You can download the trial package (which includes S7-GRAPH and STEP 7 Professional 2017 SR2) directly from the Siemens Industry Support Portal .
Siemens does not offer a permanently free version of STEP 7 V5.6. However, you can download a for testing purposes. Trial Period: 21 days of full functionality.
You must be a registered user to download software due to export restrictions. Windows 7 System Requirements
is the classic engineering software used to configure and program Siemens SIMATIC S7-300 and S7-400 controllers. While newer systems often use the TIA Portal, version 5.6 remains critical for maintaining older industrial machinery. Is SIMATIC Manager STEP 7 V5.6 Free?