Which device coordinates multiple servo axes by communicating with a PLC in a typical system?

• A. Servo motor controller
• B. Amplifier module
• C. Sensor interface
• D. Power supply

Answer: (A)

Coordinating several servo axes while interacting with the PLC is the job of the servo motor controller. This device acts as a motion controller: it takes high-level trajectory commands from the PLC, computes coordinated paths for multiple axes (ensuring they move in sync and reach targets together), and then drives the individual servo amplifiers while using encoder feedback to keep the motion precise. The other options don’t handle multi-axis coordination or PLC communication: an amplifier module powers a single axis, a sensor interface translates sensor signals to the PLC, and a power supply just provides electrical power.