Some questions about programmable valves
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Please help me figure out this issue. When the programmable valve malfunctions, there are 2-3 small red dots below it, located in the left, center, and right positions. What do these red dots represent?
OP, post the previous picture so everyone can analyze it for you
Whose programmable valve is it, and where on the valve is the red dot? Is it the red dot below the programmable valve on the DCS screen?
It should be the red dot below the programmable valve on the DCS screen
It’s the red circle that appears on the DCS diagram.
The labels that appear on the diagram depend on how they were initially configured and defined. You can ask the person who configured it; ordinary operators also know what color a certain point represents.
Generally, it has several meanings: on state, off state, intermediate state, fault state, locked state, etc.
By LZ, they mean state feedback; generally, there is feedback on the two valve bodies in the form of on/off signals
It should be a programmable DCS screen; it might show the signals indicating whether the solenoid valve is powered or not, as well as the valve position signal.