186 Rockwell Automation Publication 1756-UM535D-EN-P - November 2012
Chapter 7 Program the Redundant Controller
Finalize Edits with Caution
When you finalize edits to your program while online, the original program that
existed before the changes were made is deleted. As a result, if the edits you
finalize cause a fault on the primary controller, the new primary controller will
also fault after the switchover.
Before you finalize any edits to your program, test the edits to verify that faults do
not occur.
Figure 57 - Test Edits Before Finalizing
Test Pending Edits Finalize All Edits
Even if you have not enabled the Retain Test Edits on Switchover property,
faults can still occur on the primary and secondary controllers if the edits
are finalized.
The Retain Test Edits on Switchover property affects only edits that are
being tested. The Retain Test Edits on Switchover does not affect the
redundant controllers that are running finalized edits.
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