Chapter
10
Operating Instructions
CLV 45x Bar Code Scanner
10-62
©
SICK AG · Division Auto Ident · Germany · All rights reserved
8 009 139/K949/06-06-2002
Appendix
Reading field height
Length of the
Ö
scan line that is available for detecting the bar code in the reading plane.
Due to the V-principle of beam generation, it depends on the reading distance.
Reading interval
Time window in which the CLV activates the laser diode and attempts to detect valid bar co-
des from the information read. The reading interval may be shorter than the external reading
pulse, depending on the selected output mode for the read result.
Reading pulse
Pulse applied externally to the CLV to trigger the internal •
Ö
reading interval. Can be supp-
lied by a photoelectric reflex switch or a command from the host via the serial interface.
Reading range (DOF)
Depth of field about the focal point of the laser beam on two sides. The extent of the reading
range depends on the resolution and reading distance.
Read result
Electronic representation of the data contents of the read bar codes together with the
Ö
reading diagnosis data in one
Ö
data output string that is generated after the reading
pulse has elapsed. The read result on the terminal interface has a fixed format in contents
and output format; the read result of the host interface can be configured separately for
good reads and no reads. Special characters can also be added if necessary.
Result status output
Function of the "Result 1" and "Result 2" switching outputs in Reading mode. Signals the
status of the reading result without indicating its contents (e. g.
"
Good Read"). You can
assign a different status to each output in the D
EVICE
FUNCTION
tab card in the CLV-Setup
user interface. The "Result" LED is coupled in its display behavior to the "Result 2" output.
Scan line
See line scanner.
Sending point
Point at which the read result is output with respect to the start of the
Ö
reading pulse and
the internal
Ö
reading interval.
Separator
Data block in the read result of the
Ö
host interface. Used to separate the data contents
of the bar codes. Can be attached to the bar codes as a prefix or suffix. Contains reading
diagnosis data and/or constants (e. g. characters), depending on the configuration (for the
CLV 45x empty by default setting).
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.
