工业是国民经济的重要支柱,在工业自动化控制方面PLC的应用较为广泛,而且所发挥的作用也极大,它是种类繁多的自动化控制设备的基础,能够为它们提供可靠的控制应用解决方案,它不仅具有编程简单、组合灵活、维修方面等多种优点,能够满足自动化工业企业的需要,而且其成本较低,随着科技的不断发展其应用范围也逐渐扩大。 Industry is an important pillar of the national economy. In industrial automation and control, PLC is widely used and has a great role to play. It is the basis of a large variety of automation and control equipment, which can provide them with reliable control application solutions, It not only has the advantages of simple programming, flexible combination, maintenance and other advantages, which can meet the needs of automated industrial enterprises, but also its cost is low. As the continuous development of science and technology, its application scope is gradually expanded.