Rockwell Automation 2755 AtomScan Bar Code Reader - Manual (Page 68)

5–23 Configuring Your Reader
Publication 2755-6.9
Scanner Setup Menu
The Scanner Setup menu, shown below, allows you to set specific
bar code scanning parameters that affect decode rate. Default
settings are in bold type face.
Note: Unlike most configuration settings, Scanner Type, Scans per
Second, and Gain Adjustment are not saved for power-on (but are
initialized) when you press
[Y] . To save new settings to NOVRAM
for these parameters, press [<ZP>] .
Scans per Second
➀
– 50
– User Definable
(30 to 55)
AGC Sampling
– Continuous
– Disabled
– Leading Edge
Gain Adjustment
– 45 (nominal)
– User Definable
(10 to 255)
Scanner Setup
Scanner
Type
– Standard
– High Density
➀
Multiply the number entered on the command line by 10 for actual scans per second.
•
Scanner Type. The Scanner Type “default” from the factory
indicates the density type of the reader (with the unit’s optics
adjusted accordingly).
Note: Entering the <Zp> command will save the current setting
for Scanner Type to NOVRAM. If you need to verify the density
type of a unit, see the FIS options.
•
Scans per Second. Allows you to set the number of scans per
second by controlling mirror motor speed. The range is 300 to
550 scans per second.
•
Gain Adjustment. Allows you to specify a gain value for the
analog circuitry. Changes to Gain Adjustment should typically
be done by qualified technicians.
Note: Gain Adjustment is optimized at the factory before
shipment; your default value may not be 45.
Note: Before saving any changes to Gain Adjustment, first
record the optimized factory setting for future reference.
•
AGC Sampling. Allows you to specify how automatic gain
control sampling will be done. Continuous mode continually
samples 14 transitions and stores the highest value of the samples
and adjusts the AGC value at the end of the scan. Leading Edge
mode finds the leading edge by looking for a 40 ms quiet zone
followed by 14 transitions and stores the highest value of the
samples and adjusts the AGC at the end of the scan. Leading
Edge is especially effective when labels are skewed. Changes to
AGC Sampling should typically be done by qualified technicians.