PowerFlex® 755 Drive Embedded EtherNet/IP Adapter User Manual
Publication 750COM-UM001A-EN-P
Chapter
2
Installing the Adapter
Since the EtherNet/IP adapter is embedded on the Main Control Board
in the PowerFlex 755 drive, the only required adapter installation is
setting its IP address and connecting it to the network.
Preparing for an Installation
Before installing the embedded EtherNet/IP adapter:
•
Read the EtherNet/IP Performance and Application Guide
(publication ENET-AP001) and EtherNet/IP Media Planning and
Installation Manual (publication ENET-IN001).
•
Understand IGMP Snooping/Ethernet Switches
Much of EtherNet/IP implicit (I/O) messaging uses IP multicast
(including this embedded EtherNet/IP adapter) to distribute I/O
control data, which is consistent with the CIP producer/consumer
model. Historically, most switches have treated multicast packets the
same as broadcast packets. That is, all multicast packets are
re-transmitted to all ports.
IGMP snooping constrains the flooding of multicast traffic by
dynamically configuring switch ports so that multicast traffic is
forwarded only to ports associated with a particular IP multicast group.
Switches that support IGMP snooping “learn” which ports have
devices that are part of a particular multicast group and only forward
the multicast packets to the ports that are part of the multicast group.
Be careful as to what level of support a switch has of IGMP snooping.
Some layer 2 switches that support IGMP snooping require a router
(which could be a layer 3 switch) to send out IGMP polls to learn
what devices are part of the multicast group. Some layer 2 switches
can use IGMP snooping without a router sending polls. If your
control system is a stand-alone network or is required to continue
performing if the router is out of service, make sure the switch you
are using supports IGMP snooping without a router being present.
•
Verify that you have all required equipment. Refer to
.
Topic
Page
Setting the IP Address Switches
