Allen-Bradley Programmable Logic Controller (PLC) Questions and Answers
Suppose we have an Allen-Bradley MicroLogix 1000 controller connected to three pushbutton switches as shown in this illustration:
Determine the status of each lamp given the following program running in the PLC, assuming switch A is unpressed, switch B is pressed, and switch C is unpressed:
The blue lamp will be off and the yellow lamp will be on.
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Credits : Tony R. Kuphaldt – under CC BY 1.0
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