Analyzing Trend Data

You can analyze the date and time for which you want to display the trend data performing the following activities:

 

Select the Time Range using the Time Range Scrollbar

You want to define the visible time range as well as the corresponding time window for a Trend View.

  • You are in an active Trend View.
  1. In the Trend View, navigate to the left or right slider (dark grey area) of the time range slider.
  • The shape of the mouse pointer changes and the tooltip displays.
  1. Drag the Time Range slider to the left or right until you have reached the desired time range.
  • The time range change continuously displays.
  • The Trend View displays the selected time range.
  1. Navigate to the Time Range slider (light grey area).
  1. Drag it to the desired time/data range.
  • The time range is displayed with the corresponding data period in the Trend View.
Information

NOTE:
Data is compressed for display purposes only if you select a large time range or very large number of measured values. All data is displayed for smaller time ranges.

 

Select Absolute Time Range
  • You are in an active Trend View.
  1. Right-click the Time Range bar and from the menu options select the Select range option.
  • The Select Date/Time dialog box displays.
  1. From the Selection type drop-down list, select Absolute.
  1. Click the displayed Start time.
  • The Calendar dialog box opens.
  1. Enter the desired start date in the Calendar dialog field.
  • Select month and year with the symbols.
  • Click the appropriate date.
  1. Click the displayed time at Start time and enter the desired start time.
  1. Click the displayed End time.
  • The Calendar dialog box opens.
  1. Click the displayed time at End time and enter the desired end data in the Calendar dialog box.
  • Select month and year with the symbols.
  • Click the appropriate date.
  1. Click the displayed time at End time and enter the desired stop time.
  1. Click OK.
  • The Select Date/Time dialog box closes and the Trend View displays the defined time range.

 

Select Relative Time Range from a Start Date
  • You are in an active Trend View.
  1. Right-click the Time Range bar.
  1. Click Select range.
  • The Select Date/Time window displays.
  1. Select the Relative option in the Selection type drop-down list.
  1. In the Interval text field, enter a time range from 1 to X and select the corresponding time unit in the drop-down list.
  1. From the Start/end time drop-down list, select Starting.
  1. Click the displayed date and enter the desired start date in the Calendar dialog box.
  • Select month and year with the symbols.
  • Click the appropriate date.
  1. Click the displayed time and enter the desired start time.
  1. Click OK.
  • The Select Date/Time dialog box closes and the Trend View displays the defined time range.

 

Select Relative Time Range from a Stop Date
  • You are in an active Trend View.
  1. Right-click the Time Range bar.
  1. Click Select range.
  • The Select Date/Time window displays.
  1. From the Selection type drop-down list, select Relative.
  1. In the Interval text field, enter a time range from 1 to X and select the corresponding time unit in the drop-down list.
  1. From the Start/end time drop-down list, select Ending.
  1. Click the displayed date and enter the desired stop date in the Calendar dialog box.
  • Select Month/Year with the symbols.
  • Click the appropriate Date.
  1. Click the displayed time and enter the desired stop time.
  1. Click OK.
  • The Select Date/Time dialog box closes and the Trend View displays the defined time range.

 

Select Relative Time Range from a Current Date
  • You are in an active Trend View.
  1. Right-click the Time Range bar.
  1. Click Select range.
  • The Select Date/Time window displays.
  1. From the Selection type drop-down list, select Relative.
  1. In the Interval text field, enter a time range from 1 to X and select the corresponding time unit in the drop-down list.
  1. Select the Ending now option in the Start/end time drop-down list.
  1. Click Now.
  1. Click OK.
  • The Select Date/Time dialog box closes and the Trend View displays the defined time range.

 

Select Time Range from Predefined Time Ranges

Time range

  • You are in an active Trend View.
  1. Move the mouse cursor to the Time Range slider (light grey area).
  1. Right-click the Time Range slider.
  • Predefined time ranges display.
  1. Select the desired time range.
  • The time range displays with the corresponding data period in the Trend View.
Information

NOTE:
The display calculation is always based on current visible date range.
Depending on the position of the current Trend View, the starting point may not be at the start of the day.

Start/Stop Range

  • You are in an active Trend View.
  1. In the Trend View, point the mouse to the left or right end point (dark grey area) for the Time Range slider.
  • The mouse pointer changes shape and the tooltip displays.
  1. Right-click the Time Range slider.
  • Predefined time ranges display.
  1. Select the desired time range.
  • The time range displays with the corresponding data period in the Trend View.
    The display calculation is always based on current visible date range as displayed in the tooltip.

 

Switch between Automatic and Stop Mode

Automatic mode normally is used to analyze trend data (continuous scrolling of the graphic curves).
The latest data is automatically retrieved from the system.
You can change to Manual mode for a detailed analysis (scrolling off).
In this case, the data is no longer updated automatically.

  1. Click Stop .
  • This stops automatic data updates and suppresses the symbol to update Trend View.
  1. Define the desired date range using the slider or time bar.
  1. Click Refresh when the symbol is available and you want to upload the latest data from the History Database.
  1. Click Run to update data on a continuous basis.

 

Use Compare View

The compare view is ideal for extended data analysis with time offset.

  • You are in a Trend View and Manual mode is on.
  • The Property window of the Trend View is closed.
  • The time period for display is defined using the time range scrollbar (for example, 12 hours).
  1. Click Stop and then click Compare View .
  • The same Trend View displays a second time.
  1. Define the appropriate time/date range with the scrollbar.
  1. Select time offset Forward or Backward.
  1. Do one of the following:
  • Click one of the predefined offset buttons, for example 1 hour.
  • Select your own range by selecting the dark button, for example, 3 hours, and select the time offset.
  • Compare view displays with the corresponding time offset and measured values.

 

Use Mouse Zoom

The zoom function allows you to select a time range in the currently selected Trend View
(applies as well for the comparison view) by zooming in on the X-axis and Y-axis.

  • You are in an active Trend View and in the Stop mode.
  1. Click Zoom .
  1. Navigate to the left zoom starting range.
  • The point changes shape and the tooltip displays the current position.
  1. Drag the pointer to the right zoom end range.
  • The selected zoom range displays in the Trend View.
  1. Click Zoom .
  • The original time range, prior to the zoom in, displays, even if you zoom multiple times.

 

Select Table View
  1. Click Stop .
  • The automatic data update is stopped.
  1. Click table view
  • The table opens in default view.
    Click the time stamp header to sort the rows by ascending or descending order.
  1. Click to show or hide interpolated values.
  • Interpolated values are displayed in light-grey.
  1. Click table view again .
  • The graphical Trend View re-displays.
  1. Click Run to start the automatic data update.
    NOTE: The priority displays in the table if a subsystem supports information on BACnet write priority (1-16).

 

Highlight Data Series Temporarily

During analysis, it is helpful to temporarily bring a certain series in the Trend View to improve the readability of the trend curve.

  • Multiple trend curves display in the Trend View.
  1. Drag the pointer to the trend curve you want to bring forth.
  • All non-selected trend curves are reduced in their display intensity.
  • The measured value, as well as time and date, are displayed in tooltip at the pointer position.
  • The quality attribute is brought forwards only when one trend curve is visible.
  1. Drag the pointer to once again view all trend curves.

 

Hide Data Series Temporarily
  • Multiple trend curves display in the Trend View.
  1. Click Properties .
  • The menu bar displays.
  1. Select the series you want to hide in Legend.
  1. Click Series Properties.
  1. Clear the Visible check box.
  • The menu bar is hidden.
  • The series is hidden in the Trend View.
  • The Trend data is still recorded for this series, but is no longer displayed.
  1. Click Save .
  1. Repeat Steps 2 through 4 for any additional series you want to hide.
    NOTE: You can also click or on the legend to show or hide each individual trend curve.

 

Remove Data Series from Trend View
  • Multiple trend curves display in the Trend View.
  1. Select the series you want to hide in Legend.
  1. Clear the check box in the Remove column.
  • The Remove Trend Series dialog box displays.
  1. Perform either of the following steps:
  • Deselect the Stop trending this object on the Management Platform check box.
    In this situation, the selected series is deleted from Trend View.
    The Trendlog object is still available in the Online Log Objects folder.
    All data continues to be recorded (Subscribe=On).
  • Select the Stop trending this object on the Management Platform check box.
    In this situation, the series and the associated Trendlog object are deleted.
    The Trendlog object is removed from the Online Log Objects folder.
    All recorded data remains available, but no new data is recorded (Subscribe = Off).
    The previously logged data is still available if you reuse the same data point in the Trend View.
    However, there is a gap in the data between delete and re-generation.
  1. Click OK.
  • The trend series is removed from the current Trend View.
  1. Click Save .
Information

NOTE:
When an object is deleted, no warning displays if a Trendlog object is used in several Trend Views. All associated data is lost in the associated Trend Views.