Direct Digital Control at Lone Star's Greencastle, Indiana, Plant

In deciding to replace the existing plant facilities at Greencastle, Ind., Lone Star Cement Corporation's management was determined to take advantage of all the modern control techniques available in designing a four-million barrels per year facility which would produce a high level of reliable and profitable chemical quality control with dynamic regulation of the process at minimum operating cost. With these objectives in mind, all efforts were directed toward development of the centralized computer control system discussed.