What is the difference between series operation and automatic operation in DCS?
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This post was last edited by sunjl1981 on 2013-1-6 22:36. What is the difference between series operation and automatic operation in DCS? For example: the flow rate of alkali entering the electrolyzer is controlled in series, and the frequency-controlled pump also operates in series! ， ， -
Cascade refers to a mathematical relationship existing between one circuit and another, whereas automatic control involves the automatic adjustment of a single circuit on its own.
Cascade refers to a mathematical relationship existing between one circuit and another, whereas automatic control involves the automatic adjustment of a single circuit on its own.
Automatic means you set it to a fixed value. Cascade is based on the values changed by other variables. For example: if you set the flow rate of alkali entering the tank to 21.6 m3/h, the program will automatically control the alkali flow rate to remain within a certain range around 21.6 m3/h. This is automatic. The pressure difference between hydrogen and chlorine is controlled at 4 kPa; the hydrogen pressure changes in response to the chlorine pressure, and the control of the hydrogen pressure is achieved through cascade control.
Cascade control refers to automatic regulation achieved by using the value obtained from the calculation in one loop as the setpoint for another loop. The set value for a single automatic circuit can be entered manually directly.
Automatic control is based on a fixed value, while cascade control is based on a variable