Command SetStepAmplitude :

Sets step amplitude for open-loop movements.
Value range: 1 - 65535
65535 corresponds to 100V

SetStepAmplitude Definition
Input Argument	Tango::DEVVAR_LONGARRAY	0: axis number 1: step amplitude
Output Argument	Tango::DEV_VOID
DisplayLevel	OPERATOR	..
Inherited	false	..
Abstract	false	..
Polling Period	Not polled	..
Command NOT allowed for	FAULT OFF	..