PLCs processor

Hi
Does anyone in your know about what processor or microcontroller used in Siemens products?
One of my friends told me that Siemens uses ARM and FPGA some of plcs
Thanks

sorry but that detail is mainly unimportant to me.
But If you new howmany variations of siemens products exist.
the catalogues fill half a shelf.
so keep searching

That is depending on type of PLC,
however most of them are related to the intel family like z80 8051 and better.
yes ARM are used in small ones.

codesys is used on many diffrent platforms including ARM