Rockwell Automation 2098-IPD-020-DN Ultra5000 Series Intelligent Positioning Drives with DeviceNet Reference Manual - Manual (Page 27)

Publication 2098-RM002A-EN-P – October 2001
Programming Reference 4-3
The Defined Object Interface
The objects in the Ultra5000 Drive with DeviceNet have the interface
listed in the following table.
Object Addressing
The Media Access Control Identifier (MAC ID) is the common basis for
logically addressing separate physical components across DeviceNet.
The MAC ID is a unique integer assigned to each DeviceNet node that
distinguishes it specifically from among other nodes on the same
network. The MAC ID often is referred to as the node address. Each
component (object) is further identified with the following address
components:
Object Interface
Message Router Explicit Messaging Connection Instance
DeviceNet Message Router
Assembly I/O Connection or Message Router
Connection Message Router
Parameter Message Router
Component Description
Class ID The Class ID is a unique integer value assigned to each Object Class
accessible from the network. The Ultra5000 supports an 8-bit Class ID.
Instance ID The Instance ID is a unique identification assigned to an Object Instance
that identifies it among all Instances of the same Class.
It is also possible to address the Class itself by utilizing the Instance ID
value zero (0). The Ultra5000 supports an 16-bit Instance ID.
Attribute ID The Attribute ID is a unique identification assigned to a Class Attribute
and/or Instance Attribute.