Chapter
6
Operating Instructions
CLV 490 Bar Code Scanner
6-44
©
SICK AG · Division Auto Ident · Germany · All rights reserved
8 009 993/O824/20-12-2004
Operation
Note
In default setting, the CLV operates in the autofocus mode "Minimum distance“. As a result,
the CLV focuses on the object that is nearest in Percentage Evaluation mode. The view on
the object with the scan line must be unobstructed, i. e. any other objects must not protude
into the autofocus space. If they do so, the autofocus mode "Differential background“ must
be selected. Alternatively a fixed focus position can be set. See
.
The output format of the reading result is the same as that of the Reading mode.
explains the structure and function of the reading diagnosis data
The ”Read Result” LED also provides information on the reading quality:
–
The LED is extinguished if reading quality is < 30 %
–
The LED blinks twice per second if the reading quality is 30 % to 70 %
–
The LED blinks five times per second if the reading quality is 70 % to 90 %
–
The LED is lit continuously if the reading quality is > 90 %
6.5.3
Adjusting mode
The Adjusting mode enables the center of the scan line to be optimally positioned on the
bar code.
Chapter 4.3.3 Adjusting mode, Page 4-9
describes the procedure for going about
this after the Adjusting mode has been called up. The CLV does not output a reading result
in this mode. The "Result 1" to "Result 4" switching outputs do not become live.
The Adjusting mode can be called up by choosing V
IEW
in the menu bar, as a device
function via CLV 490 (interactively), or via the Terminal Emulator.
Line scanner with oscillating mirror:
In the "Adjusting" mode, the CLV behaves in the following manner:
–
In "Oscillating" mode (default setting: oscillating with a fixed amplitude), the CLV shuts
of oscillation and positions the scan line under the angle CW = 50 (corresponds to an
angle of deflection below 105
°
). This position cannot be altered.
–
In "One-Shot" mode, the CLV positions the scan line under the angle CW = 50
–
In "Fixed Position" mode, the scan line’s selected position remains unchanged.
1.
Click
in the toolbar.
The Terminal Emulator window is then displayed. The CLV is in the Reading mode.
2.
In the D
EVICE
M
ODE
section, choose A
DJUSTING
M
ODE
.
The "Device Ready" LED is extinguished. The CLV cancels the Reading mode and
blanks the red scan line as of position CP = 50 to position CP = 100.
3.
Choose R
EADING
M
ODE
to exit the Adjusting mode.
The CLV returns to the Reading mode and the "Device Ready" LED lights up.