Hello,

in the case of CPU modules that have a built-in EPROM you can use the "Copy RAM to ROM..." function to copy the content of the internal RAM load memory to the built-in EPROM load memory so as not to lose data in the case of power failure without battery or overall reset. In the case of SIMATIC S7-300 CPUs or C7 devices with internal EPROM as load memory the code and data blocks are written from the RAM load memory to the EPROM load memory.

With best regards
Cicero