Connections Over An Ethernet/Ip Network - Allen-Bradley 1769 User Manual

CompactLogix Controller with
Integrated EtherNet/IP Port
PowerFlex 700S AC Drive
with DriveLogix
Figure 4 - CompactLogix EtherNet/IP Overview
FlexLogix Controller with
1788-ENBT Module
CompactLogix
Controller with
1756-ENBT Module
Switch
Workstation

Connections over an EtherNet/IP Network

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.
All EtherNet/IP connections are unscheduled. An unscheduled connection is a
message transfer between controllers that is triggered by the requested packet
interval (RPI) or the program, such as a MSG instruction. Unscheduled
messaging lets you send and receive data when needed.
Rockwell Automation Publication 1769-UM011H-EN-P - April 2012
Communicate over Networks
Distributed I/O
1756-ENBT Module
(as an adapter) with 1756 I/O
Modules
1794-AENT Adapter with 1794
I/O Modules
1734-AENT Adapter
with 1734 I/O Modules
Chapter 4
49