Rockwell Automation 2755 Enhanced Decoder Series B - Manual (Page 31)

Chapter
3
Publication 2755-833
Overview of Decoder
Operations
This chapter defines the function of the decoder and gives an
overview of decoder operations, including:
•
function of decoder
•
supported bar code symbologies
•
configuration options
•
stand-alone vs. host operations
•
types of memory
•
decoder operating modes
The decoder acquires and decodes video information from one or
two scanners. The decoder can then:
•
send the decoded data to a host device (host computer,
programmable logic controller), ASCII terminal, or LCD display
•
compare the decoded data to previously stored data and use the
results to operate up to eight discrete outputs (match code
operation)
The decoder also maintains counters for package count, no-reads,
and discrete output operations.
The decoder supports the following bar code symbologies:
•
Code 39 (standard character set)
•
Pharma–Code (available on DSzP and DDzP catalog numbers
only)
•
UPC-A and UPC-E including optional 2 or 5 digit supplements
•
EAN-8 and EAN-13 including optional 2 or 5 digit supplements
•
Code 128
•
Codabar
•
Interleaved 2-of-5
You can configure or monitor decoder operations using the built-in
configuration screens or by sending commands from a host device,
such as a PLC controller or computer. Both configuration options
allow you to:
•
select a bar code symbology for decoding operations
•
define operating parameters for the scanner(s)
•
set host message format for decoded bar code data
Chapter Objectives
Function of Decoder
Bar Code Symbologies
Configuration Options