which ARM version that i should use for PLC

hello ! i am houssam an electrical engineering student, i am new to this forum and new for ARM processore i want to make my own PLC (programable logic controler), and i need a processore for to build...
which ARM version that i should use for PLC

hello ! i am houssam an electrical engineering student, i am new to this forum and new for ARM processore i want to make my own PLC (programable logic controler), and i need a processore for to build...
arm cortex a9 used in control edge plc

control edge builder configuration tools used for control edge plc which used arm cortex a9 processors.PLC ip which used for communicating for configuaration has lost .do you have any option to recover...
How to construct any variable retention like PLC systems?

When the power supply shutting down, value of some variables is important and need to retention. How to construct it? I used static ,extern, to define this variable, but fail. Chip board:STM32F0Discovery...
How to construct any variable retention like PLC systems?

When the power supply shutting down, value of some variables is important and need to retention. How to construct it? I used static ,extern, to define this variable, but fail. Chip board:STM32F0Discovery...