Siemens SIMATIC STEP 7 V5.6 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: – Configuring and parameterizing the hardware – Specifying the communication. How to install Step 7 V5.5 sp4 on Windows 10 pro 64bit? To install STEP7 v5.5 SP3 (DVD update release) follow these steps.1. Download and install the latest.