Variable Frequency drive is used as energy saving device for some of the machines to save power during no load or it is used as final control element of the closed loop control application where the speed of the motor is changed to control one parameter. Some of the application is provided with manual speed control of the motors. These are the open loop control applications.

Ease in modification of logic, reduced size, means of remote communications and advances in the technology have made PLC Automation Control Panels an edge over conventional relay based systems. Control Systems Engineers has provided PLC based Panels from PLC of Allen Bradley, Siemens, Modicon, GE Fanuc. From small IO application to the complex IO systems are provided by the Control Systems Engineers. Control Systems Engineers have developed communication software's for remote communication of the PLC Panels in various different protocols. With PLC based Panels HMIMMI are provided to provide the operator various messages and controls of the process plants touch screen MMI are provided. To effective control of the system.