Rockwell Automation 20-COMM-D DeviceNet Adapter Series B FRN 2.xxx - Manual (Page 231)

20-COMM-D DeviceNet Adapter User Manual
Publication 20COMM-UM002G-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 DeviceNet. 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-D DeviceNet adapter connects PowerFlex 7-Class drives to
a DeviceNet network. Adapters are sometimes also called ‘cards’,
‘embedded communication options’, ‘gateways’, ‘modules’, or
‘peripherals’.
Automatic Device Replacement (ADR)
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.
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.
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).