PCC characteristics in the governor of the hottest

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PCC characteristics of hydraulic turbine governor

hydraulic turbine governor is an important control equipment to ensure the stable operation of hydropower station units, and its performance is directly related to the safe and stable operation of the whole system. The traditional IPC governor and PLC governor have their own advantages, but they also have defects. PCC programmable controller is a new generation of controller introduced by Austria begalay company in 1994. PCC integrates the advantages of PLC and IPC. Its intelligence, openness and group flexibility can make the complex control system perfect. The application of PCC in turbine governor can improve the intelligence of the control system, simplify its operation, and continuously expand and improve its functions. Therefore, it is necessary to study the PCC turbine governor

Programmable Controller PC includes programmable logic controller PLC and programmable computer controller PCC. As a new programmable controller, PCC has been recognized by more and more users because of its reliability, safety and flexibility. PCC has the following main features:

(1) compared with conventional PLC, the biggest feature of PCC lies in the design of time-sharing multitask operating system and diversified application software. It uses time-sharing multitask mechanism to build its application software running platform. The running cycle of the application program is independent of the length of the program, but determined by the cycle cycle of the operating system, It distinguishes the scanning cycle of application program from the external control cycle of Verizon, and meets the requirements of real-time control of Verizon. Based on such an operating system, the response of PCC shows that PTMC produces a surface corrosion degradation program in the body, which can be composed of multi task modules. These modules not only operate independently of each other, but also maintain a certain degree of correlation between data, which makes PCC have incomparable flexibility in application program design compared with conventional PLC

(2) PCC has the characteristics of flexible selection of different programming languages. Not only can the instruction table language on the conventional PLC continue to be used on PCC, but also the user can use the more efficient and intuitive high-level language (PL2000). It is a set of comprehensive control text language. The description of control requirements is very simple and intuitive. In addition, PCC application software development also has the ability to integrate "C" language programs

(3) PCC has unique characteristics in the structure of stool. In its core operation module, PCC provides its CPU with a large capacity storage unit (100k-16m) several times that of conventional PLC, which provides a hardware foundation for powerful system and application software. In addition, it has designed many special interface modules for various signals in the industrial field, such as high-frequency pulse, incremental pulse encoder, weighing signal and ultrasonic signal 1, narrow speed range interface u module, etc. The flexibility of PCC in remote communication is a great symbol different from conventional PLC

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