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Process control systems for Hydrocarbon Process Automation Applications (HPAA) are implemented in oil and gas fields, plants, refineries, and tank farms in the form of a Local Area Network (LAN) to support control functions. These systems are composed of sensors, actuators, and logic solvers networked together to form a control system platform. Reliable networking plays a key role in supporting such a system infrastructure. The existing network designs consist of multiple, parallel networks with limited interconnectivity supporting different functions. The concept of consolidating HPPA networks on a converged Internet Protocol (IP) and utilize Wide Area Network (WAN) for real time operation was not explored in detail in the past.
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