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
8-3
Troubleshooting
"Host – Receive fault"
The host has requested the
data output string last sent by
the CLV three times; NAK has
been issued with each attempt.
•
Host receive set incorrectly
•
Data transmission interrupted
e. g. by cable break
•
Check the host
•
Check connecting cable and
monitor data transfer of the
host interface. To do so, select
upload from the CLV by using
the "CLV-Setup" progam,
select the A
UXILIARY
I
NTERFACE
tab and select M
ONITOR
H
OST
I
NTERFACE
in the drop down list.
Download to the CLV!
Start the Terminal Emulator.
"Host - transfer to slow"
In the CLV, data is available for
output faster than it is trans-
mitted to the host.
•
Baud rate too low
•
Incorrect protocol type selected
•
Protocol timeout too long for
the reading pulse frequency
Check the configuration of
the host interface.
"Host - transmit fault"
The CLV cannot correctly
receive the data sent by the
host.
•
Host interface of the CLV con-
figured incorrectly
•
Data transmission interrupted
e. g. by cable break
•
Check the CLV and host.
•
Check connecting cable and
monitor data transmission at
the host interface. To do so,
upload from the CLV using the
"CLV-Setup" program, choose
the A
UXILIARY
I
NTERFACE
tab and
select M
ONITOR
H
OST
I
NTERFACE
from the drop-down list.
Download to the CLV!
Start the Terminal Emulator.
"Master/slave - trigger too
soon"
The new reading pulse for the
master is received before its
timeout has elapsed.
Timeout for the master is too long Check the coordination between
reading pulse and timeout. To do
so, upload from the CLV using the
"CLV-Setup" program, choose the
D
EVICE
C
ONFIGURATION
tab and
change the M
ASTER
T
IMEOUT
in the
S
CANNER
A
RRANGEMENT
section.
Download the changes to the
CLV!
"No polls?"
Network operation: the CLV is
waiting for polls by the CLX 200
network controller.
•
Data connecting cable inter-
rupted
•
CLX 200 not ready
•
Incorrect device number pa-
rameterized
•
Inadvertently parameterized for
network operation
•
Check cables.
•
Switch on CLX 200
•
Device number: 01 to 31
•
Check the configuration of the
host interface.
To do so, upload from the CLV
using the "CLV-Setup" pro-
gram, choose the H
OST
I
NTER
-
FACE
tab and check the settings
in the I
NTERFACE
P
ROTOCOL
sec-
tion.
Download the changes to the
CLV!
"Oscillating mirror faulty"
The CLV cannot operate the
oscillating mirror or cannot ini-
tialize the mirror.
Device fault.
Contact the SICK Service depart-
ment.
Message
Meaning
Possible cause
Remedy
Table 8-1: Error messages output on the terminal interface
