Rockwell Automation 2755 2D Hand-Held Scanner - Manual (Page 42)

3–4 Operating the Scanner
Publication 2755-6.4
When the scanner has decoded a symbol successfully:
•
laser turns off
•
green LED lights
•
short, high-tone beep occurs
4. Decoded data is transmitted to the host device using the
communication parameters described in Chapter 5.
Scan the Entire Bar Code Symbol
•
The larger the symbol, the farther away you should hold the
scanner to permit the raster pattern to cover the symbol (but not
more than 8 inches).
•
Hold the scanner close for denser symbols (but not less than 2
inches).
•
In all cases, make sure the scan pattern extends at least three
quarters of an inch beyond each edge of the bar code.
•
The PDF417 bar code symbol has multiple rows, but the raster
pattern also has multiple scanning rows. Do three basic things
when scanning:
– Center the aiming pattern on the bar code.
– Keep the pattern in the same horizontal plane as the bar code.
Orienting Scan Pattern on PDF417 Bar Code
3/4” 3/4”