Ring-Based Network Functions - Delta CMM-EIP02 Applications Manual

5.3 Ring-based Network Functions

DLR (Device Level Ring) is an EtherNet/IP protocol in a ring-based network. It provides single
network backup in a ring-bas network (only one physical layer network failure at a maximum is
allowed), and a means to detect, manage, and recover in a ring-based network.
A DLR network includes three types of ring nodes: Ring Supervisor, Ring Participants / Ring
Node, and DLR Switch. Dual-port option card only supports Ring Participants. You must enable
the Ring Supervisor function in a network before connecting a ring-based network, or network
failure may occur. See the table below for descriptions of each node.
Node
1. Manages a ring-based network and collects data, including
Ring
2. This function is normally disabled. You must enable this
Supervisor
3. Set priorities if there are multiple ring supervisors.
1. A basic function of DLR. In a DLR network, if you install a
Ring
Participants / 2. Reports fault network information to Ring Supervisor,
Ring Node
1. Via network socket, you can add ring-based network to non-
DLR Switch
2. DLR Switch is enabled with Ring Supervisor function.
Option Card Application Manual
status and error information. Every DLR must have at least
one ring supervisor.
function before connecting a ring-based network, or
network failure may occur.
device that does not support Ring Participant, it may cause the
device malfunctioned.
automatically adjusts communication methods when fault
occurs, and continues communicating on typology (linear bus)
after fault occurs.
ring based network, or add devices that do not support ring-
based network (including computer, SCADA) to ring-based
network.
Description
VFD EtherNet/IP Option Card
Delta's Models
AHCPU560-EN2
AHRTU-ETHN-5A
DVS-103I02C-DLR
AHCPU560-EN2
AHRTU-ETHN-5A
AH10EN-5A
DVS-103I02C-DLR
CMC-EIP02
CMM-EIP03
DVS-103I02C-DLR
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