Technical Reference Manual - InduSoft

Background Tasks
Scheduler worksheet
A Scheduler worksheet is used to execute program logic (using the Built-in Scripting Language) at a specific
date/time, on a regular time interval, or upon a triggering event.
To create a new Scheduler worksheet, do one of the following:
• On the Insert tab of the ribbon, in the Task Worksheets group, click Scheduler;
• Right-click the Scheduler folder in the Project Explorer, and then click Insert on the shortcut menu; or
• Click New on the Application menu, click the File tab, and then select Scheduler Worksheet.
To edit an existing Scheduler worksheet, double-click it in the Project Explorer.
The Scheduler worksheet is divided into two areas:
Scheduler worksheet
• Header area (top section), which contains information for the whole group
• Body area (bottom section), where you define each tag, expression, and condition for the group.
Use the parameters on this worksheet as follows:
• Description field: Type a description of the worksheet for documentation purposes.
• Event drop-down list: Click to select an event type from the following:
• Calendar: Generates time bases greater than 24 hours. For example, You can define an event that prints
a report every Friday at a specific time.
Note: Be sure to complete the Date field if you want a specific date for event execution.
• Clock: Generates time bases smaller than 24 hours (intervals in minutes or seconds). This function is
frequently used with trend graphics. For example, you can define a tag that will be incremented each
hour.
• Change: Event related to the change of a tag in the Trigger field.
Note: This only works for tag changes on the project server, regardless of a tag's defined
scope.
• Trigger field: This field is used only with the Change Event type. Type the name of a project tag in this field,
and when the value of the tag changes, Expression is evaluated.
• Time field: This field is used with the Calendar and Clock Event types.
If the Event type is Calendar, then Time is a specific time of the day on Date. When that Date and Time occurs,
Expression is evaluated.
If the Event type is Clock, then Time is a time interval starting from when the project was run. Every time
the interval occurs, Expression is evaluated.
Either way, type a time using the HH:MM:SS.ms format. Valid values are 00 to 23 for hours, 00 to 59 for
minutes, 00 to 59 for seconds, and 1 to 9 for milliseconds. (Milliseconds are optional.) Examples: 03:00:00
is every three hours, 00:00:00.1 is every 100 milliseconds.
• Date field: This field is used only with the Calendar Event type. Type a specific date using the MM/DD/YYYY
format, and when that Date and Time occurs, Expression is evaluated.
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