How to determine the instrument interlock wiring for PID diagrams
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I would like to ask the experts: how is the interlock wiring pattern for PID control instruments determined? What determines things such as electrical signal lines and pneumatic signal lines?
They all have fixed usage methods; you’ll understand it pretty well by looking at the PID diagram
What signal is the instrument interlock? Can’t be sure? ?
If you are not from the instrumentation field and not familiar with this area, it will be difficult to understand; you can take a look at various instrumentation samples and valve samples
GB/T 2625-1981 \"Graphic symbols and textual codes for process monitoring and control flowcharts\"; HG/T 20505-2014 \"Functional indicators and graphic symbols for process measurement and control instruments\"