14collaboration with our customers, including major global companies, we have succeeded in producing and refining technologies that other companies cannot easily imitate.Other technical advantages of all Yokogawa measurement and control products that have earned us worldwide recognition are long-term stability, high reliability, and environmental resistance. While our custmers expect our sensors and control systems to be highly accurate, they must also be capable of operating without interruption in challenging environments, such as an outdoors location where temperatures vary considerably or in a factory where Yokogawa has achieved 99.99999% availability ([1-duration of breakdown/duration of operation] x 100).Yokogawa has quickly sought to develop standards based on these technologies. The company has actively engaged in developing new and highly reliable communications technologies such as FOUNDATION™ fieldbus and ISA100 Wireless, and has sought to promote the development of related international standards and improve compatibility between production control systems and the enterprise resource planning (ERP) and other types of systems that act as the brain for businesses. Speaking of stability, another of Yokogawa’s strengths is product continuity. Since the 1990s, there have been numerous mergers and acquisitions of companies in the measurement and control field. Leading global companies have been particularly active on this front, expanding and strengthening their businesses by purchasing other market players. Numerous changes to software and other kinds of products have been made as a result, and this has led to difficulties for users in obtaining necessary parts for the upgrade or repair of equipment. In contrast, Yokogawa has always sought when offering new measurement and control products and systems to maintain backwards compatibility with existing products. Also with CENTUM, CENTUM: Non-stop performance that always adds value1975 release of CENTUM, the world’s first distributed control systemThe Value of Non-stop Performanceinstruments are subject to vibrations. In other words, they must be both incredibly sensitive and tough. DPharp transmitters accomplish this by having silicon resonant sensors that are vacuum-enclosed and highly stable.These factors are even more important for the CENTUM integrated production control system, Yokogawa’s flagship product. The CENTUM control system connects countless sensors that are located throughout a plant, using the data obtained to automatically control the plant’s operations. It is absolutely essential for a system like CENTUM to remain operational at all times. Since releasing CENTUM in 1975, we have continually upgraded its capabilities by, for example, introducing the use of dual redundant processor and main memory modules. CENTUM CS, released in 1992, features a pair of micro-processor units (MPUs) in each processor module that perform the same computations and continuously check for transient errors. For advanced stability, it employs Pair & Spare, a superb method that achieves high reliability by automatically switching control to a standby processor module in the event of a system failure. Through such advances, Globally Recognized Technology and QualityYokogawa’s Strengths
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