Chapter
10
Operating Instructions
CLV 45x Bar Code Scanner
10-60
©
SICK AG · Division Auto Ident · Germany · All rights reserved
8 009 139/K949/06-06-2002
Appendix
Focal position
Distance of the focal point of the emitted laser beam in front of the reading window. Can be
adjusted via the optic. Creates a distance-specific depth of field (DOF) in which the bar code
can be detected.
Focal position changeover
Property of the CLV for shifting the focal point of the laser beam across a wide range in the
reading plane. The focal position changeover is event-controlled (e. g. by the
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distance
detection).
Functional interfaces
Switching inputs and outputs on the CLV.
Good read
The CLV successfully detected a bar code or the required number of bar codes specified by
the parameterized evaluation conditions during the
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reading pulse.
Header
Data block in the read result of the
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host interface. Used as a header in the
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data output
string for the subsequent data contents of the bar codes. Contains reading diagnosis data
and/or constants (e. g. characters), depending on the configuration (for the CLV 45x empty
by default setting).
Host interface
Main data interface of the CLV with configurable data output format. Used to output the
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read result in message form to the host/PLC. Integrates the CLV in the SICK network or
builds a master/slave arrangement. Physically switchable to RS 232 or RS 422/485. It sup-
ports various transfer protocols.
Increment management
Used in certain applications in CLV to separate bar codes with identical contents that move
during the reading procedure and assign them to the objects.
Line scanner
Scanner that uses a polygon mirror wheel with paraxial mirrors to deflect a focused laser
beam extremely rapidly. As a result, it creates a light spot in the reading plane that moves
along a straight line, which appears to the naked eye as a stationary scan line due to its re-
lative inertia.
Line scanner with oscillating mirror
Line scanner that also deflects the laser beam about a central position, on both sides
and perpendicular to the scan direction using an oscillating mirror. By doing so, the CLV can
search for bar codes in larger areas and ranges. In addition to basic deflection with the
maximum oscillating amplitude, optimum oscillating mirror functions are also possible
(variable deflection per distance configuration,
Ö
One-Shot).
Master/slave configuration
Special arrangement for connecting up to max. eight CLVs to one reading station (e. g. left/
right read). Via the master the entire network appears as one device to the host.
