Rockwell Automation 20G PowerFlex 750-Series AC Drives - Manual (Page 343)

Rockwell Automation Publication 750-RM002B-EN-P - September 2013 343
Integrated Motion on the EtherNet/IP Network Applications for PowerFlex 755 AC Drives Chapter 6
• The network supports up to 50 mixed devices per line.
The primary disadvantage of a linear topology is that a connection loss or link
failure disconnects all downstream devices as well. To counter this disadvantage a
ring topology could be employed.
Ring Topology
A ring topology, or device-level ring (DLR), is implemented in a similar fashion
to linear topology. However, an extra connection is made from the last device on
the line to the first, closing the loop or ring. It is crucial to configure the Ring
Supervisor before connecting your linear topology into a ring topology.
Either a Dual Port EtherNet/IP Option Module or an Ethernet/IP network tap
(1783-ETAP) is required for this network topology (this diagram illustrates an
application using ETAPs). For more information about applying a Dual Port
EtherNet/IP Option Module, see the PowerFlex 20-750-ENETR Dual-Port
EtherNet/IP Option Module User Manual, publication
750COM-UM008 .
Although the ControlLogix is illustrated, the CompactLogix controller could
also be used.
PowerFlex 755 PowerFlex 755 PowerFlex 755 PowerFlex 755
1585J-M8CBJM-x
EtherNet (shielded) Cable
ControlLogix
1756-ENxTR
1783-ETAP 1783-ETAP 1783-ETAP 1783-ETAP 1783-ETAP
Point I/O
HMI