Can netxms tell : - 
Duration of node down / up status over a period of time, if so,
how ? 
example :
Down time of Node XX.XX.XX.XX 
Node IP         Node Name       Last Status       Down since 
XX.XX.XX.XX   XXXX               Node Down      4 hrs. 13 minutes
			
			
			
				 How to know node down time in Days Hours Minutes  ?