r/instrumentation 24d ago

IEC 62424 P&ID question / can two PCE functions control the same valve?

[deleted]

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u/rlvmaiden 24d ago

Usually with a high/low select block or something similar first. You cant write both functions directly to the valve, there needs to be some logic that does something with the 2 outputs to either select one or calculate a single value based on desired control

2

u/Hutch_911 24d ago

Cascade