描述
PLC和DCS这对工业控制上的搭档诞生的时间相差很短:Modicon于1968年开发出第一套PLC系统,当时主要用于汽车生产线上替代继电器达到控制的目的。而仅隔4年之后,Honeywell就研发出了第一套DCS系统。当然,不像PLC一出来就投身于环境恶劣的生产线上,DCS的待遇要明显比他“兄弟”好得多,不过在控制室中享受空调的它也明显比PLC要娇气的多
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