Allen-Bradley ControlLogix L7 User Manual

184 Rockwell Automation Publication 1756-UM001M-EN-P - February 2012
Chapter 12 Redundant Systems
Figure 42 - ControlLogix Enhanced Redundancy System
Redundancy requires no additional programming and is transparent to any
devices connected over an EtherNet/IP or ControlNet network.
Redundancy modules placed in each redundant chassis maintain the
communication between the redundant chassis.
Depending on how you organize your RSLogix 5000 project, outputs may or may
not experience a change in state (bump) during a switchover:
• During the switchover, outputs that are controlled by the highest priority
task will experience a bumpless switchover. For example, outputs will not
revert to a previous state.
• Outputs in lower priority tasks may experience a change of state.
For detailed information about ControlLogix redundancy systems, see the
ControlLogix Redundancy System User Manual, publication 1756-UM523
.
Logix5563
Redundancy Module
ControlNet
1756-CN2R
EtherNet/IP
1756-EN2T
1756-RM
1756-L6x
PRI COM OK
Logix5563
Redundancy Module
ControlNet
1756-CN2R
EtherNet/IP
1756-EN2T
1756-RM
1756-L6x
PRI COM OK
DC INPUT
DC OUTPUT
Analog Input
Analog Output
ST
AT
ST
AT
Diagnostic
ST
AT
ST
AT
Diagnostic
ST
AT
ST
AT
Diagnostic
ST
AT
ST
AT
Diagnostic
Relay Module
Digital Input
ControlNet
ControlNet Scanner
Relay Ouput
Analog Output
Analog Input
Digital Ouput
Ethernet
Switch
ControlNet
ControlNet Scanner
Workstation
HMI
Redundant Chassis
Primary Secondary
I/O Connected via ControlNet
I/O can be connected via an EtherNet/IP network beginning with Enhanced Redundancy System revision 19.50.

Allen-Bradley ControlLogix L7 Specifications

General

Brand	Allen-Bradley
Model	ControlLogix L7
Category	Controller
Language	English