If you have STEP 7 V5.5 installed, the driver is already on your hard drive. Look in:
C:\Program Files\Siemens\Step7\S7BIN\S7UPDUSB.INF
If "PC Adapter USB A2" does not appear in the selection list: Simatic Pc Adapter Usb A2 Driver Windows Xp
| Problem | Fix | |---------|------| | Driver installs but adapter not recognized | Uninstall driver, reboot, reinstall before plugging in | | COM port number > 16 | Manually change to COM1–COM4 in Device Manager | | “Device cannot start (Code 10)” | Try another USB port (USB 2.0 only, not USB 3.0) | | Missing DLL errors | Install .NET Framework 2.0/3.5 and C++ redistributables | If you have STEP 7 V5
Siemens does not offer standalone drivers like a printer. The driver for the PC Adapter USB A2 on Windows XP is bundled inside the STEP 7 installation software (Version 5.5 or later) or the SIMATIC Device Drivers DVD. | Problem | Fix | |---------|------| | Driver
If STEP 7 is not installed, the adapter will still work as a pure serial converter using only the USB COM driver, but you cannot use MPI/PROFIBUS protocols. Useful for PPI (S7-200) with third-party software (e.g., PC Access).
