Rockwell Automation Publication ICSTT-RM448J-EN-P - April 2018
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Install the AADvance System
Chapter 5
3. Insert a new battery, orientate it the positive (+) terminal to the right.
Trap the ribbon behind the new battery so it can be removed in the
future and then push the battery into the holder.
4. Put the cover back and secure it with the cross head screw.
5. Push the Fault Reset button on the processor module. The processor
Healthy LED will go green (applies if the module is part of a running
system).
If the battery is replaced when more than one processor module is installed
then the processor clock will be updated automatically through
synchronization.
If you have previously set up SNTP when you set up your processor module
then the clock will be reset to the current time automatically. If you have not set
up SNTP it is recommended that you do so, as this will not only reset the
processor clock but will also keep the time accurately during operation. Refer
to the AADvance Configuration Guide for the SNTP set up instructions. The
following applies:
• If the battery is replaced when only one processor module is installed
and the processor module is not powered up and SNTP has not been set
up, you must set the clock to the current time as soon as practicable.
• The battery does not do any function while the processor module is
powered and the application is running. The Processor’s Real Time
Clock provides Date and Time data for SOE functions and also for the
Processor diagnostic log entries.
The specific functions that the battery maintains on complete loss of power are
the following:
• Real Time Clock – The battery provides power to the RTC chip itself.
• Retained Variables – Data for retained variables is stored at the end of
each application scan in a portion of RAM, backed by the battery. On
restoration of power, the retained data is loaded back into the variables
assigned as retained variables for use by the application scan.
• Diagnostic logs – The processors diagnostic logs are stored in the
portion of RAM backed by the battery.
Set the Real Time Clock Manually
If the system has only one controller and does not have a different time server,
you have to set the processor real-time clock manually using RTC variables.
The following procedure assists in setting the clock:
Set up the following variables in the Dictionary
RTC Control Rack Variables (all BOOLEAN Outputs)
• RTC Control: RTC_Read
• RTC Control: RTC_Write
