Operating instructions
Chapter
8
ICR 84x Image Code Reader
Troubleshooting
8 010 961/0000/10-05-2005
©
SICK AG · Division Auto Ident · Germany · All rights reserved
8-11
Malfunction when reading 2-D codes (DataMatrix ECC 200)
See also
Chapter 10.4.1 “Improving the image quality“, Page 10-14
“Optimizing reading characteristics for special applications“, Page 10-20
.
Fault
Possible cause
Remedy
No Read:
The “Result“ LED
(default setting: “Good Read“) does not
light up at the end of the reading pulse.
– The “Result 2“ switching output (default
setting: “Good Read“) does not output a
pulse.
– The ICR outputs the status ST = 2 in the
reading result of the host interface (if ST
is enabled for output in the Reading data
on the D
ATA
S
TRINGS
tab; this is not
selected in the default setting).
– The ICR outputs the system message
“no code“ via the auxiliary interface
(Terminal Emulator of CLV Setup).
•
Read not successful, since there was no
code stationary in the illumination field
during the reading pulse
•
Parameterized resolution lower than
required
•
Parameterized number of multiple reads
not reached
•
Insufficient contrast between dark cells
and light background
•
Surface texture of the code causes
masking
•
For ink-jet printing: The individual points
of the code do not touch sufficiently
•
Finder pattern is visibly corrupted due to
print errors
•
Code consists of rectangular data fields
•
Code printed negatively (light on dark
background)
•
Perform the reading while the code is
stationary. Check the content of the
image memory with CLV Setup/
ImageFTP: trigger the ICR; is the code in
the image memory once the reading
cycle is complete?
•
In the CLV Setup program:
Select the R
EADING
C
ONFIGURATION
tab and
enter the correct value for “Minimum cell
size 2D“ in the R
EADING
PARAMETERS
2D
group. Download to the ICR.
•
Select the C
ODE
C
ONFIGURATION
tab, find
the 2-D S
YMBOLOGIES
group .Click the E
DIT
button, find the M
ULTIPLE
R
EADS
group.
selected value too large?
•
Select the R
EADING
C
ONFIGURATION
tab and
click the C
ODE
P
ROPERTIES
P
ARAMETERS
button. Improve the contrast with the
“Background“ slider.
Download to the ICR!
If there is no improvement:
Select the C
ODE
C
ONFIGURATION
tab and
click the 2D-S
YMBOLOGIES
P
ARAMETERS
button. Click the O
PTIMIZATION
P
ARAMETERS
button. Enter the value 10 in the
“Decoder retry on weak contrast for xx
cells“ input field.
Download to the ICR!
Increase the value if necessary.
•
Reduce masking with the “Surface“
slider.
Download to the ICR!
•
Compensate for the insufficiently small
dots with the “Deviation of dot size“
slider. Download to the ICR.
•
Select the C
ODE
C
ONFIGURATION
tab and
click the E
DIT
button in the 2D-
S
YMBOLOGIES
group. Click the O
PTIMISATION
P
ARAMETERS
button. Click the “Tolerate
finder errors“ checkbox.
Download to the ICR.
•
Select the C
ODE
C
ONFIGURATION
tab and
click the E
DIT
button in the 2D-
S
YMBOLOGIES
group. In the D
ATA
F
IELDS
group, click the “Allow rectangular data
fields“ option.
Download to the ICR.
•
In the CLV Setup program:
Select the C
ODE
C
ONFIGURATION
tab and
click the E
DIT
button in the 2D-
S
YMBOLOGIES
group. Select the “Black“
option in the B
ACKGROUND
group.
Download to the ICR!
Table 8-6: Troubleshooting: Result-status output errors in Reading mode (reading 2-D codes)
