现货FBM220福克斯波罗

现货FBM220福克斯波罗
DCS体系是继PLC之外的一大自动化操控体系，它在化工、火电等领域的使用较为广泛，但是生产方面的自动化技能需求进一步提高，传统的DCS体系已不能满足需要，需要进行技能升级。

DCS体系由多台计算机分别操控生产过程中多个操控回路，同时又可会集获取数据、会集管理和会集操控的自动操控体系。分布式操控体系选用微处理机分别操控各个回路，而用中小型工业操控计算机或高性能的微处理机施行上一级的操控。

经过这些年来的不断使用，DCS体系在行业开展的一些局限性逐步体现出来，DCS存在的问题：

(1)1对1结构。1台外表，1对传输线，单向传输1个信号。这种结构形成接线庞杂、工程周期长、安装费用高、维护困难。

(2)可靠性差。模仿信号传输不仅精确度低，且易受搅扰。为此选用各种办法提高抗搅扰性和传输精确度，其结果是增加了本钱。

(3)失控状况。操作员在操控室既不了解现场模仿外表的工作状况，也不能对其进行参数调整，更不能预测事端，导致操作员对其处于失控状况。因操作员不能及时发现现场外表故障，而发作事端已屡见不鲜。

(4)互操作性差。尽管模仿外表已一致4～20mA信号规范，可大部分技能参数仍由制造商自定，致使不同品牌外表无法互换。因而导致用户依靠制造厂，无法使用性能价格比较优的配套外表，乃至出现单个制造商垄断市场的局势。
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