GE V7768-322001 CPU板
PLC adopts modern large-scale integrated circuit technology, adopts strict manufacturing process, and adopts * * * anti-interference technology for internal circuit, which has high reliability. Using PLC to constitute the control system, compared with the relay contactor system of the same scale, the electrical wiring and switch contacts have been reduced to hundreds or even thousands of times, and the failure has been greatly reduced. In addition, PLC has hardware fault self-diagnosis function, which can send out alarm information in time in case of fault. In the application software, the application can also program the fault self-diagnosis program of peripheral devices, so that the circuit and equipment in the system other than PLC can also obtain fault self-diagnosis protection. In this way, the whole system will be highly reliable. Today, PLC has developed into a series of products of various scales, which can be used in various industrial control occasions. In addition to the logic processing function, most of the PLCs have perfect data processing capabilities, which can be used in various digital control fields. A variety of functional units have emerged in large numbers, making PLC penetrate into various industrial controls such as position control, temperature control, CNC, etc. With the enhancement of PLC communication capability and the development of human-computer interface technology, it is very easy to use PLC to compose various control systems.
PLC is a kind of equipment used for automatic control of industrial production. Generally speaking, it can be used directly in industrial environment without any measures. However, despite the above high reliability and strong anti-interference ability, when the production environment is too bad, the electromagnetic interference is particularly strong, or the installation and use is inappropriate, it may lead to program error or operation error, resulting in incorrect input and output, resulting in equipment out of control and misoperation, to ensure the normal operation of PLC. In order to improve the reliability of the PLC control system, on the one hand, the PLC manufacturer is required to improve the anti-interference ability of the equipment; On the other hand, we need to attach great importance to design, installation, use and maintenance. Multi-party cooperation can improve the problem-solving ability and effectively improve the anti-interference performance of the system.
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