Tom Jenkins said:
Well, it looks like it will do 300 and 200 with some limits.
Just to clarify it: STEP7 LITE is basically for the S7-300 range of PLCs. The ET200S and ET200X mentioned by controlled, are the CPUs that are S7-314's "in disguise".
The S7-200 range of PLCs is NOT supported.
The other important limitations are:
Online via MPI only, not via Profibus or Ethernet.
You cannot configure distibuted i/o via Profibus or Profinet, so there is "only" the maximum of 4 racks of 8 modules each (32 modules total).
You cannot configure "connections" (but HMIs can certainly connect to the CPUs without having to configure such connections).
The only software options that are possible, are PLCSIM and TeleService, so no GRAPH, SCL, HiGraph, etc.
But all in all it is a very usable software package.