Operating Instructions Chapter 10
CLV 42x bar code scanner
Appendix
8 009 981/O078/16-08-2004 © SICK AG · Division Auto Ident · Germany · All rights reserved 10-45
No Read format
Special, parameterizable data block as a substitute for bar codes, which were expected but
not detected, in the data output string on the host interface for no reads. Comprises a
variable combination of the error string and the “Code Info/Separator“ block.
Parameter set
Data record used to initialize and activate the functions implemented in the CLV. With
downloading and uploading, the parameter set is transferred from CLV Setup to the CLV
or from the CLV to CLV Setup.
Percentage Evaluation
Special operating mode in which the quality of the reads (but not the bar codes) is assessed
statistically. The bar codes must be stationary. The CLV carries out 100 scans and evaluates
the reading quality. It then outputs the reading results on the terminal interface every 2 s
together with the reading diagnosis data.
Plain text
Legible form of a CLV message. The CLV outputs special messages in coded form, e. g. the
result of the self-test is represented as three digits.
Profile bar code
Special bar codes that are created and printed using the CLV Setup program. They
contain coded parameters/parameter values from the parameter set. The profile bar codes
can be used to configure the CLV with its optical interface (reading window) instead of a PC.
Raster height
Distance between the first and last of the eight parallel scan lines for the raster scanner.
The raster width is the distance between two adjacent scan lines.
Raster scanner
Scanner that uses a polygon mirror wheel with eight tilted mirrors to deflect its focused laser
beam extremely quickly. As a result, it creates a light spot that moves quickly in eight rows
across the reading plane.
Each light spot repeatedly moves along a straight line. It thereby appears to human eyes as
one of eight stationary scan lines.
Reading area (DOF)
Depth of field around the focal point of the laser beam on two sides. The extent of the
reading range depends on the resolution and reading distance.
Reading diagnosis data
Data directly derived from the reading procedure by the CLV. This data enables the quality
of the read to be assessed. The data is always output on the terminal interface together
with the reading result. Only output on the host interface if enabled on the
DATA STRINGS tab
in the CLV Setup program (disabled by default for CLV 42x).
Reading field height
Length of the scan line that is available for detecting the bar code in the reading plane.
Due to the V-principle of beam generation, the reading field height is dependent on the
reading distance.
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