When using a PC based controller, users rely on the ruggedness and open architecture of industrial PCs, coupled with the powerful SIMATIC WinAC software PLC. A SIMATIC S7 is integrated into the industrial PC as a software PLC and the PC-based controller is configured and programmed with STEP 7 in exactly the same way as a normal S7 controller. All the automation components are integrated into a single industrial PC, resulting in a complete and cost-effective solution. SIMATIC WinAC RTX F is the first failsafe software PLC with TUEV Certification.