Design of 3 Phase Motor Control System Using PLC with Raspberry Pi Based on Internet of Things (IoT) System

— PLC is currently widely used as a control component in a large control system. Based on the cost efficiency and the equipment used, the control was designed using the Raspberry Pi for Internet of Things (IoT) system. One of the IoT systems is to use a web server as an interface between the user and the machine. PLC can function as a PLC Master that controls the work of the PLC Slave. In the design of automation systems in a building using two Slave PLCs each as motor control for elevator and star-delta starting motor control used for industrial machines. The simulation shows that communication between the web server from Raspberry Pi to the PLC can be done and synchronous between one command to another. The simulation results on the PLC Master working system can work well and efficiently. The results of the voltage and current on the motor are quite stable and in accordance with the standards of the motor value itself