we have to solve the following problem : we should detect any change in a value within a non-determined period.
To give you more infos, we have some lab results (mainly Analog ones) which are raising in a event-driven mode, and we wanna notify people when these values are changing.
Right now, we are using the "HasChanged" function from PE in the trigger formula. We have a parameter for the observation delay of the HasChanged function, but we thought there are smarter solutions in order to save CPU activity.
That's my the question may be summarized by : On a Value change, do we have any boolean attribute related to the AF Attribute or the PI Point we can trigger on?