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Chapter
8
Operating Instructions
CLV490 Bar Code Scanner
8-12
©
SICK AG · Division Auto Ident · Germany · All rights reserved
8009993/RA61/2007-07-20
Troubleshooting
4. CLV490 does not respond to an
external signal that ends the reading
pulse (sensor input, serial interface)
Reading mode "Start/stop":
Trigger mode: one external sensor
•
Incorrect end of reading pulse para-
meterized in the CLV490.
•
No signal from the sensor at the
"Sensor“ switching input.
Trigger mode: two external sensors
•
If "IN 4“ switching input is choosen as
trigger source for end of reading interval:
no sensor connected or polarity inverted.
•
The object does not pass the reading
pulse sensor for trigger start with the
conveyor running.
Trigger mode: serial interface
•
Incorrect command used.
•
Laser timeout exceeded.
•
In the "CLV-Setup" program:
choose the D
EVICE
CONFIGURATION
tab,
click the R
EADING
T
RIGGER
P
ARAMETERS
button.
E
ND
OF
R
EADING
I
NTERVAL
section: is "gen-
erated by Trigger Source" selected?
•
Check wiring of the sensor
(
).
Measure output signal of the sensor.
•
Connect sensor to the "IN 4“ switching
input. Check wiring of the sensor (see
Chapter 5.5.7 Connecting the "Sensor"
switching input, Page 5-22).
Choose the D
EVICE
CONFIGURATION
tab,
A
SSIGNMENT
OF
I
NPUTS
section: is "IN 4"
selected (active high or active low)?
Click the R
EADING
TRIGGER
P
ARAMETERS
but-
ton, E
ND
OF
R
EADING
I
NTERVAL
section: is
"generated by IN 4“ selected?
•
Install reading pulse sensor in front of the
CLV490 in conveying direction.
See also
Chapter 4.4.2 Mounting the ex-
ternal reading pulse sensor, Page 4-11
•
See
2. Remedy
•
See remedy in
.
5. CLV490 does not terminate the reading
clock or terminate the clock too late
Reading mode "Tracking":
•
Incremental encoder not connected or
connected to the wrong switching input.
•
If incremental encoder supplied by
CLV490: encoder not connected to
ground.
•
Incorrect reading mode parameterized
in the CLV490.
•
Incorrect resolution of incremental en-
coder parameterized in the CLV490.
•
No conveyor motion (CLV490 does not
receive incremental signals).
•
Laser timeout exceeded.
•
Connect incremental encoder to the
"IN4“ switching input. Check wiring
(
). Check the output
signal of the incremental encoder.
Choose the D
EVICE
CONFIGURATION
tab,
A
SSIGNMENT
OF
I
NPUTS
section: IN 4:
"Conveyor increment" selected?
•
Insert jumper between pin 5 and pin 15
(CDM490: S 1 switch "SGND_GND").
•
In the "CLV-Setup" program:
Choose the D
EVICE
CONFIGURATION
tab,
R
EADING
T
RIGGER
S
OURCE
section: "Sensor
Input" selected? I
NTERNAL
T
RACKING
sec-
tion: "active" selected?
•
In the "CLV-Setup" program:
I
NTERNAL
T
RACKING
section: "Distance per
encoder pulse" correctly selected?
•
Start the conveyor.
•
See remedy in
.
Malfunction
Possible cause
Remedy
Table 8-6: Troubleshooting: reading trigger errors in Reading mode (CLV490 in stand-alone configuration) (contd.)
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