PLC Programmable Logic Controller features which

High reliability is the key to the performance of electrical control equipment. Plc logic controllers LSI due to the use of modern technology, strict production plc analog input output module process, the internal circuit to take the advanced anti-jamming technology with high reliability. For example, the production of F series Mitsubishi PLC MTBF of up to 300,000 hours. Some use redundant PLC CPU MTBF working time is longer. PLC of the machine outside the circuit, constitute a control system using PLC, and the same scale relay contactor systems, electrical wiring and switch contacts have been reduced to hundreds or even thousands of times, the fault will be greatly reduced. In addition, Plc logic Programmable Input Module controllers with hardware fault self-test function, failure to give timely warning information. In the application, the application are also incorporated into the self-diagnostic program peripheral devices, the system in addition to the PLC circuits and equipment also gained self-diagnostic protection. Thus, the entire system has high reliability is not surprising.

Plc high speed counting modules basics

Plc high speed counting modules: PLC English stands for Programmable Logic Controller, Chinese called the programmable logic controller, is defined as: an electronic digital computing plc programmable logic controller system operation, designed for use in industrial environments and design. It uses a programmable memory for storing its internal procedures, to perform logical, sequential control, timing, counting and arithmetic user-oriented operating instructions, and through digital or analog input / output control of all types of machinery or production processes. DCS Distributed Control System: DCS English name DISTRIBUTED CONTROL SYSTEM, Chinese called the Distributed Control System. DCS may be interpreted as the analog loop control more widely used in the industry, as the risk plc analog input output io module resulting from the decentralized control, and management of an automated high-tech products, and display the concentration. DCS generally consists of five parts: 1: Controller 2: I / O board 3: Operating Station 4: Communication Network 5: Graphics and pass away software.

PLC's domestic and international situation and future prospects

In the industrial production process, a lot of switching sequence control, which in accordance china programmable logic controller with the conditions of the order to move a logical and controlled chain protection action in accordance with the logic of relations, and a large number of discrete data collection. Traditionally, these functions are controlled by pneumatic or electrical system to achieve. 1968 American GM (General Motors) companies to replace the electrical Plc high speed counting modules control device, following the requirements of the second year, the United States Digital Equipment Corporation (DEC) developed a control device based on the integrated circuit and electronics technology, first applied to adopt procedural means electrical control, this is the first generation of programmable logic controller, called Programmable, is recognized as the world's first PLC.

History of PLC

In the industrial production process, a lot of switching sequence control, which in accordance with the Plc high speed counting modules conditions of the order to move a logical and controlled chain protection action in accordance with the logic of relations, and a large number of discrete data collection. Traditionally, these functions are controlled by pneumatic or electrical system to achieve. 1968 American GM (General Motors) companies to replace the electrical control device, following the requirements of the second year, the United States developed a programmable logical controllers digital control device company based integrated circuits and electronic technology, for the first time using procedural means used in electrical control, which is the first generation of high speed counter plc, said the Programmable Controller (PC). After a personal computer (referred to as PC) to develop, in order to facilitate, but also to reflect the high speed counter plc's features, programmable logic controller named Programmable Logic Controller (PLC), and now, still often referred PLC PC.