I'm sure the S7-412 can be part of this but probably not the main part. I'm not sure why you are focussing on the 412 HW as this is just HW, the main issue is communication and inter-operability. HART will leverage into Profibus PA somehow.
However, this is not my expertise so I suggest you contact somebody in Siemens local to you and perhaps start with the PCS7 people: