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What are the key criteria for selecting a process control system architecture and platform?

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Process control is the use of sensors, actuators, and algorithms to monitor and manipulate the variables of a physical or chemical process, such as temperature, pressure, flow, or concentration. A process control system consists of the hardware and software components that enable the communication, computation, and control functions of the system. Choosing the right architecture and platform for your process control system is crucial for achieving optimal performance, reliability, and scalability. In this article, we will discuss some of the key criteria that you should consider when selecting a process control system architecture and platform.

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Jose Carlos Villajulca

Especialista en Ejecucion y Gestion de Proyectos de Automatizacion Industrial. Fundador y Consultor en…

1 Process requirements

The first step in selecting a process control system architecture and platform is to define your process requirements, such as the number and type of sensors and actuators, the desired control objectives and strategies, the data acquisition and analysis needs, and the safety and security standards. These requirements will determine the level of complexity, functionality, and robustness that your process control system should have. For example, if you have a large-scale and dynamic process with multiple inputs and outputs, you may need a distributed control system (DCS) that can handle high data rates, advanced control algorithms, and fault tolerance. On the other hand, if you have a small-scale and stable process with few inputs and outputs, you may opt for a simpler and cheaper programmable logic controller (PLC) that can execute basic control loops and logic operations.

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Jose Carlos Villajulca

Especialista en Ejecucion y Gestion de Proyectos de Automatizacion Industrial. Fundador y Consultor en InstrumentacionyControl.NET & MyAutomationClass.com
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Un punto importante es conocer la necesidad de disponibilidad del sistema. Dependiendo del proceso, sera necesario invertir en redundancia desde los controladores incluso hasta los buses de campo e instrumentos. Dise?ar una arquitectura escalable es sumamente importante para minimizar costos y tiempos cuando se requiera realizar ampliaciones.

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2 System architecture

The system architecture refers to the way the hardware and software components of the process control system are organized and connected. There are different types of system architectures, such as centralized, decentralized, hierarchical, modular, or hybrid. Each type has its own advantages and disadvantages in terms of performance, flexibility, scalability, and cost. For example, a centralized architecture has a single controller that performs all the control functions and communicates with all the sensors and actuators. This architecture is simple and easy to maintain, but it may suffer from communication delays, data overload, and single point of failure. A decentralized architecture has multiple controllers that operate independently and communicate with each other only when necessary. This architecture is more robust and scalable, but it may require more coordination and synchronization among the controllers.

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Jose Carlos Villajulca

Especialista en Ejecucion y Gestion de Proyectos de Automatizacion Industrial. Fundador y Consultor en InstrumentacionyControl.NET & MyAutomationClass.com
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En mi experiencia, es preferible invertir en una arquitectura escalable al inicio para luego facilitar grandemente las amplicaciones y reducir costos asociados. Esto toma mas relevancia si la disponibilidad requerida es muy alta,

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3 System platform

The system platform refers to the hardware and software specifications of the process control system, such as the processor type, memory size, operating system, programming language, communication protocol, and user interface. The system platform should be compatible with your process requirements, system architecture, and existing infrastructure. For example, if you need to implement complex and nonlinear control algorithms, you may need a powerful processor with high memory capacity and a flexible programming language. If you need to integrate your process control system with other systems or devices, you may need a standard and reliable communication protocol and a user-friendly interface.

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4 Vendor support

Another important criterion for selecting a process control system architecture and platform is the vendor support. The vendor support refers to the quality and availability of the technical assistance, maintenance, training, and updates that the vendor provides for the process control system. The vendor support can affect the reliability, efficiency, and longevity of your process control system. For example, if you encounter any problems or issues with your process control system, you may need a vendor that can offer timely and effective solutions. If you want to upgrade or expand your process control system, you may need a vendor that can provide compatible and up-to-date products and services.

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5 Cost-benefit analysis

The final criterion for selecting a process control system architecture and platform is the cost-benefit analysis. The cost-benefit analysis refers to the evaluation of the trade-offs between the initial and operational costs of the process control system and the expected benefits and savings that the process control system can bring. The cost-benefit analysis can help you justify your investment and optimize your budget. For example, if you have a high-performance and low-maintenance process control system that can reduce your energy consumption, improve your product quality, and increase your profitability, you may be willing to pay a higher upfront cost. On the other hand, if you have a low-performance and high-maintenance process control system that can cause frequent breakdowns, waste your resources, and lower your customer satisfaction, you may regret your purchase.

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What are the key criteria for selecting a process control system architecture and platform?

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1 Process requirements

2 System architecture

3 System platform

4 Vendor support

5 Cost-benefit analysis

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