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Operating Instructions
Chapter
8
CLV490 Bar Code Scanner
8009993/RA61/2007-07-20
©
SICK AG · Division Auto Ident · Germany · All rights reserved
8-7
Troubleshooting
8.4
ST error status in the reading result of a bar code
Value
Meaning
Possible cause
Remedy
0 Good
Read.
–
Not
applicable.
2
No bar code of the enabled code type
found according to the evaluation
criteria.
•
No bar code in the CLV490‘s reading
field during the reading pulse
•
Code type/length in the CLV490 not
enabled for decoding
•
Reading window obstructed/dirty
•
Synchronize the pulse of the CLV490
with the entry of a bar code into the
reading field.
•
Correct the code configuration para-
meters.
•
Check the reading window.
3
Device fault.
Device fault.
Call up the self-test. See
If result
≠
15000: Contact the SICK
Service department.
5
Required number of successful multiple
reads for the bar code not reached.
•
Conveyor speed of the object is too
high
•
Scanning frequency is too low
•
Ladder-type arrangement for bar
code relative to the conveyor direc-
tion: code height (bar length) too poor
•
Print quality too poor
•
Check the conveyor speed.
•
Adjust the scanning frequency.
•
Check the code height.
•
Check the print quality.
6
Master:
Number of slave reading results does
not match the parameterized number of
slaves.
•
The parameterized number of slaves
does not match the actual number of
slaves available
•
The master timeout is too short
•
The data connection between the
slaves and/or the master has been
interrupted
•
Check the entered number of slaves.
•
Check the master timeout setting.
•
Check the cables between the slaves
and the master.
7
The source of the reading result is the
auxiliary input via the auxiliary interface.
The bar code was not detected by the
reading function of the CLV490, but was
entered subsequently with the auxiliary
function of the auxiliary interface and
sent to the host in a separate data
string.
–
9
The O
UTPUT
F
ILTER
function is activated
for the code comparison. The CLV490
has detected valid bar codes. However,
these do not match the active match
code(s).
The scanned object does not have a bar
code that matches the specified match
code.
–
A
The C
HECK
M
AX
. N
UMBER
OF
C
ODES
function is active. The number of valid
bar codes detected by the CLV490 in
Reading mode exceeds that specified
under N
UMBER
OF
C
ODES
: M
AXIMUM
.
It repeatedly outputs the defined error
string until the number specified under
N
UMBER
OF
C
ODES
: M
INIMUM
is reached.
One object in a set of objects with a
constant number of bar codes, for
example, contains more bar codes than
defined in the application.
This message is used to indicate
errors on the objects (e. g. check
whether objects are homogeneous:
mixed with incorrect objects).
D
The C
ODE
32 evaluation option is acti-
vated for Code 39. The CLV490 is
attempting to interpret 6-digit C39 bar
codes as C32 bar codes (output as
9-digit decimal values).
The read 6-digit bar code is not a C32
bar code. The CLV490 outputs the defi-
ned error string instead.
–
Table 8-4: Meaning of the ST error status in the reading result
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