Everything for Electronics
Nuts & Volts Magazine (March 2005)

Getting Started With PLCs - Part 2

By David Ward    View In Digital Edition  

Last month, Part 1 provided a basic introduction to PLC programming, and this month, additional information and PLC programming features will be discussed, including a more complicated circuit — the roll-up door opener controller. The first article also left us with a start/stop circuit that did not have a hold-in feature; you had to hold the start button in to keep the motor running, which is inconvenient.


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