Rockwell Automation Ethernet Design Considerations Reference Manual - Manual (Page 53)

Rockwell Automation Publication ENET-RM002C-EN-P - May 2013 53
Ethernet Infrastructure Features Chapter 3
A DLR network is a single-fault tolerant network. Network traffic is managed to
make sure critical data is delivered in a timely manner.
Physical layer failure includes the following:
• All faults that are detectable at physical layer
• Physical layer failure detected by protocol-aware node
• Status message sent by ring node and received by ring supervisor
Stratix 8000
IE Switch
Beacon Beacon
Forwarding
ControlLogix Controller
Active Ring
Supervisor
Announce Announce Blocking
ETAP
POINT I/O
Distributed I/O ArmorPOINT I/O
Distributed I/O POINT I/O
Distributed I/O ArmorPOINT I/O
Distributed I/O
Stratix 8000
IE Switch
ETAP
ControlLogix Controller
Active Ring
Supervisor
Link Failure
Link Status Link Status
POINT I/O
Disrtributed I/O ArmorPOINT I/O
Distributed I/O POINT I/O
Disrtributed I/O ArmorPOINT I/O
Distributed I/O