Networked based control and supervision of induction motor using OPC server and PLC

This paper presents the control of induction motor via PROFINET network including a remote control using the OPC (OLE for Process Control) standard. This system is composed of induction motor, encoder, frequency converter, PLC (Programmable Logic Controller) and two PCs (server and client). The motor control is PLC based with PID (Proportional-Integral-Derivative) controller, while PCs are used as HMI (Human Machine Interface) devices for controlling and supervising the plant. PC which represents OPC server is connected with PLC via Ethernet network, while connection between frequency converter and PLC is established via PROFIBUS DP protocol. Two PCs are connected using OPC standard, where physical connection between them is achieved using LAN (Local Area Network). The obtained experimental results demonstrate a possibility to establish local and remote control over our system while ensuring system´s stability and efficiency.