Migration from TXP T2000 to T3000 Without Changing Field I/O and Software

Hello
Is there any solution for migration from Siemens TXP T2000 without changing Field I/O Cabinets and Logic and Software.
there is Process Unit (PU) and Server Unit (SU) and S7 Server for one S5 Engineering Station Diagnostic System (ES/DS) that I think these should remove and New 2 Application server and some Thin Client and time server should add to system.
there might be one interface server for this case. i need to know about the interface server, the model, version, and Administration commands for Setup this migration

Thanks and best regards
 
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