The ABB KUC711AE 3BHB004661R0001 is a controller module
The controller refers to the main command device that changes the wiring of the main circuit or control circuit and changes the resistance value in the circuit to control the start, speed regulation, braking and reverse of the motor in accordance with the predetermined sequence.
The controller is composed of program state register PSR, system state register SSR, program counter PC, instruction register, etc. As a “decision mechanism”, its main task is to issue commands and play a role in the coordination and command of the entire computer system operation. The classification of control mainly includes two kinds, namely, combinatorial logic controller and microprogram controller, both of which have their own advantages and disadvantages. The structure of combinatorial logic controller is relatively complex, but the advantage is that the speed is fast.
During the input sampling phase, the programmable logic controller successively reads all input states and data in a scanning manner and stores them in the corresponding cell in the I/O map area. After the end of the input sampling, the user program execution and output refresh phase. In both phases, even if the input state and data change, the state and data of the corresponding unit in the I/O map area will not change.
(1) High reliability. Because PLC mostly uses a single chip microcomputer, so the integration is high, coupled with the corresponding protection circuit and self-diagnosis function, improve the reliability of the system.
(2) Easy programming. PLC programming more use relay control ladder diagram and command statements, the number is much less than the microcomputer instructions, in addition to the medium and high PLC, the general small PLC only about 16.
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