Configure an external detector

An external detector is triggered using the AVEVA Historian ActiveEvent control. The detector is a COM component and has an external interface. An InTouch or Visual Basic script can trigger a Historian event by using the ActiveEvent methods, which are similar to functions. Using the InvokeEventEx() method causes an external event to be detected within the Event subsystem.

After you select "External" as your detector type, you need to configure the security attributes for the ActiveEvent control and write the script that invokes the event. For more information, see Use ActiveEvent.