Communication On The Ethernet/Ip Network; System Performance; Input / Output Traffic Prioritization; Connections - Rockwell Automation Allen-Bradley 1715-AENTR User Manual

Chapter 1 Redundancy System Overview

System Performance

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For Ethernet considerations, see EtherNet/IP Network Configuration User
Manual, publication ENET-UM001, and ControlLogix Redundancy User
Manual, publication 1756-UM535.

Communication on the EtherNet/IP Network

Communication to a simplex module is addressed to the slot number for that
module. CIP communication to modules in a duplex configuration (including
the adapters) is addressed to the lowest slot number for the module pair.
The adapters respond with CIP errors for attempts to communicate to an I/O
module of a type that is not the same as the physically installed module.
The termination assembly type (simplex/duplex) determines the CIP messages
for corresponding CIP objects that the adapter processes for each I/O module.
This section discusses connections and RPI settings for the 1715 Redundant I/O
System.

Input / Output Traffic Prioritization

Note:In order to respect its IO schedule, the 1715 privileges class 1 (IO) traffic
over class 3 traffic.

Connections

The adapter has one required connection and does not support a rack
connection.
Each I/O module has one required connection (simplex or duplex).
For example, the system in
one is simplex. They are all configured for data connection.
Rockwell Automation Publication 1715-UM001J-EN-P - December 2020
Figure 12 has five I/O modules. Four are duplex and