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Historical Data File Trend Plot

This historical trend plot provides a graphic view for historical data selected in the Data File Viewer.

EnVision Historical Trend Plot

Dragging on the trend scale (left side of trend) or trend time (bottom of trend) allows the user to interactively change the trend scale or move forward/backward in time to view historical trend data.

The -100 to +100 scales at the bottom and to the right of the trend are for scale/time compression/expansion.  This is an analysis tool to "zero" in on specific data on the trend.   It's a zoom in/out for the trend scale and time scale.  In the historical plot, these scales are real time so the data will move as you adjust the zoom level.

The only limit to the number of channels is the size of the window to view the data and computer memory. Technically if EnVision was connected to 128 Orion-M systems, each with their maximum of 60 data points a total of 7,680 channels could be in the System Data Log file.

Chart Annotation
The default chart annotation (name shown on top of trend) for a history plot is the current data log file name.  This can be changed be pressing the “Edit Chart Text” button on the history plot toolbar.  When pressed, the Chart Annotation dialog box will be shown.  The user can then enter a description for the history plot with up to 255 characters.

EnVision Chart Annotation

Operator Message
If the Operator Message column is included in the Trend Plot all Operator Messages will be shown in the Plot.

The toolbar at the top of the trend screen provides the following functions (from left to right):

Page Navigation - Jump to the specific page in the EnVision Tour

1. EnVision Navigation
2. Device Thumbnails Overview
3. Digital Values
4. System Alarms
5. EnVision Device Alarms
6. PC based Alarm Relay Output
7. General and Service Device Notes
8. Real-Time Trends
9. Single Loop Tuning
10. Data Logging Overview
11. System Data Logging
12. Device Data Logging / Historical Data File
13. Logging Overview Monitor
14. Historical Data File Viewing
15. Searching Historical Data Files
16. Historical Data File Trend Plot
17. CFR21 Part 11 and NADCAP AMS2750E: Historical Data files (Data Log) and Digital Signatures
18. Orion-M iSeries Detail View


19. Orion-Mi / nCompass CM Detail View Tab
20. Orion-Mi / nCompass CM Detail View: Auto Tune and Auto/Manual Tabs

21. Orion-Mi / nCompass CM Data Logging Tab
22 Orion-Mi / nCompass CM Schedules Tab (Ramp/Soak Profiles)
23. Orion-Mi / nCompass CM Profile/Schedules: Run, Stop & Hold Profile Schedules

24. Orion-Mi / nCompass CM Schedule Editor Overview
25. Orion-Mi / nCompass CM Schedule Editor: Guaranteed Soak, Loops Active and Auto Start
26. Orion-Mi / nCompass CM Schedule Editor: Stage "Wait For"

27. Orion-Mi / nCompass CM Schedule Editor: Schedule Notes
28. Orion-Mi / nCompass CM - Setup Tab
29. Orion-Mi / nCompass CM Detail View - Setup/IO Monitor
30. Orion-Mi / nCompass CM Detail View - Setup/Schedule Options

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