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 necessary switch actuation statuses (i.e. pressed versus unpressed) to turn the lamp on given the following program running in the PLC:
Answer :
Necessary switch statuses:
- Switch A = pressed
- Switch B = pressed
- Switch C = released
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Credits : Tony R. Kuphaldt – under CC BY 1.0
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