Microscan MS-860, Руководство пользователя

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I/O Parameters
MS-860 Industrial Raster Reader User’s Manual
10-29
Symbol Position Separator
Raster/Scan Position by Symbology Type
Definition: Inserts a user-defined character between the decoded data and the sym-
bol position data.
Serial Cmd: < K758, raster status,scan position, separator >
Default: Space
Options: Any ASCII character.
Symbology Timing Raster position Scan position
Code 39
Code 128
I2of5
Codabar
Code 93
Pharma Code
RSS Limited
UPC
Position information
is from the first
decode of the sym-
bol.
Symbol position
from subsequent
decodes of the same
symbol is ignored.
Location of raster
when symbol was
decoded the first
time.
Location of symbol within the scan line of the
first decode.
UPC, supple-
mental
enabled, and
both main and
supplemental
symbols are
decoded
Position values may
come from different
scans and symbols:
Main symbol: First
decode.
Supplemental: The
scan in which both
the main and sup-
plemental are
decoded.
The most extreme
position (closest
to the top or bot-
tom of the raster
pattern) of either
the main or sup-
plemental.
The most extreme position (closest to the edge of
scan) from either the main or supplemental.
First bar and last bar position values may come
from different symbols and scans.
Note: At least one position value is from the first
decode of the main symbol. The other two values
may be from the supplemental. There is no indi-
cation as to which position value corresponds to
which symbol, but some assumptions can be
made if the symbols are moving in a ladder orien-
tation.
UPC, supple-
mental
required
When both symbols
decode in the same
scan line.
Location of the
raster when the
symbols were
decoded.
The most extreme position (closest to the edge
of scan) from either the main or supplemental.
First bar and last bar position come from differ-
ent symbols but the SAME scan.
PDF417
Position values are
averaged over sev-
eral scan lines in
which a codeword is
decoded.
The average ras-
ter position will
correspond to the
approximate
“middle” of the
symbol.
Average first and last bar position.
Note: If the symbol is moving “fast”, position
information may tend to “converge” toward the
middle of the raster pattern and scan line. First
and last bar positions will not correlate to row
width.
MicroPDF
RSS14
RSS Expanded
RSS Stacked
Position values are
for the last scan
which allows the
symbol to fully
decode.
The position of the
raster when the
symbol fully
decodes.
These symbologies can sometimes be decoded
even when the scan line does not cross all ele-
ments in one sweep. Therefore, the position
information corresponds to the position of the
last scanned element that allows the symbol to
fully decode.
This is a single point, and therefore, the scan
position data is the same for both the first and
last bar. Example: SP043:043.
Composite
Position values may
be mixed from either
the linear or 2D
component, and
may come from dif-
ferent scans.
The most extreme
position (closest
to the top or bot-
tom of the raster
pattern) of either
the linear compo-
nent or 2D com-
ponent.
The most extreme position (closest to the edge
of scan) from either the linear component or 2D
component. First bar and last bar position values
may come from different symbols and scans.
If both the linear and 2D component are both
single-point scan positions (example: RSS+
MicroPDF), then the net scan position will also be
a single point.
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