is a stable, feature-rich IDE for programming LOGO! smart relays, especially for existing industrial machines or small automation projects. While Siemens now promotes V8/V9, V7 remains a valid choice if:

If you already own a legal older version (like V6), you can download the V7.1.5 Upgrade for free.

: Siemens does not offer a standalone "full version" download for V7 or any newer version. To get the full software, you must originally purchase the DVD license 6ED1058-0BA02-0YA1 Upgrading is Free

You can view or download the LOGO! Soft Comfort Online Help (PDF) which acts as the official manual for version 7.0. Version 7.0 Key Features