How to use "memory unit"
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I am currently studying instrument construction drawings on my own. I would like to ask why the memory unit in the instrument logic diagram only has one output, but the legend symbol has two? thank you all
SR trigger, SOE record? Not sure what you're asking about
Isn't this based on demand? If you need one, just one, if you need two, just two. The one below is an SIS interlock. It only needs to be cut off but not turned on. Of course, it only requires a signal. It's also possible that it's just a solenoid valve that opens when powered on and closes when powered off.~
Thank you. I am a beginner now. There are two outputs in the legend of the picture above, but there is only one output in the picture below, so I don’t understand it.
Thank you, I am a beginner and don’t understand it at all. Why does the legend have two outputs, but the picture below has one output? If there is one, how should we look at it? Which output does it correspond to in the picture above?
If there is only one, it is usually S when drawn like this. If it is R, it will lead from R, or when drawing the frame, it will be RS instead of SR.
The memory unit in Figure 1 is a bistable flip-flop. A bistable flip-flop has two inputs, X, Y, and two outputs, Z, Z1. The X input is the set input and the Y input is the reset input. When X=1, Z is 1, Z1=0, and maintains this state ； When y=1, Z is 0, Z1=1, and maintains this state ； Z1 can be understood as the inverted output of Z. Figure 2 only takes one output of the bistable flip-flop. Usually, unless otherwise specified, Z is taken as the output. Z or Z1 can be selected according to logical needs, and two outputs can also be selected when necessary.