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工作方式中断方式，程序等待条件满足扫描方式，条件不满足程序继续执行
编程语言汇编语言、编程语言标准编程语言
工作环境要求较高对环境要求不高，适应工业现场环境要求
使用者技能要求需专门培训编程语言容易掌握，且有多种编程语言
系统软件功能强，且占用存储空间大功能**，占用存储空间小
适应领域家庭、办公室、管理层、科学计算专门用于工业过程控制
价格高较低
PLC控制系统与分散控制系统的比较：
分散控制系统是专门为工业过程控制设计的过程仪表控制系统，也称为集散控制系统。按照可编程控制器的发展历程和DCS发展历程的分析，分散控制系统的主要应用场合是连续量的模拟控制，而可编程控制器的主要场合是开关量的逻辑控制。因此在设计思想上有一定的区别。
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