Programmable Logic Controller(PLC) And Its Application To Automatic Control System Of Coal-whipper Machine For The Power Plants

This paper reaserchs hanfeng power station coal-whipper machine about electrical control system which can not achieve full range automatic operation, poor security, high failure rate, low working efficiency. Transformation should be carried out. To determine using PLC control system with the overall digital transformation of computer programs. Comprehensive use of industrial machines, programmable logic controller (PLC), inverter and other components of modern control. By combining the existing electrical system circuits, system control from coal-whipper machine part of the overall structure, software program designing, and electrical interlocking. Designed to the main part of overturn electrical control system to achieve automatic roll-over.The process mainly include PLC hardware selection, software design, PLC control part of the safety and reliability of software functions into industrial computer, reliability design of industrial computer software. After transformation, coal-whipper machine system all the processes used to local, manual focus and PLC program automatic control. The normal way is PLC control. Coal-whipper machine system through industrial computer keyboard, mouse input, all signals are displayed and the system flow chart dynamic display by CRT. After transformation, the system implements the full range auto operations, improves work efficiency. Enhanced transformation of the interlocking relationships between various devices, so that coal-whipper machine system equipment operation safety greatly improved. For the control site of electromagnetic interference inevitable scene also made some research, take some anti-jamming measures. Research and development work in this peper can be done on the same equipment and general industrial control have reference value.