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Chapter
8
Operating Instructions
CLV490 Bar Code Scanner
8-10
©
SICK AG · Division Auto Ident · Germany · All rights reserved
8009993/RA61/2007-07-20
Troubleshooting
8.5.2
Malfunctions in Reading mode: reading trigger errors
¾
Check whether the "Device Ready" LED lights up.
If the LED does not light, see
.
CLV490 in stand-alone configuration
Malfunction
Possible cause
Remedy
1. Trigger mode:
Sensor input
(external sensor).
The CLV490 cannot be clocked:
– the "Sensor" LED does not light up
– the red scan line does not appear
Reading mode "Start/stop" or
"Tracking ":
•
Sensor not connected or connected to
incorrect switching input.
•
If sensor supplied by CLV490: sensor
not connected to ground potential.
•
Incorrect reading pulse source para-
meterized in the CLV490.
•
Polarity of switching input inverted
•
Incorrect debouncing of the switching
input parameterized in the CLV490.
•
Photoelectric switch not aligned with the
reflector (photoelectric proximity switch/
inductive sensor not dampened).
•
The object does not pass the reading
pulse sensor for trigger start with the
conveyor running.
•
Connect sensor to "Sensor" switching
input.
Check sensor wiring (see
).
Measure output signal on sensor.
•
Insert jumper between pin 5 and pin 15
(CDM490: S 1 switch "SGND_GND")
•
In the "CLV-Setup" program: choose the
D
EVICE
C
ONFIGURATION
tab, R
EADING
T
RIG
-
GER
S
OURCE
section: Sensor input select-
ed? (active high: reading pulse starts
when power applied, active low: reading
pulse starts when power removed)
•
See
above
.
•
In the "CLV-Setup" program: choose the
D
EVICE
C
ONFIGURATION
tab, click the
R
EADING
T
RIGGER
P
ARAMETERS
button,
D
EBOUNCING
S
ENSOR
section:
Time controlled: selected value too high?
Track controlled: incremental encoder
connected to "IN 4" switching input?
•
Align sensor.
Check functioning
•
Install reading pulse sensor in front of the
CLV490 in conveying direction. See also
Chapter 4.4.2 Mounting the external rea-
ding pulse sensor, Page 4-11
.
Table 8-6: Troubleshooting: reading trigger errors in Reading mode (CLV490 in stand-alone configuration)
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