Rockwell Automation 1769-L23E-QB1B_L23E-QBFC1B_L23-QBFC1B CompactLogix Packaged Controllers Quick Start and User Manual - Manual (Page 159)

Publication IASIMP-QS010B-EN-P - October 2009 159
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 6 .
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, the number
of end-node connections effectively supported depends on a connection’s RPI.