Object Oriented Programming in Control System Software EngineeringWhile esoteric in its infancy, Object Oriented Programming (OOP) crept into mainstream Information Technology (IT) applications by the mid 1980's. A decade later, OOP permeated Control System Software Engineering applications with many commercially available libraries and applications. The very popular incarnation of these object-based process control applications comes in the form of OPC client/server technology. These applications use OPC as the standards-based communication mechanism. OOP methodologies played a key role in the rapid adoption of the OPC technology. With widespread adoption, OPC facilitates the abstraction of control systems components such as DCSs (Honeywell, Emerson, Yokogawa, etc), PLCs (Rockwell, Siemens, Triconex, etc), process historians (AspenTech, Microsoft, OSI, etc), and many others.
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