Rockwell Automation 1756-RMxx ControlLogix Enhanced Redundancy System User Manual - Manual (Page 115)

Rockwell Automation Publication 1756-UM535D-EN-P - November 2012 115
Configure the Redundancy Modules Chapter 6
Chassis ID
The chassis ID parameter is used to assign a generic label to the chassis that house
the redundancy modules. The available chassis labels are Chassis A and Chassis B.
If you change the chassis label in the RMCT of the primary redundancy module,
the secondary module and chassis are automatically assigned the other chassis
label.
The chassis label assigned to the module remains associated with the same
physical chassis, regardless of its primary or secondary control designation.
Enable User Program Control
If you plan to use MSG instructions in your controller program to initiate a
switchover, change the redundancy module time, or conduct synchronization,
then you must check Enable User Program Control in the Configuration tab.
If you leave Enable User Program Control unchecked, the redundancy modules
do not accept any commands from the controller.
Redundancy Module Date and Time
The Redundancy Module Date and Time parameters can be applied separate
from the Redundancy Module Options parameters. The time specified with
these parameters is the time referenced by the event logs when a redundant
system event occurs.
To make changes to the redundancy module time settings, use the pull-down
menu or type your changes then click Set to implement time changes. Or, to set
the redundancy module’s time to match that of the workstation, click Apply
Workstation Time.
IMPORTANT We recommend that you set the redundancy module date and time when you
commission a system. We also recommend that you periodically check the date
and time settings to make sure they match those of the controller.
If a power failure occurs on the redundant chassis, you must reset the date and
time information of the redundancy modules. The modules do not retain those
parameters when power is lost.