【Help】I’d like to ask everyone, what does this logic diagram mean?
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What does the vertical line after S in an SR flip-flop mean?
This post was last edited by Northwest Corner of the Wall on 2019-8-13 09:20, stating that priority should be given to resetting the S side! An RS flip-flop gives priority to the R terminal, while an SR flip-flop gives priority to the S terminal. If the flip-flop is not of the RS or SR type, then the legend indicates which terminal has a vertical line or is shaded, indicating which one has priority for reset.
Add bold formatting after S to indicate priority in setting the value; that is, if the R reset signal is present at the same time, S will be set first, allowing the valve to close with priority.
Hello, I also want to ask: if the reset conditions are met, is the valve open?
This is a logical setting commonly used in intermittent production; it is typically applied to the feeding of metering tanks or reaction vessels – that is, when the flow rate reaches a specified value or the liquid level reaches the high-alarm level, the feed valve is shut off via interlock； Resetting involves manual intervention, and this is necessary in order to resolve system failures.