36 Rockwell Automation Publication 1791ES-UM001G-EN-P - November 2016
Chapter 2 About the Modules
A DLR network includes the following nodes.
Node Description
Supervisor node A DLR network requires at least one node to be configured as ring supervisor.
IMPORTANT: By default, the supervisor function is disabled on supervisor-capable devices, so they are ready to
participate in a linear/star network or as a ring node on a DLR network.
In a DLR network, you must configure at least one of the supervisor-capable devices as the ring supervisor before
physically connecting the ring. If you do not, the DLR network does not work.
The ring supervisor provides these main functions:
• Manages traffic on the DLR network
• Collects diagnostic information for the network
We recommend that you do the following:
• Configure at least one back-up supervisor.
• Configure the desired active ring supervisor with a numerically higher precedence value as compared to the back-up
supervisors.
• Track the supervisor-precedence values for all supervisor-enabled nodes in the DLR network.
Ring node A ring node is any node that operates on the network to process data that is transmitted over the network. A ring node
can also pass on the data to the next node on the network. When a fault occurs on the DLR network, the ring nodes
reconfigure themselves and relearn the network topology. Additionally, ring nodes can report fault locations to the active
ring supervisor.
To Next Page
Loading...
