Command MoveDownwards :

Move downwards the number of steps given in argument, or continuously if argument is -1.

MoveDownwards Definition
Input Argument	Tango::DEV_DOUBLE	Number of steps or -1 for continuous movement.
Output Argument	Tango::DEV_VOID
DisplayLevel	OPERATOR	..
Inherited	false	..
Abstract	false	..
Polling Period	Not polled	..
Command allowed for	All states	..