Operating Instructions
Chapter
8
CLV490 Bar Code Scanner
8009993/RA61/2007-07-20
©
SICK AG · Division Auto Ident · Germany · All rights reserved
8-3
Troubleshooting
8.3.2
LED error messages for the external parameter memory (connector cover)
The CLV490 also reports errors accessing the external parameter memory by means of the
"Device Ready" and "Read Result" LEDs.
LED behavior
Meaning
Possible cause
Remedy
1. When the device is
switched on, the "Device
Ready" LED blinks for
approx. 10 s and then
lights up constantly.
Start option: S
TART
WITH
E
XTER
-
NAL
P
ARAMETERS
.
The CLV490 has successfully
loaded the external parameter
set to its RAM.
–
Not applicable.
2. When the device is
switched on, the "Device
Ready" and "Read Re-
sult" LEDs blink for ap-
prox. 10 s.
The "Device Ready" LED
then lights up constantly.
Start option:
S
TART
WITH
E
XTER
-
NAL
P
ARAMETERS
.
The CLV490 has successfully
loaded the external parameter
set with tolerated errors
1)
to its
RAM.
Transfer ok, but different parame-
ter versions in the external mem-
ory and CLV490.
Upload parameter set to CLV-
Setup and check parameters
1)
.
3. The "Device Ready" LED
lights up constantly when
the device is switched on.
•
Start option: S
TART
WITH
E
X
-
TERNAL
P
ARAMETERS
.
The CLV490 has
not
loaded
external parameter set. In-
stead, it has loaded the inter-
nal parameter set to its RAM.
•
Start option: S
TART
WITH
INTER
-
NAL
P
ARAMETERS
.
The CLV490 has successfully
loaded the internal parame-
ter set to its RAM.
•
External parameter memory not
connected.
•
Start ok.
•
OK if the device is to be
operated without an external
parameter memory.
•
Check whether the external
parameter memory is connect-
ed correctly (free wiring: check
wire assignment).
•
None.
4. When the device is
switched on, the "Device
Ready" and "Read Re-
sult" LEDs blink conti-
nuously
2)
.
•
Start option: S
TART
WITH
E
X
-
TERNAL
P
ARAMETERS
.
The CLV490 has
not
loaded
the external parameter set.
Instead, it has loaded the in-
ternal parameter set to its
RAM.
The CLV490, however,
does not output data on the
host interface.
•
External parameter memory not
connected.
•
The parameter set in the exter-
nal memory is not from a
CLV490.
•
External parameter memory is
defective.
•
See
3 Remedy.
•
Use the correct external pa-
rameter memory or overwrite
the current one.
•
Repeat the startup procedure.
If the error is still present after
following
4 Remedy, 1st and
2nd paragraph
, contact the
SICK Service department.
1) The software of the parameter set in the CLV490 is older than that of the parameter set in the external memory: print out the parameter set using CLV-Setup. If necessary,
display the ID of the unknown/errored command group(s) using the <STX> 8?ERR <ETX> command in the Terminal Emulator window of CLV-Setup. Decode the ID using
the reference manual entitled "Command Language of the CLV490 Bar Code Scanners" and check the relevant parameter values in the tabs.
The software of the parameter set in the CLV490 is newer than that of the parameter set in the external memory: all of the new parameters in the CLV490 are set to the
default values. If these parameters are necessary, edit the values in the relevant tabs in CLV-Setup and download them to the CLV490 and the external memory.
2) Flashing stops when the device switches from Reading mode to Parameter mode (e. g. during download from CLV-Setup).
Table 8-2: LED error messages for access to the external parameter memory (connector cover)
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