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How to

How to


Products: AS-B, Edge Server, Enterprise Central, Enterprise Server, AS-P, Virtual Project Servers
Functionalities: Trends
Product version: 2024, 7.0
12/3/2024

Creating a Trend Log List

You create a trend log list to display records from a trend log.

Tip:

  • ​​If you are creating a trend log list from a trend log wizard, the procedure starts when you name the trend log list.

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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
Figure: 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, EcoStruxure BMS 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 .

Period Timestamps in Trend Charts and Trend Log Lists

When a calculated value for a period is presented, the middle of the period is used as the timestamp.

Example:

The calculated value for the period 8:00-9:00 is stamped 8:30. If there is a value at 9:01, the next period is 9:00-10:00, which is stamped as 9:30. The full period may not have passed yet, but the value can be presented even if parts of the period are in the future.

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 the EcoStruxure BMS software, 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 create a trend log list

  1. In WorkStation, in the System Tree pane, select the folder or EcoStruxure BMS server where you want to create the trend log list.

  2. On the File menu, point to New and then click Trend .

  3. In the Create Object wizard, in the object list, select Trend Log List .

  4. In the Name box, type a name for the trend log list.

  5. In the Description box, type a description for the trend log list.

  6. Click Next .

  7. In the Configure Trend Log List page, in the Display trend log box, enter the trend log you want to display in the trend log list.

  8. In the Log space (records) box, enter the maximum number of rows to display in the trend log.

  9. Click Create .

See Also

  • Trend Log Lists
  • Opening a Trend Log List
  • Create Object Dialog – Naming the Object Page
  • Create Trend Log List Wizard – Configure Trend Log List Page