Dear Christop , I would like to replace New CPU 319F-3 PN/DP wiht the same type of old CPU , what we need to do? re-used old MMC is enough ? or i need to re-download program? thank you 

------------------------------------------------------------------------------------------
Split from How can i change an old cpu 319-3-pn/dp with exactly the same new cpu ?.

AutoGen_9883598

Dear Christop , I would like to replace New CPU 319F-3 PN/DP wiht the same type of old CPU , what we need to do? re-used old MMC is enough ? or i need to re-download program? thank you 

------------------------------------------------------------------------------------------
Split from How can i change an old cpu 319-3-pn/dp with exactly the same new cpu ?.

 Hi,

Assuming the part number is identical or a compatible successor, it is simply a case of inserting the SIMATIC MMC into the new CPU.

Be aware that any DB current values will revert back to initial values.