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How to

How to


Products: Automation Server, AS-B, Enterprise Server, AS-P, Project Configuration Tool
Functionalities: Trends
Product version: 1.9
12/14/2016

Configuring a Trend Log List

You configure the properties of a trend log list to meet the unique needs of your site.

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​The trend log list numerically displays the records of a trend log or an extended trend log. The records of the trend log can be processed by a calculation method before they are presented in the trend log list.

The trend log list can only display one trend log at a time and must be manually refreshed to display recently recorded values.

 
action_zoom_plus_stroke Trend log list, schematic

Trend log list, schematic

You can manually add records to a trend log list for any type of trend log.

Time Zone Modes in a Trend Log List

​In a trend log list, you can present the records of a trend log in different time zones: local time zone, SmartStruxure server time zone, and UTC time zone.

For more information, see Time Zone Modes in a Trend Log List .

Calculation Methods

​Use a calculation method to process the records of the trend log before presenting them in a trend log list or a trend chart. The original records in the trend log are not affected by the calculation method. The calculation method is applied to the trend log records grouped by a specific time interval.

For more information, see Calculation Methods .

Temporary Trend Log Lists

​To display a trend log without creating a new trend log list or trend chart, the trend log can be displayed in a temporary list or chart.

For more information, see Temporary Trend Log Lists .

Floating Point Values NaN, INF, and -INF

In Building Operation, the floating point values “Not a Number”, positive infinity, or negative infinity may be displayed in the Basic property tab, in a trend log list, or a trend chart.

For more information, see Floating Point Values NaN, INF, and –INF .

To configure a trend log list

  1. In WorkStation, in the System Tree pane, select the trend log list you want to configure.

  2. On the File menu, click Properties .

  3. Edit the properties:

    Table: Trend Log List Properties

    Component

    Description

    Display trend log

    Enter the trend log to display in the trend log list.

    Log space (records)

    ​Select the maximum number of records to display in the trend log list.

    Show events

    Select True to display events in the trend log list. This function does not hide events in the list that contain a value or comment. For example, when a record is added, edited, or commented.

    Time zone

    Select which time perspective to display in the trend log. For more information, see Time Zone Modes in a Trend Log List .

    Calculation method

    Select a calculation method.

    Delta over period

    Select True to apply a period to the delta calculation method.

    Period

    Select the time span for which the calculation method is to be executed.

    Custom period

    Enter a custom time span for which the calculation method is to be executed.

    Custom period alignment

    Enter the time when you want the custom period to start.

  4. Click OK .

See Also

  • Trend Log Lists
  • Trend Log List Properties
  • Configuring the Trend Log List Time Zone
  • Displaying the Trend Log List Time Stamps with Fractions