To get the official, malware-free files, you should always go through the portal. 1. Official Siemens Support Portal

Deep in a German PLC forum, a user named S7_Ghost posted in 2015: “Update 3 fix for IM 151-8 PN/DP CPU. Mirror link (expires in 7 days).” The link was dead. But a reply underneath read: “I still have it. Email me.”

Key points: