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近些年，因为全世界的加工型产业向中国的转移，使中国成为了全世界的加工基地，巨大的需求带动了中国的装备制造业蓬勃发展，从而带动了中国控制技术的飞速发展。
信息时代装备制造的核心是什么？是自动化、信息化，而PLC则是整个装备自动化和信息化的核心部件。一个没有强大自动化产业做支持的制造大国是不可能长久的，低成本的人工是不可能长久的，只有通过加强自动化程度，加强信息化程度，我们才有可能进一步的降低成本提提升附加值，成为一个名符其实的制造强国。
所以历史赋予了我们一个很重要的使命，通过加强装备控制的水平来提升中国造的国际竞争力。
1.2、PLC定义与选取：
PLCOPEN将PLC定义为：具有编程能力的固态控制系统
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