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FCS is developed from DCS and PLC.It not only has the characteristics of DCS and PLC,but also takes a revolutionary step.At present,the new DCS and the new PLC have a tendency to move closer to each other.The new DCS has a strong sequential control function;and the new PLC is not bad in handling closed-loop control,and both can form a large network.The scope of application of DCS and PLC has been greatly crossed.

FCS是由DCS与PLC发展而来，不仅具备DCS与PLC的特点，而且跨出了革命性的一步。目前新型的DCS与新型的PLC，都有向对方靠拢的趋势。新型的DCS已有很强的顺序控制功能;而新型的PLC，在处理闭环控制方面也不差，并且两者都能组成大型网络，DCS与PLC的适用范围，已有很大的交叉。