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由于可编程控制器(简称PLC)可靠性高(平均无故障时间可达8万～10万小时)、编程简单、通用性强、体积小、结构紧凑、安装维护方便,因此大量应用于机械、冶金、石油、化工、轻工、纺织、电力、电子、食品、交通、楼宇等行业。实践表明,80%以上的工业控制可以使用PLC来完成。目前高级电工的培训内容中,PLC也是重要的一部分。通过可编程控制器应用系列学习,可使自己的PLC水平提高到一定的层次。大家在开始学习时,不一定要完全搞清楚程序,在学习的过程中,会慢慢了解其控制思维及方法。知识点:由基本的PLC指令产生较复杂逻辑关系的编程以及生产脉冲信号的方法等。技能点:PLC接线、防盗控制箱的制作。难点:复杂逻辑关系的编程。注意要点:必须具有电工安全基本知识,PLC接线时必须断电。必要条件:电脑、可编程控制器、编程电缆。
Due to the high reliability of programmable logic controller (referred to as PLC) (MTBF up to 80,000 ~ 100,000 hours), programming is simple, versatility, small size, compact structure, easy installation and maintenance, so a large number of applications in machinery, Metallurgy, petroleum, chemical, light industry, textile, electric power, electronics, food, transportation, building and other industries. Practice shows that more than 80% of industrial control can be done using PLC. The current senior electrician training content, PLC is also an important part. Through the application of programmable controller learning series, can make their own PLC level to a certain level. When you begin to study, you do not have to completely understand the procedure. During your study, you will gradually understand its control thinking and methods. Knowledge point: the basic PLC instructions to generate more complex logic programming and the production of pulse signal method. Skills points: PLC wiring, security control box production. Difficulties: complex logic programming. Note points: you must have the basic knowledge of electrical safety, PLC wiring must be powered off. Necessary conditions: computer, programmable logic controller, programming cable.