Allen-Bradley 1756-CNB User Manual page 137

Action
3. Disqualify the secondary chassis,
4. Upgrade the required firmware of the
secondary chassis.
5. Make the secondary controller the new
primary controller.
6. Clear the fault of the new primary
controller.
7. Upgrade the other redundant chassis.
8. Change the Auto-Synchronization Option
to Always.
Details
A. Click Configuration.
B. Set Auto-Synchronization to Never.
C. Choose Apply and then Yes to confirm.
D. Click Synchronization.
E. Choose Disqualify Secondary and then Yes to confirm.
See the ControlLogix Controller and Memory Board Installation Instructions, publication
1756-IN101.
A. Start RSLogix 5000 software.
B. Download the project to the secondary controller.
C. When it is safe to stop the system, change the primary controller to Program Mode.
D. Turn off power to the primary chassis.
E. Go to the 1757-SRM properties of the secondary chassis.
F. Choose Become Primary.
A. In RSLogix 5000 software, go online to the new primary controller.
B. The controller is faulted. When a disqualified secondary controller becomes a primary
controller, the controller experiences a major fault.
C. From the Communications menu, choose Clear Faults.
D. To start control of the process, from the Communications menu, choose Run Mode.
A. Turn on power to the other redundant chassis.
B. Upgrade the required firmware of the chassis.
A. Open the SRM configuration tool for the primary chassis.
B. On the Configuration tab, change the Auto-Synchronization option to Always.
C. Choose OK.
Update Modules and Redundant Systems
Publication 1756-UM523F-EN-P - December 2006
137