Hi Ines,
The 'Always' trigger mode does not evaluate the Trigger Expression. With the Always trigger, when ANY of the subscribed tags changes value. those tags and values are sent to the destination.
Use a 'While True' trigger and express the trigger so that it generates a trigger event based on the new value:
if the STATUS tag is always going to be >0, use 'STATUS' >0
if the STATUS tag can have 0 as a valid trigger, then use ('STATUS' .0) || ('STATUS'==0)
When the trigger fires, the most current value of the tags defined in the Output of the notification will all be sent to the destination.
The difference between the On xxx and While xxx triggers are that an On xxx trigger is an edge trigger, the trigger expression must be evaluated as the complement of the trigger before it will be evalulated again ( True->trigger, False->no trigger, True->trigger). A While xxxx trigger fires every time the expression value matches the While state (true for While True, false for While False)
Please refer to the Application Help at help.sap.com/pco, in the Notification ->Notification: Trigger Tab for more details.
Regards, Steve