Who can explain in detail how to use an RS flip-flop?
Thread Content
I’m currently working on the ethylene glycol air-blown project, and the pressure is huge. I used to work with PVC processes; now I’ve been assigned to this new project. There are many functions that I’ve never used before, and there are too many logical interconnections, which makes it difficult to understand. RS flip-flops come in versions with dual outputs or single output, as well as those with or without a reset function. Could someone explain in detail how these are applied in the LC64 logic circuit? What are the differences between triggering based on the R terminal versus the S terminal?
The system we use is Yokogawa CENTUM VP
This post was last edited by zhangyili on 2018-4-20 at 11:28. The original poster doesn’t need to understand the internal logic of RS/SR flip-flops. A truth table is all that's needed. It’s simply a matter of which one takes priority and what the output will be.
Thank you. I don’t understand why RS flip-flops have to be used for controlling electrical equipment; in some cases where the RV2 conditions are met, no action is taken at all, and I can’t see the purpose of that. Using sequential control or separating the logic functions can also achieve the same purpose of process interlock
RS is equivalent to a packaging module, and you need to write the logic yourself; P