Implementation of a PLC and OPC-based DC motor control laboratory

摘要

In this study, a computer-controlled education tool was designed for adjusting the speed of a DC motor using a PLC. While the motor speed was measured with a tachogenerator, the motor voltage was controlled with a PWM signal generated by the PLC. The driving circuit was tested using a 4W-DC motor. OPC server was employed for not only ensuring the communication between ProfiLab-based interface and PLC but also real-time monitoring and control. The motor speed was controlled in a sensitive and accurate way using the designed education tool. As a result, it is shown that the designed education tool is usable and practical for vocational and technical education.