True or False: A servo motor controller's described role includes receiving sensor signals, controlling the system, and sending signals to a PLC.

• A. True
• B. False
• C. Not sure
• D. Depends on system

Answer: (A)

In a servo system, the controller acts as the brains of the setup. It uses sensor signals from the encoder or other feedback devices to know the actual position, speed, and sometimes torque of the motor. With that feedback, it runs the control algorithm to determine the difference between the commanded value and the actual value, then sends drive signals to the servo amplifier to correct the motion. A key part of modern servo systems is communication with the broader automation control network, so the controller typically provides status and can receive commands from a PLC or send information back to it via standard fieldbus or I/O interfaces. Because it both uses sensor feedback to regulate motion and interfaces with the PLC to coordinate the larger system, describing the controller as receiving sensor signals, controlling the system, and sending signals to a PLC matches how servo controllers operate in practice.