STEP 7 Lite is designed for traditional PLC applications with centralized I/O. STEP 7 Lite is designed for non-networked automation applications using the SIMATIC S7-300 PLC, the C7 all-in-one PLC and HMI, and the intelligent CPUs of the ET200 distributed I/O family. With award winning usability, STEP 7 Lite is extremely easy to use. Everything you need to program your CPU is available at your fingertips, from graphical hardware configuration to logic configuration using IEC 61131-3 ladder logic (LAD), function blocks (FBD) and instruction list (STL). Offline PLC simulation is available through the optional S7-PLCSIM software. Everything developed in STEP 7 Lite is fully transferable to STEP 7 Basis as your application grows in complexity – protecting your engineering investment.