Rockwell Automation RECOMM-DNET DeviceNet Adapter for use with DPI AC Drives - Manual (Page 157)

Glossary Glossary-1
G
LOSSARY
adapter - Devices such as drives, controllers, and computers
usually require an 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 RECOMM-DNET DeviceNet adapter is an adapter that
connects SP600 drives to a DeviceNet network. Adapters are
sometimes also called “modules,” “cards,” “embedded
communication options,” “gateways,” and “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. 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.
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.
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.
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.”
Control and Information Protocol (CIP) - CIP is the transport and
application layer protocol used for messaging over DeviceNet. The
Control protocol is for implicit messaging (real time I/O). The
Information protocol is for explicit messaging (configuration, data
collection, and diagnostics).