How can I write a program in codesys (ST or IL) and put it on fatek FBs series PLC? It is posible? I was not using codesys before. I was using Ladder and other PLCs (Omron, Unitronics, Simens, Schnider Electric).
In order to be able to program a PLC with CodeSys, CodeSys RT (Runtime) has to be installed to the controller.
This RT environment acts as tiny OS. It includes all libraries and executables. For example you use function TON in your ST PRG. In order to execute it, there should be a library that define this function.
CoDeSys RT is made to support all IEC 61131-3 standards which includes support for all ST, LD, SFC, CFC, FBD, IL. CodeSys RT is also licensed. So if PLC developer wants their controllers to be programmed with CoDeSys, they purchase 1000 licenses and install RT on 1000 PLCs.
So as you can see, it is impossible to use other languages than one provided by FATEK.