Logic Gates in PLC ( Simatic STEP7 Siemens):Part-2
In this video logic gates "NOR, XOR, XNOR" are taught.
In the previous video, logic gates "Buffer, Not, AND, OR, NAND" were taught.
This video is one of the most important videos of this channel.
In this video, I teach logic gates in "Simatic Step-7" software, from Siemens S7-300 and S7-400 series PLCs.
These gates include "Buffer","NOT","AND","OR", "NAND","NOR","XOR" and "XNOR".
Each of the "Buffer" and "not" gates has "one" input. I teach other gates with 2 and 3 inputs.
Each of the gates is programmed in 3 languages:
LAD, STL and FBD.
These languages can be converted to each other with the View option.
For a better understanding of how it works, each gate is simulated along with the "Truth Table" of that gate.
"Truth Table" has 2 possibilities in gates with one input.
In gates with 2 inputs, there are 4 possibilities.
And in gates with 3 inputs, there are 8 possibilities.
In general, the number of possibilities in the "Truth Table" is equal to:
2 to the power of N.
where N is the number of "inputs".
In the Truth Table, the logic that turns the output on or off is checked.
Off is shown as zero and on is shown as one.
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