I need help from experts: how should the DCS and SIS systems be depicted in a process flow diagram?

2018-08-14View Original

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This post was last edited by ming*a122_AADQ on 2018-8-14 12:33. What are the differences between DCS and SIS in flow diagrams? For interlocks involving high/low levels, how many instruments should there be at the equipment outlets? I really don’t know how to draw it – digital signals are not used as wSIS inputs, and analog signals are not used as wSIS outputs. What do these two sentences mean? I’m new to this process and not sure. Is this okay for me?

Reply #22018-08-15

Take a look at the legend for SH/T 3101-2017 petrochemical process diagrams?

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I need help from experts: how should the DCS and SIS systems be depicted in a process flow diagram?

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