Induction Motor Speed Control using PLC And SCADA

Automation can be defined as the technology by which a process or way is performed without human succor. Automatic control, is the use of various control system for operating equipment such as machinery, processes in industries, boilers and electrostatic precipitator, switching on communication networks, navigation and stabilization of ships, aircraft and other applications and vehicles with trifling human intervention. Some processes have been completely automated. The motor speed is controlled via the driver as an open loop control system. To make a more accurate closed loop control of motor speed we will use a tachometer (revolution-counter, tach, rev-counter, RPM gauge) to measure the speed and feed it back to the PLC, which compares to the desired value and take a control action, then the signal is transferred to the motor – via driver – to increase / decrease the speed. We will measure the speed of the motor using an incremental rotary encoder by adjusting parameters (PLC, driver) and also, we need to reduce the overall cost of the system. Our control system will be held using the available Siemens PLC. In addition, we will monitor motor parameters via SCADA system.