描述
3类FCS的典型
1）连续的工艺过程自动控制如石油化工，其中“本安防爆”技术是绝对重要的，典型产品是FF、World FIP、Profibus—PA；
2）分立的工艺动作自动控制如汽车制造机器人、汽车，典型产品是Profibus—DP、CANbus；
3）多点控制如楼宇自动化，典型产品是LON Work、Profibus—FMS。
从上述基本要点的描述中，我们是否注意到一点，用于过程控制的三大系统，没有一个是针对电站而开发的，或者说，在他们开发的初期，都并非以电站做系统的首选控制对象。而在这些系统的使用说明中也绝不把电站做为首选适用范围，有的在适用范围中根本就不提电站。现在奇怪的是，这三大控制系统，尤其是DCS、PLC，都在电站得到了广泛应用，而且效果也非常好。
3．三大控制系统之间的差异
我们已经知道，FCS是由DCS与PLC发展而来，FCS不仅具备DCS与PLC的特点，而且跨出了革命性的一步。而目前，新型的DCS与新型的PLC，都有向对方*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*。下一节就仅以DCS与FCS进行比较。在前面的章节中，实际上已涉及到DCS与FCS的差异，下面将就体系结构、投资、设计、使用等方面进行叙述。
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FANUC PC BOARD A20B-2900-0480 A20B29000480
Superior Elec. Slo-Syn Power Supply MPS-3000A MPS3000A
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Tailstock Turret Attachment Hardinge Super Slant III
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Kearney Trecker Feedback Subsystem 1-20662-01 REV 13
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