To make sure you get the right setup, please let me know your and PLC model number . I can then provide the precise network parameters you need. Share public link

The Simatic PC Adapter USB A2 (6GK1571-0BA00-0AA0) was designed to be backward compatible, but Windows XP support is specific to certain service packs. Before attempting an installation, ensure your environment meets these criteria: Operating System: Windows XP Professional SP2 or SP3.

Move the adapter to a standard USB 2.0 port. If using a virtual machine, verify that the host controller settings are downgraded from xHCI to EHCI (USB 2.0) mode in the hypervisor settings. Error: "Driver is missing digital signature"

The adapter is receiving USB power, but it cannot communicate with the PLC network due to speed mismatches or bad cabling.