Architecture Block Diagram; Anticipated Read Failure Rate - Pitney Bowes FastPac DI900 Manuallines

4 • Scan Code Specifications
DI900/DI950
Scanning
Architecture
Raw Signal
Raw Signal
Barcode
Scanner
Decoder
Fixe d
Be am
Scanne
r
90.0
89 mm
Fixe d
Be am
Scanne
r
4-20

Architecture Block Diagram

The scan head and decoding are physically and logically isolated from the ap-
plication software. A separate interface board accepts both raw fixed beam
signals and serial data from scanners with embedded decoding. The interface
board handles code integrity locally, and passes back either a valid read trans-
lated into a standard functional protocol, or an error code representing the
problem with the read (see figure below).
Decoded String
Control Document
DI900/DI950 Scanning System Architecture

Anticipated Read Failure Rate

A read failure is defined as a decode of the read that does not match the ac-
tual intended code. The design goal is a failure rate of better than 1 in 5000
items. When parity is used, the failure rate shall not exceed 1 in 1,000,000
A read rate of better than 99.999% is required on a good quality print where
the code includes all integrity features.
Only one protocol w ill be used
by an installation
Motion Control System
FB Raw Signal Decoder
OMR
BCD Decoder
Decoder
Decode Box
33 M Hz
Encoder
October 23, 20
USB
Function Protocol
Timing Signal
The system needs to be able to
handle one or tw o scanners
w here the second w ill alw ays be
a fixed beam head.
Up to 6 different setups need to
be dow nloaded and handled by
a single boar d.
Raw Sensor Output
Optional
USB
RS232
SV61314 Rev. A