Operating Instructions
Chapter
2
CLV 45x Bar Code Scanner
Safety information
8 009 139/K949/06-06-2002
©
SICK AG · Division Auto Ident · Germany · All rights reserved
2-3
Internal protective circuits
The CLV has monitoring circuits which shut off the laser diode when irregularities occur in
the beam generation.
The switching on and off of the laser diode during the reading process is controlled by the
reading pulsing (pulse source).
In the pulsing types "Sensor input" and "Serial interface" a timer (laser timeout) switches off
the laser diode automatically 10 min (default setting) after the beginning of a lasting reading
pulse during reading mode. However it does not terminate the reading pulse. CLV outputs
the following message via the terminal interface:
"Laser safety timeout"
The reading pulse has to be terminated by means of a corresponding pulse signal. The next
reading pulse re-activates the laser diode.
The laser timeout can be set in the range of 1 min ... 25 h or de-activated (refer to
).
The laser diode is always active in reading mode in the operating modes "Percentage
evaluation", "Adjusting mode", "Show CP limits" and "Auto setup" as well as in the
"free-running" pulsing type.
2.4Quick Stop and Quick Restart
2.4.1
Switching off the CLV
¾
Switch off the supply voltage or pull off the cable plug of the CLV from the connection
module.
At most the following may be lost:
•
The application-specific parameter record, if it was only saved
temporarily
in the CLV
•
The last reading result
•
Day operating data
(operating hours counter, trigger count, number of good reads, maximum duration
trigger, minimum duration trigger, average identification quality)
2.4.2
Switching on the CLV again
¾
Switch on the supply voltage or pin up again the cable plug of the CLV to the connection
module.
The CLV restarts operation with the parameter record
last saved permanently
and re-
sets the day operating data.