How to know my cpu firmware version and how to update it?

how to know my cpu firmware version and how to update it and needed requirements?

and if i update it, it will need extra memory size? and how to know my cpu memory size and also inserted memory card size which already inserted in cpu?

regards,

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Split from Totalizer Block for 4 flow meters.

open the device diagnostic of the plc in simatic manager , on the first page the FW Version is displayed.

Look in the CS Site for the newest update (enter MLFB of the PLC and select download)

read the Update notes if you really need the new FW !

if you need a memory extension for the update depands which PLC you use and if you have a memory card or not.

regards
Christoph