Schneider PLC CPU 140-CPU-671-60 Power cycle

Hello every one,
I am using Schneider PLC CPU P266 140-CPU-671-60 in redundant configuration. I want to power off both Schneider CPU due to some work. Both CPU having Battery inside. Both PLC CPU LCD display not showing battery fault.

My question is, if I switched off & ON both CPU power then is there any loss of program inside PLC CPU or any SCADA set-point will reset..??

Please suggest...

Thanks

It depends how the plc is setup in the config. Software might write default values to certain %MW.
Make a data backup of the cpu's. If values are different after bootup you can always load the backup you saved.