Command USVUpdate :

Shutdown the system in if the second argument is 1.
Third argument is the time to shutdown.
If first argument is 1 info is printed out.

USVUpdate Definition
Input Argument	Tango::DEVVAR_LONGARRAY	Show flag, shutdown flag, time to shutdown
Output Argument	Tango::DEV_VOID
DisplayLevel	OPERATOR	..
Inherited	false	..
Abstract	false	..
Polling Period	Not polled	..
Command allowed for	All states	..