Page Comparison

The TPRI.TriggerEd object acts purely as a run-time user interface for interacting with the historical trend system.  The buttons along the top row of the screen allow the user to create a New trigger definition, Load an existing trigger, Save the current trigger, Activate the current trigger, or Deactivate the current trigger.

Below the row of buttons are a set of fields to configure general information about the trigger.

Below the general information fields are two columns of variables.  The left column of Trigger Variables allows for specification of all variables that define the trigger.  Each line in this list defines a Boolean operation; the trigger is considered active when every one of these operations is satisfied.  Each operation is defined by a variable name, a comparison operator and comparison value selected; hence the operation is considered true when the associated variable on the host system meets the specified criterion.  In order to facilitate variable selection, each of the variable name entry fields are TPRI.DDVarSelect [LINK] objects; clicking on the '*' in the upper right hand corner of the text box will load the data dictionary browser form.

The right column of variables, the Trend Variables, specifies each of the variables that should be recorded while the trigger is considered active.  Like the Trigger Variable names, the data dictionary browser can be loaded by pressing the '*' in the upper right hand corner of any of the Trend Variable entry text boxes.