(Siemens Numerical Control Commissioning and Service Tools) is a specialized software suite designed for the commissioning, servicing, and optimization of SINUMERIK CNC systems, such as the 810D and 840D. Core Software Components
If you just want to learn the interface without paying for a full SinuCom license: siemens sinucom download upd free
Siemens offers several free communication or helper tools: and optimization of SINUMERIK CNC systems