Use events

An event is an action that is triggered by the evaluation of the expression associated with it. The action can be any

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command or macro. When the expression changes from False on the previous evaluation to True on the current evaluation, the action is triggered. An expression can be a tag name or it can be an equation made up of tag names, mathematical and logical operations, special functions, and If-Then-Else logic.

An events file consists of a number of events and a maximum update rate for them. At runtime, multiple events files can be active at once. You can run a maximum of 20 events files at one time, each containing up to 1000 events.