Free Download PLC Programming: An Introduction to PLC Programming for Beginners by Epris E. EzekielEnglish | August 31, 2024 | ASIN: B0DFVR94J9 | 47 pages | PDF | 0.76 Mb
We have to travel back in time to the 1960s to comprehend the function of a PLC. Imagine Barbie dolls, G.I. Joe action figures, transistor radios, and Chevrolet Impalas. During this time, electromechanical relays were used to control machine processes. Not just a few relays, either; some systems occupied whole walls. Still, there were other drawbacks to the relay-powered devices besides their size.