Experience and knowledge in DCS configuration
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I’m not familiar with DCS configuration and would like to learn about it. Those of you who have experience – could you please provide some guidance? This post was last edited by DAC The army rules the world on 2009-3-29 at 17:29.]
The 1st configuration screen is drawn according to the process flow diagram, including various devices and machines shown in the diagram, as well as various control points such as pressure, temperature, flow rate, vibration, and shaft displacement; it also includes various pipelines； The two configuration screens cannot be fully displayed on a single diagram; the screens can be divided into several sub-diagrams according to the system, with each sub-diagram representing one of them ； The 3 configuration screens should be equipped with a quick screen switching toolbar ； The 4 configuration screens should be equipped with operation screens such as various valve status selection auxiliary screens, system interlock auxiliary screens, historical trend screens for each control point, and system control point alarm screens ； The 5 configuration screens also include the system logic control screen ； For the 6 configuration screens, it is necessary to select the appropriate color for the materials based on their properties. Attention should also be paid to the choice of background colors; colors that are too harsh on the eyes should not be used, as this can cause visual fatigue in operators over time and harm their eyesight ；
The number of sub-diagrams per set should not be too large, otherwise the operator will have to flip pages too frequently; however, there should also not be too many programming points on each diagram
In my understanding, it refers to the configuration of I/O points; essentially, it involves combining the process control variables CV and MV, and sometimes also the disturbance variables DV in advanced control systems, according to an optimal control strategy, with the operation being carried out through a DCS system. Taking the operation at the top of a distillation tower as an example: Is the draw-off from the top of the tower controlled by the temperature at that point or by the liquid level in the reflux tank? Is the reflux rate controlled by the temperature at the top of the tower or by the liquid level in the reflux tank? How are these four control variables combined? Different design firms have different approaches, which results in varying configurations
:P :P :o :o
It requires cooperation between process technicians and DCS engineers to optimize the display screens, mainly to facilitate future operations and prevent mistakes
The image is formed by the combination of processes, while the logic is handled by the instruments; the processes work in coordination
You can go to the manufacturer for training; otherwise, it’s impossible to explain everything at once
Coordination between process technicians and DCS engineers is required, as well as the involvement of front-line operators to ensure smooth operation and adjustment.