Example:
If Max Number of Different Characters = 1:
The code 123456 is considered contained in the following codes:
12305600, 00123056, 8812305688 because there is only one different
character in the compared string.
The code 123456 is not considered contained in 123066789 because there
are two different characters in the compared string.
CAUTION: If the Contained Filter parameter is used
when Message Tx Selection (see section 3) is set to
On Decoding, the filter conditions may be satisfied
before the reading phase ends resulting in possible
successive multiple read errors.
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: 133056, 123546, 123457 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: 153246, 103057, 654321 because there are at
least three different characters by position in the compared codes.
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;
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