Rockwell Automation 2755 AtomScan Bar Code Reader - Manual (Page 57)

5–12 Configuring Your Reader
Publication 2755-6.9
•
External Trigger Level. Allows you to determine whether a
positive or negative transition will initiate the read cycle.
Note: External Level, External Edge, or Serial Data & Edge
must be enabled for External Trigger Level to take effect. “N/A”
is displayed in the menu when all other triggering modes are
enabled.
•
Trigger Filter. Allows you to set a trigger bounce filter duration.
•
Good Decode Reads. Allows you to select the number of good
reads (from 1 to 31) required per label before a good decode
output.
Note: Be sure to set the value within the determined scan rate for
the scanning setup so that the reader is capable of scanning a label
the required number of times.
•
Match Code Type. When enabled, allows you to enter a master
label into the reader’s memory to be compared with subsequently
scanned labels. The Match Code Types are listed in the table
below.
Selecting Causes
Disabled no effect on reader operation.
Enabled the reader to compare labels or portions of labels with the master label.
Sequential
the reader to compare labels or portions of labels for sequential numbers in
ascending or descending order.
Wild Card
you to enter user defined wild card characters in the master label. For example, you
have a ten digit label of which only the first six digits “URGENT” need to match. You
can enter URGENT**** as your master label, assuming of course that the wild card is
currently defined as the default asterisk (*).
With Match Code Type enabled, a master label can be entered
three ways as shown on page 5–13.
Note: A triggered mode must be enabled for Match Code Type
to take effect.
Note: Enabling Match Code Type when Number of Labels is set
to any number greater than one will cause Number of Labels to
default back to one.
Note: If you wish to send a pulse on a Good Read, Match Code
Type must be disabled.