Omron V440-F, Руководство пользователя

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4 Setup
4-32 V440-F C-Mount Code Reader User Manual
Wildcard
mode gives you the ability to use wildcards and placeholders to search for matches. By
default the Wildcard is
*
and the Placeholder is
?
You can use these wildcard and placeholder definitions when they input text into the
Match String
Database
.
A
wildcard
represents one or more characters of any type. For instance,
*TEST*
looks for the text
"TEST" in barcode data with any amount of characters before or after it.
*TEST
looks for the text "TEST" in barcode data with any number of characters before it, but "TEST" at
the end.
TEST*
looks for the text "TEST" at the beginning of the barcode data, with any number of characters
after it.
If you had a barcode with data
1234567
and tried to match to the entire data string using
123
*, you
would have a successful match.
If you tried to match that same barcode data using
*123
, you would be unsuccessful because
123
appears at the beginning of the barcode. It’s important to remember that the wildcard character
*
always stands for one or more unknown characters.
Now try to match a portion of the barcode you’re scanning by using *
YOURTEXT
*. If the text
"YOURTEXT" appears somewhere in the middle of the barcode, the match will be successful.
A
placeholder
represents one character of any type. For example,
???TEST
tries to match a barcode
that contains three characters of any type followed by the text "TEST".
???TE?T
attempts to match a
barcode that contains an unknown character where the 'S' previously appeared.
Placeholders and wildcards can also be used together in the
Match String Database
input fields. The
concepts of both are still the same: a wildcard represents one or more unknown character, and a
placeholder represents exactly one unknown character.
Wildcard Mode