Glossary – Rockwell Automation 1203-USB Converter User Manual
Page 101
PowerFlex 1203-USB Converter User Manual
Publication DRIVES-UM001D-EN-P
Glossary
A
Application Code
Code that runs in the converter after the boot code calls it. Application code
performs the normal operations of the converter.
B
BCC (Block Check Character)
An error detection scheme using 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.
Boot Code
Code that runs when the converter first receives power. Boot code checks
basic operations and then calls the application code.
Bus Off
This term is applicable to only products that implement DPI or SCANport.
A bus off condition occurs when an abnormal rate of errors is detected on
the Control Area Network (CAN) bus in a device. The bus-off device cannot
receive or transmit messages. This condition is often caused by corruption
of the network data signals due to noise or data rate mismatch.
C
Connected Components Workbench Software
The recommended tool for monitoring and configuring Allen-Bradley
products and network communication adapters. It can be used on computers
running various Microsoft Windows operating systems. You can obtain a
free copy of Connected Components Workbench softwa
.
ControlFLASH
A free software tool used to electronically update the firmware of
Allen-Bradley products and network communication adapters.
ControlFLASH software is downloaded automatically when the firmware
revision file for the product being updated is downloaded from the
Allen-Bradley updates website to your computer.
Converter
The 1203-USB converter provides an electronic communications interface
between any Allen-Bradley product implementing DPI, DSI, or SCANport
and a computer with a USB port. This converter uses a full-duplex RS-232
DF1 protocol. The converter may also be referred to as ‘1203-USB’ or
‘peripheral’.
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.