Which component enables automation in assembly lines, autonomous field operations, robotics, and other applications?

Which component enables automation in assembly lines, autonomous field operations, robotics, and other applications?

• A. HMI
• B. SCADA
• C. CAN
• D. Programmable Logic Controller (PLC)

Answer: (D)

Real-time industrial control relies on a device that reads sensors, processes logic, and drives actuators to maintain the desired operation of machines and lines. This role is filled by the Programmable Logic Controller. A PLC is built to run control programs quickly and deterministically in harsh factory environments, handling input/output (I/O) for sensors and actuators, sequencing, timing, counting, and even simple control loops like PID. It can communicate with other devices and systems over various networks, and it’s designed to be reprogrammed and reconfigured as processes change, which is essential on automation lines, autonomous field operations, and robotics.

HMI is about operator interaction and display, not controlling processes by itself. SCADA provides supervisory control and data acquisition across larger systems and often relies on PLCs for the actual control logic. CAN is a fieldbus used for networked device communication, not a standalone control system.