Chapter
10
Operating Instructions
CLV 42x bar code scanner
10-44
©
SICK AG · Division Auto Ident · Germany · All rights reserved
8 009 981/O078/16-08-2004
Appendix
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 “Code Info/
Separator“ block of the
data output string and must be enabled using the parameters
(disabled by default in the CLV 42x).
Focus position
Distance of the focal point of the emitted laser beam in front of the reading window. Creates
a distance-specific depth of field (DOF) in which the bar code can be recorded.
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 evaluation parameters during the
reading pulse.
Header
Data block in the reading result of the
host interface. Used as a header in the data
output string for the subsequent data content of the bar code. Contains up to 10 elements,
consisting of reading diagnosis data and/or constants (control characters, letters, digits).
The “Header“ block is empty in the default setting of the CLV 42x.
Host Interface
Main data interface on the CLV with configurable data output format. Used to output the
reading result in telegram form to the host/PLC. Integrates the CLV in the SICK network
or builds a master/slave arrangement. Can be physically switched to RS 232 or RS 422/
485. It supports various transfer protocols.
Increment management
Used in certain applications 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 fast. 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.
Master/slave configuration
Special arrangement for connecting up to max. 10 CLVs in the CAN scanner network to one
reading station (e. g. left/right read). Thanks to the master, the entire network appears as
one device to the host.
Multiple read
Variable number of reading operations that must provide identical reading results (data
content) of the same bar code before the CLV outputs the result.
No Read
The CLV failed to detect a bar code or the required number of bar codes specified by the
evaluation parameters during the reading pulse.
