Operating Instructions
Chapter
8
CLX 490
8 009 237/0000/07-05-2002
©
SICK AG · Division Auto Ident · Germany · All rights reserved
8-1
Troubleshooting
8
Troubleshooting
8.1
Overview of the possible errors and malfunctions
8.1.1
Mounting errors
•
CLX aligned incorrectly with the object carrying the bar code (e. g. blanking)
•
Reading pulse sensor positioned incorrectly
•
With event-controlled focus control: sensors for object height detection positioned
incorrectly
8.1.2
Electrical installation errors
•
Interfaces on the CLX connected incorrectly (wiring error in AMV/S 60)
•
Host interface on AMV/S 60 configured incorrectly
8.1.3
Parameter errors
•
Functions not adjusted to local conditions, e. g. communication parameters on the host
interface are set incorrectly
•
Technical limits of the device exceeded, e. g. relationship between the scanning
frequency and the reading distance
8.1.4
Malfunctions
•
Laser timeout for incorrectly terminated reading pulse
•
Device error (hardware/software)
8.2
Monitoring error and malfunctions
The CLX is self-monitoring:
•
After the power supply has been switched on, the CLX automatically carries out a self-
test, in which it checks important hardware components, before it is initialized (para-
meter set loaded and device functions initialized). The self-test can be repeated at any
time by cancelling Reading mode. See
Chapter 6.5.8 Self-test, Page 6-22
.
•
If the CLX detects an error during the self-test or at any other time, it outputs the error
status ST=3 on the host interface. Prerequisite: the error status is enabled for transmis-
sion. This is enabled by default. The CLX displays the diagnosed error as a numeric
combination on the terminal interface (see
.
•
While it is in operation, the CLX constantly monitors the laser diode and speed of the
polygon mirror wheel. In addition, a watchdog circuit responds to error statuses. The
CLX carries out distance measurement referencing at regular cycles. To do so, the laser
diode is switched on for max. 10 s.
•
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 CLX 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.
