Rockwell Automation 1756-RMxx ControlLogix Enhanced Redundancy System User Manual - Manual (Page 260)

260 Rockwell Automation Publication 1756-UM535D-EN-P - November 2012
Appendix C Upgrade from a Standard Redundancy System or to Another Enhanced Redundancy System
You are now ready to lock the system and initiate a locked switchover to update
the primary chassis. Continue with Step 10: Lock the System and Initiate a
Switchover to Upgrade .
Step 10: Lock the System and Initiate a Switchover to Upgrade
Once you have downloaded the RSLogix 5000 project you prepared, complete
these steps to lock your system and initiate a switchover.
1. Open the RMCT for the redundancy module in the primary chassis by
right-clicking on the RM module in RSLinx Classic software and selecting
Module Configuration.
2. Click the System Update tab.
3. Click Lock For Update, then click Yes.
4. Wait for the system to lock.
IMPORTANT Remain offline while completing these steps.
• Once you have locked the system, do not abort the system lock. Aborting the
system lock during this procedure clears the project from the secondary
controller.
• Do not disconnect any communication cables while completing these steps.
• Completing a locked switchover causes SFC instructions to be reset to their
initial state. This may result in SFC instructions executing twice.