Allen-Bradley 1756-CNB - Page 8

Publication 1756-UM523F-EN-P - December 2006
8 Table of Contents
Check the Allocation of Unused Memory . . . . . . . . . . . . . . 123
Adjust CPU Usage for a CNB Module . . . . . . . . . . . . . . . . . 123
Use RSLinx Software . . . . . . . . . . . . . . . . . . . . . . . . . . 124
Four-Character Display. . . . . . . . . . . . . . . . . . . . . . . . . 124
Send a Message to the CNB Module . . . . . . . . . . . . . . . 126
Store or Load a Project Using Nonvolatile Memory . . . . . . . 126
Store a Project to Nonvolatile Memory
While a Process Is Running . . . . . . . . . . . . . . . . . . . . . . . . 128
Chapter 7
Update Modules and Redundant
Systems
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Change CNB Modules from Series D to
Series E While Online . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Before You Begin . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Actions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Update a Redundant Control System Offline. . . . . . . . . . . . 136
Update an Online Redundant System . . . . . . . . . . . . . . . . 138
Redundant System Relationships. . . . . . . . . . . . . . . . . . 139
Appendix A
Set Up EtherNet/IP
Communication Across Subnets
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
Keep an HMI Communicating with the Primary Chassis . . . 148
Install the ControlLogix Redundancy
Alias Topic Switcher Software. . . . . . . . . . . . . . . . . . . . 149
Configure a Driver to Communicate with the Primary and
Secondary EtherNet/IP Modules . . . . . . . . . . . . . . . . . . 150
Create a DDE/OPC Topic for Each Controller . . . . . . . . 151
Create an Alias Topic . . . . . . . . . . . . . . . . . . . . . . . . . . 152
Set Up the Alias Topic Switcher . . . . . . . . . . . . . . . . . . 153
Address the Alias Topic in the HMI Project . . . . . . . . . . 154
Keep a Message Going to the Primary Chassis . . . . . . . . . . 154
Create a Periodic Trigger for the Messages . . . . . . . . . . 155
Get the Redundancy State of Chassis A . . . . . . . . . . . . 156
Get the Redundancy State of Chassis B . . . . . . . . . . . . . 157
Determine Which Chassis is Primary. . . . . . . . . . . . . . . 159
Send the Message to the Appropriate Controller . . . . . . 160
Appendix B
Convert an Existing System to
Redundancy
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163
Convert Local Modules to Remote Modules . . . . . . . . . . . . 163
Reconfigure the Local I/O Modules. . . . . . . . . . . . . . . . 164
Replace Local I/O Tags . . . . . . . . . . . . . . . . . . . . . . . . 164
Replace Any Aliases to Local I/O Tags . . . . . . . . . . . . . 166