Indicates the current alarm state only for system level. This object will be : - critical(7): when there is at least one active (ON) critical alarm . - major (3): when there is no active critical alarm, but there is at least one active (ON) major alarm . - minor (4): when there is no active major or critical alarm, but there is at least one active minor alarm. - warning (6): when there is no active major, critical or minor alarm, but there is at least one active warning alarm. - event (5): when there is no active alarm of another type, but there is at least one active event alarm. - off(2): when there is no active (ON) alarm (since last clear operation).