Regarding the logical approach of choosing three out of eight
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The company requires an interlock that adds 8 and then takes 3; is there any convenient way to implement this?
This can be implemented as a functional block using AND or OR gates
Convert these eight boolean variables into integer values, then add them together, compare the result with three, and output the result of the logical operation.
Is this approach used in actual engineering projects? (｀・ω・′)
This method is basically used for n choose m when the result is two or more out of three. We have applications such as four-out-of-two, ten-out-of-three, and so on. This is the most basic mathematical method.
Do addition, subtraction, multiplication, and division as you like; have you never done PLC programming before?
We’ve learned it; we use three choices and pick two
I agree with what was suggested on floor 3; that way it’s much simpler! ! ! !
If it’s tricon, the numbit function can be used; it seems to count the number of 1s, and as long as this value is greater than 3, it’s fine. In the case of 0, inversion can be applied for interlock purposes