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Concept

Concept


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

Trends Overview

arrow1_rotationTrend Log Types arrow1_rotationTrend Log Functions arrow1_rotationTrend Units arrow1_rotationTrend Charts arrow1_rotationTrend Log Lists arrow1_rotationMulti Trend Log Lists arrow1_rotationMove or Copy Trend Logs or Extended Trend Logs arrow1_rotationMass Create

The function of a trend log is to log the variable that it is connected to and store the records.

To be able to store larger amount of records, you connect an extended trend log. The records of the trend log and the extended trend log can be presented numerically in a trend log list or graphically in a trend chart. The records can also be processed by a calculation method before they are presented.

 
action_zoom_plus_stroke Trend overview.
Figure: Trend overview.
Note:

A trend log that monitors an enumeration records the enumeration value and not the enumeration definition.

For more information, see Event and Alarm Enumerations .

For more information, see Trend Log Enumerations .

Trend Log Types

You use a trend log to collect data and then store the records. A record contains a log value or an event as well as its time stamp and an optional comment. A trend log can log an analog variable, a digital variable, or an integer variable.

For more information, see Trend Log Types .

Trend Log Functions

​All trend logs store records by using the circular storing principle; you can also connect trends logs to external trend logs with larger storing capacity. For some trend logs you can set up conditions that have to be fulfilled before the trend log starts recording.

For more information, see Trend Log Functions .

Trend Units

You can define the unit of a trend log when the trend log is created or on a previously created trend log where no unit has been set.

For more information, see Trend Units .

Trend Charts

​A trend chart displays the records of a trend log or an extended trend log as a series.

For more information, see Trend Charts .

Trend Log Lists

​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.

For more information, see Trend Log Lists .

Multi Trend Log Lists

You configure a multi trend log list to display values from multiple trend logs in one list. You compare values in a multi trend log list when you commission or validate a Building Operation system.

For more information, see Multi Trend Log Lists .

Move or Copy Trend Logs or Extended Trend Logs

When moving or copying a trend log or extended trend log to another SmartStruxure server, only the configuration of the trend log is transferred. If you copy the trend log to another SmartStruxure server, all recorded values are preserved in the original trend log while the copy on the other SmartStruxure server does not contain any recorded values. If you move the trend log to another SmartStruxure server, the configuration of the trend log is preserved but the record values are lost.

Notice

Loss of data

Recorded values are lost when you move or copy a trend log to another SmartStruxure server.

Failure to follow these instructions can result in loss of data.

Mass Create

You use the mass create feature to create multiple identical alarms or trend logs for different objects, instead of creating the alarms or trend logs one by one. From trend logs, you can mass create extended trend logs.

For more information, see Mass Create .

See Also

  • Function Overview
  • Trend Log Types
  • Event and Alarm Enumerations
  • Trend Log Enumerations
  • Trend Log Functions
  • Trend Units
  • Trend Log Lists
  • Trend Charts
  • Multi Trend Log Lists
  • Mass Create