Operating Instructions
Chapter
2
CLV 490 Bar Code Scanner
8 008 796/0000/25-06-2002
©
SICK AG · Division Auto Ident · Germany · All rights reserved
2-3
Safety information
Note
A set of laser warnings in German/US English and French/US English is included in the
delivery scope. The GB English/US English warnings can be pasted over with these if
necessary.
If the CLV is installed in a machine/panel with the result that the laser warning labels
are no longer visible, additional warnings (not included in the scope of delivery) must
be provided on the machine beside the emergence aperture of the laser beam.
Internal protective circuits
The CLV is equipped with monitoring circuits that deactivate the laser diode in the event of
a malfunction.
Activation and deactivation of the laser diode is controlled by the reading pulse trigger.
A timer (laser timeout) automatically deactivates the laser diode in Reading mode ("Sensor
input" and "Serial interface" trigger mode) if the reading interval has not ended after
10 minutes (default setting). However, it does not end the reading interval. In this case, the
CLV outputs the message:
"Laser safety timeout"
on the terminal interface. The reading interval must be terminated by resetting the trigger
signal. The laser diode is activated again by the next reading trigger.
In the Percentage Evaluation mode, Adjusting mode and Show CP-limits as well as in
the Free-running Reading mode the laser diode is constantly activated.
Note
In the Reading mode, the CLV carries out a distance measurement referencing at regular
intervals. During referencing, it turns the laser diode on for a maximum of 10 seconds.
2.4
Quick stop and quick restart
2.4.1
Stopping the CLV
¾
Switch off the power supply.
This can result in loss of the following (at the most):
•
The application-specific parameter set, if it was stored
temporarily
in the CLV
•
The last reading result
•
Daily operating data
(operating hours counter, number of reading intervals, Good Read count, maximum
duration trigger, minimum duration trigger, average identification quality)
2.4.2
Restarting the CLV
¾
Switch on the power supply.
The CLV resumes operation with the parameter set that was
last stored permanently
and reset the daily operating data.