Rockwell Automation 1756-RMxx ControlLogix Enhanced Redundancy System User Manual - Manual (Page 191)

Rockwell Automation Publication 1756-UM535D-EN-P - November 2012 191
Monitor and Maintain an Enhanced Redundancy System Chapter 8
Verify Date and Time
Settings
After you have completed programming your redundant system and have
downloaded your program to the primary controller, check the Redundancy
Module Date and Time information and verify it matches the date and time of
your system.
If the date and time are not correct, the redundant system event logs will not
match the date and time information for the rest of the system. Incorrect date and
time information complicates troubleshooting if an event or error occurs on your
redundant system.
TIP Consider checking the Redundancy Module Date and Time as a part of your
regular maintenance procedures. Verifying the date and time information
on a regular basis keeps the event logs of the redundancy modules
accurate.
Verify Date and Time
Settings
2
IMPORTANT If power to one of the redundancy modules is cycled, the redundancy
module will power up with the time set to when the power was lost. If the
partner redundancy module has remained active during this time, the time
set in that module will be automatically transferred to the powering-up
module. If a power failure event happens so that both modules are shut off,
reset the time and date in the RMCT.
Setting and verifying the date and time settings after a power loss will help
with troubleshooting if an error or event occurs.