Rockwell Automation 22-COMM-D DeviceNet Adapter - Manual (Page 130)

Glossary-6
N
Node Address
A DeviceNet network can have as many as 64 devices connected to it.
Each device on the network must have a unique node address between 0
and 63. Node address 63 is the default used by uncommissioned devices.
Node addresses are sometimes called “MAC IDs.”
NVS (Non-Volatile Storage)
NVS is the permanent memory of a device. Devices such as the adapter
and drive store parameters and other information in NVS so that they are
not lost when the device loses power. NVS is sometimes called
“EEPROM.”
O
Objects
The DeviceNet specification defines an object as “an abstract
representation of a particular component within a product.”
P PCCC (Programmable Controller Communications Command)
PCCC is the protocol used by some controllers to communicate with
devices on a network. Some software products (for example,
DriveExplorer and DriveTools 2000) also use PCCC to communicate.
Polled I/O Data Exchange
A device that is configured for polling I/O data exchange sends data
immediately after it receives a request for the data. For example, an
adapter receives a Logic Status Command from the scanner and then
sends the Logic Status of the connected PowerFlex drive.
PowerFlex 4-Class Drives
The Allen-Bradley PowerFlex 4-Class family of drives include the
PowerFlex 4 and PowerFlex 40. These drives can be used for
applications ranging from 0.2 kW (0.25 HP) to 7.5 kW (10 HP). All
PowerFlex 4-Class drives implement DSI, allowing those that support an
internal adapter to use the 22-COMM-D DeviceNet adapter. The adapter
can be installed in a PowerFlex 40 drive but not in the PowerFlex 4. This
manual focuses on using the adapter with a PowerFlex 40 drive.