Rockwell Automation 2755 AtomScan Bar Code Reader - Manual (Page 84)

5–39 Configuring Your Reader
Publication 2755-6.9
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Scanner Setup Status Report. Allows you to return the status of
each command in the group.
Parameter Format
KU <KU?>
To test the decode rate:
1. Position the label in front of a functioning reader.
2. Press [<C>] from the host terminal to launch the decode rate test.
3. Observe decode rate.
4. Check depth-of-field (minimum/maximum range) by moving the
label closer and further relative to the reader and noting the points
where the decode rates fall below a level acceptable to your
application. The label used in your application should pass
through or near the center of the depth-of-field.
5. Repeat steps 1 through 5 for other labels used in your application
and end the decode rate test by pressing [<J> ].
If the decode rate is acceptable, no adjustments are needed to your
reader. If the decode rate is unacceptable, adjust your reader
parameters.
Note: If, after making adjustments, you have changed the read range
or another parameter used in the number of scans formula, you
should recalculate the number of scans.
Note: Variations between labels are common. For this reason, the
greater number of sample labels you test, the more likely you are to
achieve optimum decode rates.
To help improve decode rates, adjustments can be made in the
following areas.
Scan Rate
Scan rate is a function of motor speed and is adjustable from 300 to
550 within the Scanner Setup menu. The reader is factory set at the
rate of 500 scans per second. A slower scan rate may allow greater
label range and/or higher decode rates, but at the cost of fewer scans
per label. To adjust the scan rate (motor speed), press
[<D>] and
select the Scanner Setup menu.
Decode Test
Adjusting Reader
Parameters