UAD155A0111 3BHE029110R0111 Distributed control system module

UAD155A0111 3BHE029110R0111 Distributed control system module
The three criteria of reliability design of distributed control system are the design that the system operation is not prone to failure, the design that the system operation is not affected by the fault, and the design that can quickly troubleshoot the fault.
The configuration of distributed control system includes system configuration, control configuration and picture configuration.
Functional modules can be classified into input and output functional modules, control algorithm functional modules, arithmetic functional modules, signal generator functional modules, conversion functional modules, signal selection and state functional modules, etc.
The trend screen includes real-time trend and historical trend.
Media access control refers to the control rules when nodes store information to or get information from communication media.
Shannon’s theorem states that the sampling frequency should not be less than twice the maximum frequency of the original system.
Software filtering adopts calculation method, commonly used software filtering includes first-order low-pass filtering, first-order high-pass filtering, recursive average (weighted) filtering, program discriminant filtering, etc.
When the ratio control is realized by the computer control device, the ratio coefficient of the instrument is not calculated, the conversion of the instrument coefficient is not carried out, and there are no problems such as K>1.
Compared with analog control algorithm, digital control algorithm can improve integral separation and weaken integral.
Sequential logic control system is divided into three kinds: time sequential control system, logical sequential control system and conditional sequential control system.