SICK CLV 421

Chapter 8 Operating Instructions
CLV 42x bar code scanner
8-4 © SICK AG · Division Auto Ident · Germany · All rights reserved 8 009 981/O078/16-08-2004
Troubleshooting
8.4 Error status ST in read result of a bar code
Value Meaning Possible cause Remedy
0 "Good read" – not applicable
1 Incorrect check digit The check digit calculated by the CLV
during the reading process does not
match that printed in the bar code.
Check whether the check digits in the
bar code which were generated by
the print process are correct.
2 No bar code of the enabled code type
found according to the evaluation
criteria
• No bar code in the CLV's reading range
during the reading pulse
• Code type/length in the CLV not
enabled for decoding
• Reading window obstructed/dirty
• Synchronize the pulse of the CLV
with the entry of a bar code into the
reading area.
• Correct the code configuration
parameters.
• Check the reading window.
3 Device fault Device fault Call up the self-test! See
Chapter 6.5.9 Self-test, Page 6-23.
If result ≠ 000: Contact the SICK
Service department.
5 Required number of successful
multiple reads for the bar code not
reached
• Conveyor speed of the object is too
high
• Scanning frequency is too low
• Ladder-type arrangement for bar code
relative to the conveyor direction: code
height (bar length) too poor
• Print quality too poor
• Check the conveyor speed.
• Adjust the scanning frequency.
• Check the code height.
• Check the print quality.
6 Master:
Number of slave reading results does
not match the parameterized number
of slaves
• The parameterized number of slaves
does not match the actual number of
slaves available.
• Timeout for the master is selected too
short.
• Data connection between slaves and/
or the master has been interrupted.
• Check the entered number of
slaves.
• Check the master timeout setting.
• Check the cables between the
slaves and the master.
7 The source of the reading result is the
auxiliary input via the terminal
interface
The bar code was not detected by the
reading function of the CLV, but was
entered subsequently with the auxiliary
function of the terminal interface and sent
to the host in a separate data string.
not applicable
9 The OUTPUT FILTER function is also
activated for the code comparison.
The CLV has detected valid bar codes.
However, these do not match the
active match code(s)
The scanned object does not have a bar
code that matches the specified match
code.
not applicable
A The CHECK MAX. NUMBER OF CODES
function is active.
The number of valid bar codes
detected by the CLV in reading mode
exceeds that specified under NUMBER
OF CODES: MAXIMUM.
It repeatedly outputs the defined error
string until the number specified under
NUMBER OF CODES: MINIMUM is reached.
One object in a set of objects with a
constant number of bar codes, for
example, contains more bar codes than
defined in the application.
This message is used to indicate
errors on the objects (e.g. check
whether objects are homogeneous:
mix with incorrect objects).
D The "Code 32" evaluation option is
activated for Code 39.
The CLV is attempting to interpret
6-digit C39 bar codes as C32 bar
codes (output as 9-digit decimal
values).
The read 6-digit bar code is not a C32 bar
code. The CLV outputs the defined error
string instead.
not applicable
Table 8-2: Meaning of the ST error status in the reading result