Rockwell Automation PLC-5 Fieldbus Solutions for Integrated Architecture User Manual - Manual (Page 50)

Publication 1757-UM006A-EN-P - May 2002
2-6 Integrating Fieldbus into Rockwell Automation Logix System
Network Management description
Network Management provides the following capabilities for
managing the communication system of a fieldbus device.
• Loading a Virtual Communication Relationship (VCR) list or
single entries in this list; (A VCR represents a communication
channel through the complete communication stack.)
• Configuring the communication stack;
• Loading the Link Active Schedule (LAS);
• Monitoring performance; and
• Monitoring fault detection.
The collection of managed variables is called the Network
Management Information Base (NMIB).
System Management Description
System Management provides the following functions to coordinate
the operation of various devices in a distributed fieldbus system.
• Assigning node addresses for devices;
• Synchronizing the application clock;
• Distributing application scheduling across the link; and
• Providing support for locating application tags.
It provides the needed facilities for bringing new devices on the link
to an operational state and for controlling the overall system
operation. Information, which is used to control system management
operation, is organized as objects stored in the System Management
Information Base (SMIB).