The historian can also push this data to external data warehouses for security purposes, and it can push data to various software analyses platforms, or to business intelligence and overall equipment effectiveness (OEE) dashboards.Īlthough all HMIs provide multiple ways to view current machine operating data, it’s often necessary to view historical machine operation data as it provides a number of benefits (Table 1). The gateway accesses data stored in the historian for presentation to operators and engineers. Other data is often entered into the historian manually, such as fault causes, detailed analysis, and quality assurance (QA) or statistical process control (SPC) product testing results. The HMI/SCADA gateway sends machine operation data to the historian for long-term data storage. A variety of methods are available to make information stored in historians readily actionable, such as trending, reporting, and pushing the data to external data analysis platforms. Historians can take many forms, from simple spreadsheets or personal database files, to full-featured database products available from a variety of manufacturers and running on many platforms, to dedicated data historian products capable of capturing and storing up to tens of millions of data points per second. This allows viewing and analysis of data at the HMI, the historian, and other software platforms. More big data value can be gained by making it more accessible for viewing and analysis, often by connecting an HMI to a historian, which is then connected to other software platforms. Historians provide a great way to store and access huge amounts of machine data, but this time-based information derived from "big data" collection must often be transformed for use by machine operators, plant engineers, and management in factories and plants.
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