Glossary, See the, E def – Rockwell Automation 20-COMM-Q ControlNet Adapter User Manual
Page 255
20-COMM-C/Q ControlNet Adapter User Manual
Publication 20COMM-UM003F-EN-P
Glossary
A
Adapter
Devices such as drives, controllers, and computers usually require a
network communication adapter to provide a communication interface
between them and a network such as ControlNet. An adapter reads data on
the network and transmits it to the connected device. It also reads data in the
device and transmits it to the network.
The 20-COMM-C (coax) or 20-COMM-Q (fiber) ControlNet adapter
connects PowerFlex 7-Class drives to a ControlNet network. Adapters are
sometimes also called ‘cards’, ‘embedded communication options’,
‘gateways’, ‘modules’, or ‘peripherals’.
B
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.
C
CAN (Controller Area Network)
CAN is a serial bus protocol on which DPI is based.
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 operating systems. You can obtain a free copy of
Connect Components Workbench software at
ControlFLASH
A free software tool used to electronically update 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.