In the PLC program cycle, which sequence best describes how inputs, logic, and outputs flow?

In the PLC program cycle, which sequence best describes how inputs, logic, and outputs flow?

• A. Inputs are sampled, then logic is evaluated, then outputs are refreshed.
• B. Outputs are refreshed before inputs are sampled.
• C. Logic is evaluated before inputs are sampled.
• D. Inputs and outputs are refreshed at the same time.

Answer: (A)