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Network Communication
Chapter 2
EtherNet/IP Network Features
When used with the CompactLogix packaged controller, the
EtherNet/IP communication network provides these features:
• Supports messaging, produced/consumed tags, HMI, and
distributed I/O
• Encapsulation of messages within standard TCP/UDP/IP
protocol
• Use of a shared application layer with the DeviceNet network
• Easily interfaces via RJ45, category 5, unshielded, twisted-pair
cable
• Supports half/full-duplex 10 Mbps or 100 Mbps operation
• Supports the use of standard switches
• Does not require network scheduling
• Does not require the use of routing tables
To view an example of an EtherNet/IP network that includes an
1769-L23E packaged controller, see the network configurations shown
in the section Configurations for Quick Start on page 4.
About EtherNet/IP Network Connections
You indirectly determine the number of connections the controller
uses by configuring the controller to communicate with other devices
in the system. Connections are allocations of resources that provide
more reliable communication between devices than unconnected
messages.
A connection is a point-to-point communication mechanism used to
transfer data between a transmitter and a receiver. An EtherNet/IP CIP
connection transfers data from an application running on one
end-node to an application running on another end-node. A CIP
connection is established over a TCP connection. A single TCP
connection can support multiple CIP connections.
For more information about CIP and TCP connections, see the
Ethernet Performance Application Solution, publication ENET-AP001.
Packaged Controllers, EtherNet/IP Connections, and RPI
The built-in EtherNet/IP port of the packaged controller supports 32
CIP connections over an EtherNet/IP network. With these controllers,
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