Rockwell-automation 842E EtherNet/IP Absolute Encoder User Manual Manuale Utente Scaricare il pdf (Pagina 19)

Rockwell Automation Publication 842E-UM001A-EN-P May 2012 11

EtherNet/IP overview Chapter 3

Linear topology

The linear topology uses the embedded switching capability to form a daisy-

chain style network that has a beginning and an end. Linear topology simplifies

installation and reduces wiring and installation costs, but a break in the network

disconnects all devices downstream from the break. When this topology is used,

both ethernet connections on the encoder may be used. For the network

connection use Link 1, Link 2, or both.

Device level ring topology

A DLR network is a single-fault-tolerant ring network intended for the

interconnection of automation devices. DLR topology is advantageous as it can

tolerate a a break in the network. If a break is detected, the signals are sent out in

both directions. With this topology, use both the Link 1 and Link 2 ethernet

connections on the 842E encoder.

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Rockwell-automation 842E EtherNet/IP Absolute Encoder User Manual Manuale Utente Pagina 19