dio_scaling_len(_c)

	status.i4.v = dio_scaling_len(device_index.i4.r, property.i2.r
				      [,options.u4.r])

	status.i4.v = dio_scaling_len_c(device_index.i4.v, property.i2.v
					[,options.u4.v])

	This routine returns a device's default input length for scaling
	services.
	
	device_index	device index
	property	property index
			(PRREAD -> reading property,
			 PRSET -> setting property,
			 PRBSTS -> basic status property,
			 PRBCTL -> basic control property,
			 PRDCTL -> digital control property)
	[options]	retrieval options
			(DIO_OPT_NONE -> no options selected (default),
			 DIO_OPT_ALLOW_OBSOLETE -> return data for obsolete
						   devices)

	This function returns status values as follows:

	DIO_BADARG		invalid property index passed
	0			undefined byte length
	1, 2, or 4		the three possible valid byte lengths

	This function requires the following include files:

	dbprops_h, diolib_h, acnet_errors_h

	Related functions:

	dio_scaling_length_list_c, dio_status_scaling_length_c,
	dio_control_scaling_length_c, dio_is_display_dec(_c),
	dio_is_display_short(_c), dio_scaling, dio_is_string_property_c,
	dio_is_enumerated_property_c, dio_is_primary_scalable_property_c,
	dio_is_controlled_set_list, dio_data_type_info_c

	C/C++ usage:

	short	property = PRSET;
	int	status;
	int	device_index = 14430;
	unsigned int	options = DIO_OPT_NONE;

	status = dio_scaling_len_c(device_index,property,options);