Can OT alerts help a quality or safety investigation?

Yes, as one source of evidence among several. An OTOT: operational technology. The computers that run machines, production lines, building systems and utilities. alert tells you that a controller received a write from a host that is not allowed to write, or an S7comm command, or traffic outside working hours, with the source host, the controller and the time. Put it on a timeline next to the historian data, the HMI audit trail, the shift log and the maintenance records, and you can usually narrow down when and from where a change came. Make sure the clocks agree, because a few minutes of drift between systems makes timelines misleading. Note what alerts do not cover: an authorised write during the shift raises no alert, so the HMI trail stays your record of everyday changes. NetSenX keeps alerts for your plan's alert history; you read them in the dashboard, through the API from the Pro plan, or in your SIEMSIEM: security information and event management. A system that collects logs from many systems and looks for patterns across them. from the Business plan. They contain no written values and name no person.

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