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2020-11-14View Original

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Reply #22020-11-15
继续翻译
Reply #32020-11-16
关于DCS是否可以发送信号至SIS
Reply #42020-11-16
*. 请教各路大侠,DCS可以发送干接点DO信号至SIS吗?例如:DCS控制的一台气动开关阀-进水阀,SIS控制的一台紧急切断阀-进料阀。正常情况下进水阀处于关闭状态,进料阀处于打开状态,一旦发生危险,就要在DCS打开进水阀,打开的同时DCS发信号至SIS,SIS联锁关闭进料阀。请问这样可行吗?如不可行该怎么做?
Reply #52020-11-16
应该是不可以,如果真的涉及安全,那就要全部做进SIS里边
Reply #62020-11-18
操作上可以,实际上不允许。SIS系统要专门配置仪表。之所以要设置SIS系统就是为了保证系统安全。如果两个系统用统一仪表,当DCS仪表失效,控制阀和切断阀同时失效就危险啦。所以您都舍得加一个切断阀,却不舍得增加一个仪表就是因小失大啦。
Reply #72020-11-19
你说的这个是操作是可以的,但sis逻辑反了。
Reply #82020-11-19
SIS系统不应介入或取代过程控制(DCS)系统,应始终独立于过程控制系统。

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