sts.i4.v = seqdat_read(read_what.i4.v, value.g.r)

	Return data set by the SEQUENCER/C49.  
	For time data:  units are in hours, 0 returned for invalid data.
   	Previous call to seqdat_set_mode required.  Arguments are as follows.
	read_what	see auxlib include file for defined constants
			that specify the value to be read

	value		returned data

	Returns 0 for success, else a nonzero error code.