Simatic S7 PLCSIM V16 requires activation and licensing to function. You can:
Specifically, is the version designed to integrate seamlessly with TIA Portal V16 (Totally Integrated Automation Portal). It allows users to simulate S7-1200 and S7-1500 controllers, mimicking the behavior of a physical PLC down to the cycle times and memory allocation. simatic s7 plcsim v16 download