If you are working in an industrial environment, ask your IT administrator or your Siemens distributor. They often have access to the "SIMATIC Net" DVD or specific download links provided with hardware purchases.
How to download the primary setup tool ? - Siemens SiePortal siemens primary setup tool 4.2 download
: The PST is traditionally supplied on the CD/DVD that comes with hardware like Scalance switches or ET 200 modules. If you are working in an industrial environment,
The is a specialized utility used to assign network parameters, such as IP addresses and device names, to SIMATIC NET network components, Industrial Ethernet CPs, and gateways. Download Information to SIMATIC NET network components