Do PLC’s use logic gates or Logic Ladders?

[Mewada Hiteshkumar Chenabhai]

Hello All,

Do PLC's use logic gates or Logic Ladders?

I've been asked to explain two different types of stop/start/retain relay control circuits for suitable for either the AC or DC

I'm going to compare an electro-magnetic relay system with an electronic logic or PLC system but I'm not sure if I'm getting a PLC and Electronic logic system mixed up or they are both the same?

Replies would be gratefully appreciated.

[Siddhartha A]

PLC use logic ladders. However, logic gates can be implemented on PLC using ladder diagrams. the problem given to you can be solved using ladder logic with a proper flowchart to solve the problem

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