dio_default_ftd

	status.i4.v = dio_default_ftd(device_indices.i4a.r, properties.i2a.r,
				      ftds.i2a.r, errors.i2a.r
				      [,num_devices.i4.r])

	This routine returns the default Frequency Time Descriptor (FTD) for
	a device and property (DI/PI).  If "num_devices" is specified, default
	FTDs for a list of devices/properties can be retrieved.

	device_indices	device index or array of device indices
	properties	property index or array of indices
			(If the first value is less than zero, all devices
			 will be requested with a property index which is
			 equal to the absolute value of this argument.)
			(constants are in 'dbprops')
	ftds		returned default FTD or array of default FTDs
			(FTD_ONESHOT -> one shot,
			 FTD_1HZ -> 1 Hz request,
			 FTD_EVENT_MASK OR'ed with TCLK event value -> read
			 on TCLK event (event constants are in 'tclk_events'),
			 otherwise -> retrieval frequency in 60 Hz ticks)
			(A value of NULL can be passed for this argument if
			 only caching of the FTD information is desired.)
	errors		returned ACNET status value or array of status values
	[num_devices]	number of devices (default is 1)

	This function returns status values as follows:

	OK			success
	DIO_BADARG		invalid number of devices passed
	DIO_MEMFAIL		memory allocation failure
	negative value		ACNET format error indicating overall failure
	positive value		number of devices in error indicating partial
				success

	This function requires the following include files:

	dbprops_h, diolib_h, acnet_errors_h

	Related functions:

	dio_default_data_event_c, dio_get_raw(_c), dio_get_dev(_c),
	dio_dpreq_info, dio_cache_property_info_c, error_in_list(_c),
	dio_enable_obsolete_dev_info, dio_disable_obsolete_dev_info

	C/C++ usage:

	short	ftds[NUM_DEVICES];
	short	errors[NUM_DEVICES];
	short	properties = -PRREAD;
	int	status;
	static const int	device_indices[NUM_DEVICES] = {14430, 14431};
	int	num_devices = NUM_DEVICES;

	status = dio_default_ftd(device_indices,&properties,ftds,
				 errors,&num_devices);