46 Rockwell Automation Publication 1756-UM535D-EN-P - November 2012
Chapter 2 Design an Enhanced Redundancy System
Using HMI
Depending on the network used to connect the redundant system to HMIs, plan
for certain placement and configuration requirements. You can connect an HMI
to a primary chassis over either of these networks:
• EtherNet/IP
• ControlNet
HMI Connected via an EtherNet/IP Network
This table describes redundant system considerations specific to the HMI being
used on the EtherNet/IP network.
HMI connected to a redundant chassis pair exclusively over an EtherNet/IP
network can briefly drop the connection when a switchover occurs. The
connection is re-established, however, after the switchover is complete.
Type of HMI Used Considerations
PanelView Standard terminal Same as a nonredundant system.
• PanelView Plus terminal
• VersaView® industrial computer running
a Windows CE operating system
• Use RSLinx Enterprise software, version 5.0 or later.
• Set aside connections for each PanelView Plus or VersaView CE
terminal as indicated in this table.
FactoryTalk View Supervisory Edition
software with RSLinx Enterprise software
• Use RSLinx Enterprise communication software, version 5.0 or later.
• Keep the HMI and both redundant chassis on the same subnet.
• Configure the network to use IP swapping.
• FactoryTalk View Supervisory Edition
software with RSLinx Classic software,
version 2.52 or later
• RSView®32 software
• Any other HMI client software that uses
RSLinx Classic software, version 2.52 or
later
Limit the number of RSLinx servers that a controller uses to 1…3
servers, where the use of 1 server is ideal.
In this module Reserve
Controller 5 connections
1756-EN2T 5 connections
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