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Downlink DLR Network
DLR ETAP Connection to 900 I/O and EIP Devices
As an alternative to an HSR ring network with only ControlEdge 900
I/O, UOC can optionally be connected to an EtherNet/IP-based I/O,
device and PLC ring network through its ETH3 downlink port. Under
that configuration a UOC can communicate simultaneously with
ControlEdge 900 I/O and third party devices attached to the same
EtherNet/IP network.
One supported EtherNet/IP network topology is that of a DLR ring
which provides redundancy protection against a single network ring
fault. Installation and maintenance of a downlink EtherNet/IP network
must be done in accordance with the best practices of Ethernet
networking in general and EtherNet/IP in particular. In Experion
R510, UOCs will be directly connected to DLR network, and EPMs
must be connected to a DLR ring using redundancy boxes called
ETAPs (EtherNet/IP Taps). This requirement will be removed in a
future release.
In this topology, UOC connects directly to the ring through downlink
ports ETH3 and ETH4. EPMs connect through their ETH1 port with
ETH2 port disconnected
An example is shown in the diagram below.
DLR ETAP Connection to 900 I/O and EIP Devices
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