Allen-Bradley 1203-SSS, User Manual

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Glossary
B
BCC
Block Check Character. An error detection scheme where the 2’s
complement of the 8-bit sum (modulo-256 arithmetic sum) of all data
bytes in a transmission block. It provides a means of checking the
accuracy of each message transmission.
C
CRC
Cyclic redundancy check. An error detection scheme where all of the
characters in a message are treated as a string of bits representing a
binary number. This number is divided by a predetermined binary
number (a polynomial) and the remainder is appended to the message as
a CRC character. A similar operation occurs at the receiving end to prove
transmission integrity.
D
DF1 Protocol
A peer-to-peer link layer protocol that combines features of ANSI
X3.28-1976 specification subcategories D1 (data transparency) and F1
(two-way simultaneous transmission with embedded responses).
DriveExplorer
An easy-to-use software application designed for Microsoft
Windows 95, Windows 98, Windows NT (4.0 or greater), and Windows
CE (2.0 or greater) operating systems. This application is a tool for
monitoring and configuring Allen-Bradley products and adapters. A free
version of DriveExplorer Lite is included with the serial converter.
Information about DriveExplorer can be accessed at:
http://www.ab.com/drives/driveexplorer
DriveTools32
A software suite designed for Microsoft Windows 95, Windows 98, and
Windows NT (4.0 or greater) operating systems. This software suite
provides a family of tools that you can use to program, monitor, control,
troubleshoot, and maintain Allen Bradley products. Information about
DriveTools32 can be accessed at:
http://www.ab.com/drives/drivetools32
F
FLASH Update
The process of updating firmware in the converter.
Allen-Bradley