A very common issue in the Asian market is having Chinese characters in the Windows user folder path. Ensure your Windows user account name is in English. If it contains Chinese characters, the installation will fail due to path decoding errors.
The strongest argument for using V15.1 is the perfect compatibility with the TIA Portal V15.1 IDE. Using the same version ensures that all new PLC functions, firmware features, and communication protocols introduced in that release are fully supported in the simulation. simatic s7plcsim v151 download better
To download effectively, you should prioritize the official Siemens Industry Support portal, as this ensures you have the correct trial version that can be activated with a valid license. How to Download S7-PLCSIM V15.1 A very common issue in the Asian market