: Regarding a free download of Proficy Machine Edition 8.5, it's essential to note that software like Proficy Machine Edition is typically licensed and may not be freely available. Attempting to download or use such software without proper licensing can violate software usage agreements.

: Proficy Machine Edition is a comprehensive software solution for industrial automation and control. It provides a platform for developing, testing, and deploying control applications on various hardware platforms. Proficy Machine Edition supports a wide range of automation devices and offers features like programming, testing, and diagnostics.

Here's some general information about Proficy Machine Edition: