Trend Historian

Trend Historians (or Recorders) are widely used where data is required to be stored and secured for future analysis:

	Food & Drug Manufacture and Distribution (FDA: CFR21)
	Environmental Monitoring
	Storage Facilities
	Product Testing
	Research & Development
	Pressure Vessel Monitoring

Multiple trend recorders provide an effective replacement for multiple chart recorders and are ideal for Batch Process Applications.

Customised operator displays and process trend charts are easily configured to create eye-catching dynamic displays for local control, while at the same time making the same displays available as Web pages. This means that recent historical trends can be integrated into web-pages.

In common with other objects in the Hexatec software, auto-creation wizards and advanced drag-drop operations make the task of Recorder creation easy.

Individual Recorders

Recorders will routinely gather data to a data store file.

Recorded data is displayed in as a real-time trend graph on a display page.

The trend graph is persistent, that is, the historical data on the display is retained even when you change displays or restart the system.

The Recorder defines the data store file and its management. There may be many separate data recorders within a configuration, so it is possible to create a series of independent data-logging tasks. This is especially useful when there is a requirement to segregate data for separate analysis, e.g. Process Control Data, Environmental Data, Quality Records, Batch Production, etc.

Each Recorder object contains one or more RecorderGroups, to make data analysis and management easier.

Tools are supplied, which allow read-only access to the data stored within the Recorder files. These include:

	Data conversion tool to allow import into Excel
	An ActiveX object which offers graphical displays of recorder data for inclusion in your own applications
	An OLE DB provider, which allows read-only access to recorder data from Visual Basic and other programming tools.

Recorders have an internal memory buffer, which can be used for temporary storage of the data scans. This enables a recent history sequence to be available for storage. A scrolled buffer gathers data, up to a predetermined limit. The buffer can also be used as a temporary store should the main recorder file become unavailable.

Individual Recorders

More on Recorders

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