Definition: Trend

A trend defines which process variable is to be recorded in which way. A trend must belong to an archive.

Once you have created a trend in an archive, you can define the parameters for the trend either in the table editor or on the properties pages.

The parameters are grouped on the following tabs on the properties pages:

• General

  This tab contains necessary parameters such as name and trend variable.

• Recording

  This tab contains settings for hysteresis and filtering the data before recording.

Parameter name	Description of the
Definition active	Determines whether the object definition is valid.
Mode (filter)	Filter method before recording
Depth (filter)	Setting for the Filter parameter
Hysteresis	Recording hysteresis (difference value at which a variable value is recorded)
Mode (hysteresis)	Determines how the value of the hysteresis parameter is interpreted.
Comment	Optional commentary on the object.
Maximum	Recording maximum (variable or constant)
Minimum	Recording minimum (variable or constant)
Name	Name of the object.
Text	Localisable text for the object.
Trend variable	Name of the process variable to be recorded

• Archive