OK I'm having some issues getting hooked upto an S7-300 CPU 315-2DP in Step7.
This is the adapter I have
https://www.amazon.com/dp/B0B6TW9XCH?psc=1&ref=ppx_yo2ov_dt_b_product_details
I'm running step7 v5.5 sp3 in an XP VM. I passed through the MPI adapter and it's seen fine in Windows XP and Step7 installed the driver for it, I didn't install anything externally.
S7-315 use MPI connection not PPI, you should look "PC Adapter(MPI)" on set pg interface.
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