What exactly do the parameters in a DCS control system refer to?
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I have a simple question for the more experienced colleagues: What exactly do the parameters in a DCS control system refer to? Add new I/O point: RTD=1 ； AI=1 ； RAI (Redundancy) = 2 ； RAO (Redundancy) = 2 ； DI=10 ； DO=4.
RTD=1； ----------------------Thermal resistance input, point AI=1 ； -------------------------4 to 20 milliamps or 0 to 5 volts input; a little RAI (redundancy) = 2 ； ----------Redundancy: 4 to 20 milliamps or 0 to 5 volts input; two-point RAO (redundancy) = 2 ； --------4 to 20 mA output, two points, DI=10 ； ---------------------Digital (switching) input, 10 points DO=4 ； ----------------------Digital output four points
Generally, the parameters of a DCS system include: the issue of CPU redundancy, the configuration of various I/O points (including whether there is redundant I/O and the surplus of each type of I/O point), the number of PID control loops, the number of controllers, and the configuration of the operation stations, among others.
It also includes the size and quantity of power supplies, the model and type as well as the quantity of safety barriers, the model and quantity of communication modules, and so on – there are many factors to take into consideration.