LINE SCANNER
A single beam line scanner is used when the bar codes are being presented to the scanner in the “ladder” orientation (shown in
Figure 1-2 A). The scanning direction is perpendicular to the conveyed direction and the entire bar code is presented to the scan-
ner. The usable length of the scan line, or “scan width,” is dependent on the scanning distance.
RASTER SCANNER
If the bar codes pass the scanner in a “picket fence” orientation, a raster scanner is
recommended to ensure complete scanning coverage of the bar code. See Figure
1-2 B. Refer to adjacent table to determine raster pattern height according to read-
ing distance.
PROGRAMMING
The CLV is programmed at the factory with default settings for each parameter. The
default settings are considered temporary, for use at start-up or for testing the
system. In order to achieve optimal operation, the user can directly modify default
parameters for the intended application. Programming, or parameterization, can be
performed by using one of the following:
• Windows-based CLV Utility Software (included) via host port
• Host Command Language Strings via host port
The CLV 410/412 have a single interface port called the host interface. The table below shows the default parameters of the host
interface:
Parameters
Setting
Type
RS 232
Data transmission rate
9600 Baud
Parity; data bits
None; 8 data bits
Stop bit
1
Protocol
None
These communication default parameters are set temporarily for 5 seconds after power up to allow a user to program the CLV if
permanent settings are forgotten.
STORAGE OF PARAMETERS
The CLV stores all parameter values either temporarily in the working memory (RAM), where it remains until the system is turned
off, or permanently (non-volatile memory) in the EEPROM. The CLV Utility Software also stores the parameter values in a file that
can be saved on a disk.
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I n t r o d u c t i o n
Reading Distance
100 mm (4 in)
200 mm (8 in)
300 mm (12 in)
400 mm (16 in)
Raster Height
8 mm (.3 in)
13 mm (.57 in)
18 mm (.70 in)
24 mm (.95 in)