Smart Raster - Allen-Bradley 2-D User Manual

Scanner Features 1–5

Smart Raster

The scanner has a programmable smart raster capability, which
causes the scanner to emit a raster pattern dynamically adjusted to
the height of a 2-D (PDF417) bar code. To increase scanning
efficiency and decrease decode time, the scanner determines the
height of the bar code and then opens the scan pattern to a size
optimal for decoding the bar code.
In normal smart raster operation, a trigger pull causes a slab raster
pattern to appear. If the target is a 1-D bar code, the pattern never
opens beyond a slab raster.
If the target bar code is a 2-D (PDF417) bar code, the scanning
pattern opens to a full, optimized raster pattern when the scanner is
poperly aligned over the bar code.
The scanner operates with a smart raster capability unless
programmed otherwise.
Aiming Dot Pattern
Slab Raster Pattern
Open Raster Pattern
Publication 2755-6.4