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Operating Instructions
Chapter
10
CLV 490 Bar Code Scanner
8 009 993/O824/20-12-2004
©
SICK AG · Division Auto Ident · Germany · All rights reserved
10-89
Appendix
Result status output
Function of the four "Result 1" to "Result 4" switching outputs in Reading mode. Signals the
status of the reading result without indicating its contents (e. g. Good Read). You can assign
a status to each output on the D
EVICE
F
UNCTION
tab in CLV. The "Read Result" LED is linked
to the "Result 2" output.
Scan line
See line scanner.
Sending point
Point at which the reading result is output with respect to the start of the
Ö
reading pulse
and the internal
Ö
reading interval.
SICK network
Special, high performance network of max. 31 CLVs with high data transfer rates on the
RS 485 interface. The CLVs are coordinated (polling) and connected to the host via the
CLX 200 Network Controller.
SMART decoder
Specially developed
Ö
decoder for reading bar codes with an extremely small code height
and for poor-quality or contaminated code prints.
Specification diagrams
Diagrams for reading the resolution-specific depth of field (DOF) for specific focus positions.
Splitter
Data block in the reading result of the
Ö
host interface. Used to separate the data content
of the bar codes. Contains up to 5 elements, consisting of constants (control characters,
letters, digits), depending on the configuration. The "Splitter" block is empty in the default
setting of the CLV 490.
Standard decoder
Tried-and-tested
Ö
decoder from the CLV product family. Suitable for applications with an
adequate code height, limited tilt, and high-quality code prints.
Start/stop mode
With this type of separate reading pulse, only one object is located in the reading field for
each reading pulse. If the CLV is used in a stand-alone configuration, the start and end of
the reading pulse are controlled by external sensors, command strings, or with the free run-
ning mode of the CLV. If used in conjunction with other CLVs in a master/slave arrangement
including the OTC 400 (e.g. omnidirectional 2-side reading), the CLV receives the reading
pulses via the OTC 400. In this case, the size of the reading field is determined by the dis-
tance between the two external sensors for starting (start of reading field) and stopping (end
of reading field) the reading pulse. The minimum reading distance between two objects must
always be greater than the size of the reading field. The devices are connected via the CAN
interface.
Storage in the CLV
The application-specific
Ö
parameter set can be stored temporarily or permanently in the
CLV. If it is stored temporarily in the RAM, it is lost as soon as the power supply is switched