Operating Instructions
Chapter
8
CLV 42x bar code scanner
Troubleshooting
8 009 981/O078/16-08-2004
©
SICK AG · Division Auto Ident · Germany · All rights reserved
8-5
8.5
Troubleshooting
The following are required for troubleshooting purposes using the tables
below:
•
These Operating Instructions
•
Tools
•
A tape measure (up to 1 m (39.4 in))
•
A digital measuring device (ammeter/voltmeter)
•
A PC running "CLV Setup"
•
A 3-core RS 232 data cable (null modem cable), pins 2 and 3 crossed,
e. g. no. 2 014 054
8.5.1
General malfunction: CLV not ready
F
The C
HECK
M
IN
. N
UMBER
OF
C
ODES
function is active.
The number of valid codes detected
by the CLV in Reading mode is less
than that specified under N
UMBER
OF
C
ODES
: M
INIMUM
.
Instead of the code contents, it
outputs the defined error string in the
quantity defined under N
UMBER
OF
C
ODES
: M
INIMUM
One object in a set of objects with a
constant number of codes, for example,
contains fewer codes than defined in the
application.
This message is used to indicate
errors on the objects (e. g. check
whether objects are homogeneous:
mix with incorrect objects).
Value
Meaning
Possible cause
Remedy
Table 8-2: Meaning of the ST error status in the reading result (contd.)
Malfunction
Possible cause
Remedy
The "Device Ready" LED is not lit.
The "Device Ready" switching output
(default setting: "Good read") is not
outputting a pulse.
After switching on the power supply
(10 to 30 V DC):
•
CLV not supplied with operating voltage
•
The CLV has diagnosed a device error in
the self-test
During operation:
•
The CLV is not in "reading" mode
•
The CLV has deactivated the laser diode
10 min (default setting) after the start of
the current reading pulse (pulse mode:
sensor input/serial interface)
•
Check wiring (power connector fitted
securely to the CDB 420 or CDM 420
connection module).
Measure voltage at pin 1 and pin 5.
•
Switch the CLV off and on again. Does
the LED light up? If not, contact the SICK
Service department.
•
Return to reading mode using the
CLV Setup program
See
(standard operating mode), Page 6-14
.
•
Terminate reading pulse.
Check the reading pulse function.
Generate new pulse or parameterize
new laser timeout duration using the CLV
Setup user interface.
See
Parameterization guide, Page 6-7
Table 8-3: Troubleshooting: restoring operation (reading mode)
