In previous lessons I wrote a PLC program for running the motor in both momentary and latched modes. In another lesson I wrote a PLC program to run and stop a heavy three phase motor and a fan with a single momentary switch. In the momentary program, there was only one switch that we could use as both a start and a stop switch, just like the power button you have on your TV remote.
In the previous lesson I added a parallel shortcut path to the program to be able to run the motor in the momentary mode but this didn’t help and the motor was still running in the latched mode when I pressed the switch. Now let’s see how I can modify current PLC program to be able to run the mot...
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