SICK CLV 480 - Malfunctions in Reading mode: result output errors

Chapter 8 Operating Instructions
CLV 480 Bar Code Scanner
8-14 © SICK AG · Division Auto Ident · Germany · All rights reserved 8 010 080/O824/10-02-2005
Troubleshooting
8.5.3 Malfunctions in Reading mode: result output errors
¾ Check whether the "Device Ready" LED lights up.
If the LED does not light, see Table 8-5, Page 8-9.
CLV in stand-alone configuration
Here: number of bar codes to be read = 1
Malfunction Possible cause Remedy
1. The "Read 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) is not
outputting a pulse
– The CLV outputs status ST=2 in the
reading result on the host interface
(outputting of ST disabled by default)
– The CLV outputs the message "no
code" in the reading result of the
terminal interface
• Read not successful, since there was no
bar code in the reading field during the
reading pulse
• Scan line positioned incorrectly
• Bar code presented at incorrect reading
distance
• The presented bar code’s module width
cannot be read by the CLV type being
used
• Evaluation range of the scan line is
limited unfavourable (CP values)
• Wrong focus position in Distance
Configuration choosen.
• CLV does not switch over focus position:
Trigger source parameterized incorrectly.
• Synchronize read with presence of an
object in reading field. See Chapter 8.5.2
Malfunctions in Reading mode: reading
trigger errors, Page 8-10
• Align CLV. Is bar code at center of scan
line? Check the reading quality with the
"CLV-Setup" software. Choose PERCEN-
TAGE EVALUATION. See Chapter 6.5.2 Per-
centage evaluation, Page 6-28
• Check whether reading distance of bar
code is in the specified reading range?
• Present a bar code with an acceptable
module width. See
Chapter 9 Technical
data, Page 9-1
• In the "CLV-Setup" program: choose the
READING CONFIGURATION tab, click the
DISTANCE CONFIGURATION button. Are the
min. and max. code position values cor-
rect? Check with SHOW CP-LIMITS. See
Chapter 6.5.4 Show CP-limits,
Page 6-30
• In the "CLV-Setup" program: Select the
READING CONFIGURATION tab, click the DI-
STANCE CONFIGURATION button. Does the
focus position match the distance of the
object?
• In the "CLV-Setup" program: choose the
READING CONFIGURATION tab, in the
FOCUS CONTROL section:
a) Trigger source "Switching input":
Check functional assignment of IN 3 and
IN 4 and connection of the sensors. See
Fig. 5-5, Page 5-18
b) Trigger source: "Serial interface":
Check the data connection to the host.
Use the "CLV-Setup" program to check
the host command strings: choose
AUXI-
LIARY INTERFACE tab. Choose MONITOR
H
OST INTERFACE function. See
Chapter 6.5.8 Monitor Host Interface,
Page 6-37.
Download temporarily to CLV!
c)Trigger source: Timer:
Check switchover time
d) line scanner with oscillating mirror:
Optional "Oscillating Mirror Extrema“ se-
lected?
Table 8-8: Troubleshooting: result output errors in Reading mode (CLV in stand-alone configuration)