Operating Instructions
Chapter
10
CLV 45x Bar Code Scanner
Appendix
8 009 139/K949/06-06-2002
©
SICK AG · Division Auto Ident · Germany · All rights reserved
10-59
Decoder, decoding
Code-type-specific evaluation routine for reconstructing the read bar code in electronic form
in order to decode its data content.
Deflection angle
Angle about each side of the center position CW = 50 (equal to 0 ) that the
Ö
scan line
sweeps when it is deflected by the oscillating mirror. Also referred to as the oscillating angle.
Deflection range
Deflection of the scan line caused by the
Ö
oscillating mirror, perpendicular to the scan di-
rection about the center position CW = 50 at each side (corresponds to a deflection angle
of 105 ). Also referred to as oscillating amplitude. The maximum deflection range is set in
O
SCILLATING
WITH
FIXED
AMPLITUDE
mode. In O
SCILLATING
WITH
VARIABLE
AMPLITUDE
mode, the de-
flection range is set for each distance configuration using the O
SCILLATING
MIRROR
tab card in
the CLV-Setup program.
Distance configuration
Data record in the CLV for defining a
Ö
focal position for the laser beam for
Ö
focal position
changeover. The focal position as well as the maximum and minimum
Ö
code position must
be entered in the R
EADING
CONFIGURATION
tab card of the CLV-Setup user interface for this
purpose. In the case of the line scanner with oscillating mirror, the
Ö
oscillating amplitude
(deflection range) is also required. The depths of field for the individual focal positions are
shown as a function of the resolution values in the specification diagrams.
Distance detection
System for detecting the distance of objects with a bar code in front of the CLV in 2 stages.
When the bar code is read from above, for example, the distance is detected by installing a
photoelectric reflex switch beside the conveyor belt. The two ranges for the
Ö
focal position
changeover are defined by using the distance detection as well as the "Sensor 1" switching
input and the assignment table for the
Ö
distance configurations.
Download
Method of transferring the
Ö
parameter record that was modified with the
Ö
CLV-Setup
user interface from the PC to the CLV. CLV-Setup either always transfers a complete copy
to the RAM of the CLV (D
OWNLOAD
TO
CLV) or only the parameter currently being edited by
means of the pop-up menu called up with the right-hand mouse button (D
OWNLOAD
PARAME
-
TER
). You can overwrite the existing parameter record in the EEPROM of the CLV by choosing
the "Permanent" storage option.
Error messages
Messages in
Ö
plain text that are used by the CLV to identify a diagnosed error in Reading
mode. The messages are output on the terminal interface only. Exception: Output of ST = 3
(device error), which is also output via the host interface. The error messages can be dis-
played in extended mode of the
TERMINAL
EMULATOR
in the CLV-Setup user interface.
Error status
Identifier output with the reading result by the CLV for errors that were diagnosed while the
bar code was being read. The entry for the host interface is made in the separator of the
Ö
data output string and must be enabled by means of the parameters (for the CLV 45x disab-
led by default setting).