Chapter
11
Operating Instructions
CLV640 Bar Code Scanner
122
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SICK AG · Division Auto Ident · Germany · All rights reserved
8011975/0000/2008-04-14
Appendix
11.7
Glossary
Also see the SOPAS-ET configuration software online help for further terms.
Aperture angle
α
Aperture within the boundaries of which the bar code scanner is able to detect codes
(through the lenses). A V-shaped area appears radially in front of the reading window, at
right angles to the conveyor system (reading from above), in which the codes to be read
must be positioned.
Aspect ratio
For bar codes with the code height (strip length) to code length (number of characters) ratio.
Aux interface
Logical auxiliary data interface of the bar code scanner with a fixed data output format,
physically switched to RS-232 (Aux) and Ethernet (port 2111). With this data interface, ac-
cess to the bar code scanner for the configuration is always possible with the PC and the
SOPASET configuration software. The data interface is also used for diagnosis (output of
reading diagnosis data or monitoring the data traffic on the Host interface). For the physical
RS-232 interface, the following applies: fixed data format, data transfer rate 57.6 kbd. The
data output to the PC via RS-232 can be switched off, existing Aux interface communication
via the Ethernet interface (port 2111) remains active.
Bar code
Field of dark strips (bars) and light spaces (elements) arranged in parallel, which, by working
to a certain rule (specification), can be represented on the medium (subsurface) by various
print processes. A user-readable (alpha)numeric character is produced from each machin-
ereadable, corresponding number and combination of strips and spaces. Since the entire
coded information, framed by start and stop characters, is available as a whole in one di-
mension and is also usually analysed by line, bar codes are also referred to as linear codes.
The various code types differ in their codeable character inventory, design (number of ele-
ments per character, number of characters, start/stop characters, check characters), their
information density and in their print tolerances. The length of the code strips and spaces
has no bearing on the information content. However, longer code strips and spaces can be
more easily analysed by the reading device.
CAN interface
Physical data interface. Controls construction of a rapid SICK-specific CAN SENSOR network
with various functions (e.g. multiplexer, master/slave). Access to the CLV640 Bar Code
Scanner for configuration is possible via the CAN interface (network) using the SOPAS-ET
configuration software in remote mode.
Code geometry
Code length and height dimensions.
