The PID module of the DCS system?
Thread Content
This post was last edited by marry on 2015-11-23 11:05. 1. Are the formulas for the PID modules used in different DCS systems the same? Or does each company have its own improvements? Even if the formula is written differently, is the algorithm the same? In other words, is it actually the same thing, or is it just a difference in the way of expressing it? Is the PID in DCS called a digital PID? There are position PID, incremental PID, incomplete differential PID, and so on. Which type of PID does each DCS use? 2. Can the PID module in DCS achieve self-tuning functionality? So we don’t need to enter specific P, I, D values, and the system will adjust automatically? Is this feature available in every DCS, or is it an additional feature that requires separate hardware or software purchase? 3. In the DCS, P in the PID module refers to the proportional gain, where P = 1/K. Do DCS manufacturers generally ask for P or K? Because it was found that DCS systems from different manufacturers vary; some use P, while others use K.
1. The formulas for the PID modules used in different DCS systems are basically the same; there may be certain differences, but the control results remain identical. 2. It has a self-tuning function, but it is practically useless in real applications. 3. In the DCS, the P in the PID module refers to the proportional coefficient, and the relationship between this proportional coefficient and the proportional gain is an inverse one.
The basic algorithm should be the same, but the specific parameters differ greatly; in other words, some of them have many leading angles and thus possess strong functionality. Different versions of the Siemens system are constantly being improved. Adaptive? I’ve never used it; I don’t dare to use it.