Glossary – Rockwell Automation 20-750-DNET PowerFlex DeviceNet Option Module User Manual
Page 133
Rockwell Automation Publication 750COM-UM002B-EN-P - October 2012
133
Glossary
The following terms and abbreviations are used throughout this manual.
For definitions of terms not listed here, see the Allen-Bradley Industrial
Automation Glossary, publication
.
ADR (Automatic Device
Replacement)
A means for replacing a malfunctioning device with a new unit, and having the
device configuration data set automatically. The DeviceNet scanner is set up for
ADR using RSNetWorx for DeviceNet software. The scanner uploads and stores
a device’s configuration. Upon replacing a malfunctioning device with a new unit
(node 63), the scanner automatically downloads the configuration data and sets
the node address.
Bridge
A network device that can route messages from one network to another. A bridge
also refers to a communication module in a ControlLogix controller that
connects the controller to a network. See also scanner.
Bus Off
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 on the network. This condition is often caused by
corruption of the network data signals due to noise or data rate mismatch.
CAN (Controller Area Network)
CAN is a serial bus protocol on which DPI is based.
Change of State (COS) I/O Data
Exchange
A device that is configured for Change of State I/O data exchange transmits data
at a specified interval if its data remains unchanged. If its data changes, the device
immediately transmits the change. This type of exchange can reduce network
traffic and save resources since unchanged data does not need to be transmitted
or processed.
CIP (Common Industrial Protocol)
CIP is the transport and application layer protocol used for messaging over
EtherNet/IP, ControlNet, and DeviceNet networks. The protocol is used for
implicit messaging (real-time I/O) and explicit messaging (configuration, data
collection, and diagnostics).
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 software at
Class
A class is defined by the DeviceNet specification as ‘a set of objects that all
represent the same kind of system component. A class is a generalization of an
object. All objects in a class are identical in form and behavior, but may contain
different attribute values.’
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.