Motor controlsQuestion 31 of 1506

After a program is loaded into a PLC, the programming computer is unplugged. What happens?

  1. The PLC stops and loses its outputs
  2. The PLC reverts to its factory program
  3. The PLC keeps following its program
  4. The PLC outputs hold only if the cable is within 2 m
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Correct answer: The PLC keeps following its program

The computer is only for editing and viewing the program.

Source: Lessons in Electric Circuits IV: Digital (Kuphaldt), 6.6: Programmable Logic Controllers (PLC)

Practice motor controls

Questions last reviewed: 18 October 2026