Operating Instructions
Chapter
8
CLV 490 Bar Code Scanner
8 008 796/0000/25-06-2002
©
SICK AG · Division Auto Ident · Germany · All rights reserved
8-13
Troubleshooting
1. The "Read Result" LED default setting:
Good Read) does not light up at the end
of the reading pulse:
– continued –
•
The reading angles at which the bar code
appears to the CLV are too large
•
In the "CLV-Setup" program: choose the
C
ODE
C
ONFIGURATION
tab, D
ECODER
sec-
tion: choose Standard decoder. Down-
load temporarily to CLV!
Start P
ERCENTAGE
E
VALUATION
, choose
DISTANCE
CONFIGURATION
. Monitor read-
ing quality (reading quality > 70 %!). If
necessary, realign CLV and/or reconfig-
ure distance config-
uration. If ok, choose
SMART
DECODER
.
Download to CLV.
•
Bar code in total reflection zone
•
Evaluation criteria for bar code incorrect
•
Bar code quality inadequate
•
Optimize CLV alignment (scan line should
strike the bar code at a skew of approx.
15
°
) Use the "CLV-Setup" program to
check the quality of the read. Start P
ER
-
CENTAGE
E
VALUATION
. See
Percentage evaluation, Page 6-22
•
In "CLV-Setup" program: choose the
R
EADING
C
ONFIGURATION
tab, C
ODES
section. Enable all code types (except
Pharmacode), set code lengths to F
REE
.
Download temporarily to CLV!
Start P
ERCENTAGE
E
VALUATION
. Code type
and length are displayed in the reading
result. Enable recorded code type in the
C
ODES
section and disable all other
types. Enter the code length under F
IXED
on the code type tab. Download to CLV!
•
Check: sufficient blank zones present?
Print contrast adequate? Specified print
tolerances exceeded?
In the "CLV-Setup" program: choose R
EA
-
DING
C
ONFIGURATION
tab, S
EGMENTATION
section. Is
S
TART
/S
TOP
selected? Per-
form read with reference code.
2. The CLV is not transferring any reading
results to the host
•
Reading pulse is not functioning correctly
•
Wiring fault in data connection
•
Voltage level incorrect
•
Host interface in CLV parameterized
incorrectly
•
See
Chapter 8.5.2 Malfunctions in Read-
ing mode: reading trigger errors,
Page 8-11
•
Check wiring as shown in
•
Measure voltages
•
In "CLV-Setup" program: choose H
OST
I
NTERFACE
tab, D
ATA
F
ORMAT
section. Are
the interface type (hardware) and data
format correct? Check settings in I
NTER
-
FACE
P
ROTOCOL
section.
3. The CLV transfers the status ST=3 to the
host in the reading result
The CLV has diagnosed a device error in the
selftest
Switch the CLV off and on again. Does the
"Device Ready" LED light up? If not, contact
the SICK Service department.
Malfunction
Possible cause
Remedy
Table 8-7: Troubleshooting: result output errors in Reading mode