Siemens SIMATIC STEP 7 software is the professional tool for the SIMATIC S7, SIMATIC C7 and SIMATIC WinAC automation systems. It enables the user to use the performance capability of these systems easily and conveniently. SIMATIC STEP 7 contains convenient functions for all phases of an automation project. Where do you procure the current trial software for STEP 7 V5.6?