Operating Instructions
Chapter
6
CLV490 Bar Code Scanner
8009993/RA61/2007-07-20
©
SICK AG · Division Auto Ident · Germany · All rights reserved
6-41
Operation
Triggering the reading pulse via the Terminal Emulator
In the default setting the "Sensor" switching input is the (external) trigger source of the
reading pulse. The reading pulse can also be triggered directly via the Terminal Emulator of
CLV-Setup for test purposes. To do so, a different trigger source must be selected
temporarily in the CLV490.
1.
Choose D
EVICE
C
ONFIGURATION
tab.
2.
In the R
EADING
T
RIGGER
M
ODE
section click the S
ERIAL
I
NTERFACE
option.
3.
Perform a download to the CLV490.
To do so, click the S
ERIAL
I
NTERFACE
option again with the right mouse button and choose
D
OWNLOAD
P
ARAMETER
in the context menu.
CLV-Setup copies the parameter to the CLV490 temporarily.
The serial interface has been activated as the trigger source of the reading pulse and
is ready to receive appropriate commands (until the CLV490 is switched off).
4.
Click
in the toolbar.
The Terminal Emulator window is then displayed.
The CLV490 is in the Reading mode.
5.
Click the SW-T
RIGGER
O
N
button or press [F7].
CLV-Setup sends a start command to the CLV490.
The "Sensor" LED lights up and the red scan line appears.
6.
Present the bar code pattern from
to the CLV490.
7.
Click the SW-T
RIGGER
O
FF
button or press [F8].
CLV-Setup sends a stop command to the CLV490. The "Sensor" LED is extinguished.
The CLV490 switches off the laser diode. The CLV490 displays the reading result in the
output window of the Terminal Emulator. The "Read Result" LED lights up for a duration
of 100 ms (default setting).
6.5.2
Percentage evaluation
In the Percentage evaluation mode, the quality of the reading function is assessed (no
conveyor movement).
The CLV490 performs continuously 100 scans in the free running mode and evaluates the
reading quality. It outputs the reading result every 2 s via the
auxiliary interface
. The
reading results can be displayed in the Terminal Emulator of CLV-Setup. The "Result 1" to
"Result 4" switching outputs do not become live in the Percentage evaluation mode.
The
standard
decoder
has to be set temporarily for the percentage evaluation.
The Percentage evaluation mode can be called up by choosing V
IEW
in the menu bar, as a
device function via CLV490 (interactively), or via the Terminal Emulator.
Note
Autofocus mode:
If the CLV490 operates with autofocus in stand-alone configuration, the Percentage
evaluation mode can only be started in the Autofocus mode "Minimum distance" or
"Differential background". The CLV490 fixes the timeout of the automatic focus position
switchover to 30 ms, the preferred focus position is set to the last recognised object.
If the CLV490 operates with autofocus in OTS mode ("Differential background and
tracking"), the CLV490 switches automatically to the autofocus mode "Differential
background“ during the the Percentage evaluation mode.
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