PLC Operation

Input Scan: Reads status of input devices (e.g., sensors, switches) and stores data in memory.

Program Execution: Processes input data using user-defined control program (e.g., ladder logic) to compute outputs.

Output Update: Sends control signals to output devices (e.g., motors, valves) based on program results.

Scan Cycle: Repeats input-program-output process rapidly (milliseconds) for real-time control.

Additional Functions: Handles diagnostics, communication (e.g., SCADA, HMI), and fault detection for reliable operation.