FOXBORO P0400HH REV L controller

Description

The definition of PLC is called a programmable controller. It follows mature and effective relay control concepts and design ideas, utilizes continuously developing new technologies and electronic devices, and gradually forms various series of products with unique characteristics. It is a specialized electronic computer for digital operation.

It is a device that stores control programs such as logical operations, sequential control, timing and counting, as well as arithmetic operations, in the form of a series of instructions in memory. Based on the stored control content, it controls production equipment and processes through analog, digital, and other input and output components. 2.2 Development History of PLC In 1969, DEC Company developed the world’s first PLC according to the requirements of General Motors Corporation (GM) and successfully applied it in GM. Afterwards, the company commercialized the PLC. PLC is specifically designed to compete with relay products and gradually replace traditional relays. As an industrial specialized computer, PLC has gone through the following development processes. 1969-1972 is the first stage of PLC, which is the initial stage of PLC. During this stage, the PLCs of various manufacturers have significant differences, no unified hardware and software standards, simple functions, and strong specificity. The hardware is mainly composed of separated components, with large volume, poor performance, and low reliability.

1972- was the second stage, during which PLC gradually evolved into a specialized industrial computer, greatly improving reliability and reducing costs. Process oriented ladder diagrams and statement table languages were introduced, and the system gradually transitioned towards standardization, laying the foundation for the popularization of PLC. Since 1981, the iec has officially published the standards for plc, and the PLCs of various manufacturers are developing towards standardization. Ladder diagrams, statement tables, and SFC languages have matured, and there are interfaces with advanced programming languages.

Their storage capacity, computational speed, and processing capabilities for analog quantities have been greatly enhanced. Nowadays, large and medium-sized PLCs have classic pid algorithms, slope functions, adaptive algorithms, fuzzy control algorithms, and other algorithms that were previously unique to DCS. 2.3 Features and Functions of PLC (1) Main Features of PLC. The characteristics of PLC are: reliable operation, fast running speed, modular structure, flexible combination, good compatibility, simple and rich programming and generation, and strong network functions. (2) The main functions of PLC. The PLC system can effectively perform industrial real-time sequential control, condition control, counting control, step control, and other functions; Capable of completing analog to digital (a/d), digital to analog (d/a) conversion, data processing, communication networking, real-time monitoring and other functions. Years of practice have shown that PLCs are durable and reliable, designed specifically for factories.

They have reinforced components according to the requirements of the working environment, real-time scanning practice, and fault diagnosis functions, making troubleshooting simple and highly favored by users. The reason why PLC is so reliable is a real-time core or operating system that can execute relay logic, sequential function diagrams, function blocks, structural text, command directories, or a combination of them. If a malfunction occurs, its built-in safety device can maintain mechanical damage and maintain an orderly and predictable sequence. The development trend of 2.4 PLC has extremely fast logic operation and strong logic control and sequence control capabilities, unparalleled reliability in discrete control, and convenient and easy to learn programming methods, making it an undisputed leader in the field of industrial automation mainly based on discrete control.

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3BHB030310R0001
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3BHB021400R0002
5SHY4045L0004GVC736
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3BHB018162R0001
5SHY4045L0001
5SXE10-0181
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