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Industries make use of PLCs to control bulk electronic devices and it is found that combining them with motor drives such as VFDs, the efficiency of induction Abstract - The paper is about controlling the speed of a three phase induction motor using variable frequency drive(VFD) through programmable logic Speed Control of Three Phase Induction Motor Using PLC under Open and The objective of the work is to monitor and control the speed of an Induction motor Abstract: Automation is the process of handling various parameters of process like flow, Where classic control there is difficulty in maintenance therefore, use logic controller (PLC) correlates the operational parameters to the speed Abstract: The paper is about speed control of three phase induction motor using PLC (programmable logic controller) through VFD (variable frequency drive). Basically, Programmable logic controller is used as a process controlling device which is mainly used by automation industries. The combination of PLC and VFD provides an efficient approach for getting a motor with continuous running. It is cost effective method along with huge amount of energy saving. By this method the variable frequency is set by VFD and speed can be change as per requirement. The entire control system is switch by PLC. The control of three phase induction motor is applied with VFD, PLC and monitored Growth of Industries leads to the reduction of manual controls day by day. ABSTRACT. In today's world industries demand process automation in all sectors, because automation results in better quality, increased production and Some processes have been completely controllers (PLC) to connect with computers to monitor each automated. The motor speed is controlled via the driver as Some processes have been completely controllers (PLC) to connect with computers to monitor each automated. The motor speed is controlled via the driver as