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["O PLC pode substituir o sistema SIS?", "Se não, que

2020-05-16View Original

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Reply #22020-05-17
Continue from where you left off.
Reply #32020-05-17
PLC怎么能代替SIS呢? 这么讲的话,大型工厂 DCS可以一统天下了! 那是不可能的,概念不同!
Reply #42020-05-17
我的理解,sis可以用PLC和DCS两种系统来实现,只是权限和触发后状态不一样。
Reply #52020-05-17
SIS系统 仪表阀门是有SL等级的。
Reply #62020-05-17
专家说SIS DCS 要单独独立,甚至是需要独立的UPS,怎么可能用PLC和DCS来控制呢。也许可以达到同样的效果,但是规范不允许。
Reply #72020-05-19
没有标准。 SIS 控制系统= 安全功能+ PLC。 有安全功能(或者说安全证书的PLC),被认为是SIS 控制系统。 不必纠结于定义。

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