Process Control Communucation Protocols

How do instruments and controllers communicate in a process control? Has it ever came in your mind how instruments and controllers communicate? We know for a fact that communication may come wired or wireless but with the wast variety of process instruments nowadays how do this instruments work when connected to controllers of a different make. Communication protocols is what we call the digital message formats and rules required to exchange messages in or between computers and instruments. This is required in process automation.   The following are the different types of communication protocols, its uses and its makers in the field of […]

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What is a Final Control Element?

What is a Final Control Element? Final control element is a device controlled by a controller to change the operating conditions of a process. Final control elements requires energy to operate against the process. This energy is usually in the form of air pressure, hydraulic pressure or electricity. There are a great variety of final control elements and accessories that make each one have its own characteristics to adapt to a particular process dynamic What are the common final control elements? The most common final element is a control valve. Once a control valve is triggered it changes the process […]

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What is a Process Variable?

A process variable is the physical and chemical  properties of a process that is being controlled. common examples of PV or process variable are the temperature of a room, pressure and flow of fluid passing through a pipe, level of water in a tank and more.   These parameters are subject to changes depending on the requirements of the process. Click ( The Process Control Loop ) to understand more about the process variable and how it is controlled in a process control.

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The Process Control Loop

Hi, its me again and I am about to tackle a very important framework in the field of Instrumentation. Assuming you already have read my post regarding what a process control is and what are the parameters involved in this process. We are now going to learn how these parameters are meet in a process control loop. A Process control loop is a system that is designed to maintain a process on its desired set point. Each step in the loop works together to manage the system. Once the set point is reached, the process control loop operates in four steps. First, it will measure the current condition […]

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What is Process Control?

First we need to understand what process control is and what are the important technical terms and parameters involve in this process. Process control is a statistics and engineering discipline that deals with architectures, mechanisms and algorithms for maintaining the output of a specific process within a desired range as per wikipedia. Wiki sited an example about heating up of a room temperature which is a process that has the specific, desired outcome to reach and maintain a temperature (e.g. 20°C) defined by you or a person inside the room and should be kept constant over time. You can always […]

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