With the development of electronic technology, the plastic injection molding machine controller which applied a single CPU core in the low-end plastic injection molding machines cannot meet the need. In order to resolve the problems of the current plastic injection molding machine controller, which include big volume, low integration, complexity hardware, low reliability, low price-performance ratio, and unsatisfactory control effect, a high level of integrated fully automatic plastic injection molding machine controller which based on multi-CPU will be researched. Multi-CPU is used for hardware design. The adaptive intelligent control algorithm is applied on software design in order to achieve accurate temperature control. At the same time, the output circuit detection technology is used to make the perfect combination on hardware and software. Practice has proved that the new utility model have improved the reliability and the accuracy of the injection molding machine controller, and the controller have the benefits of high integrated of hardware system, simple structure, high performance-to-price ratio and so on.

PLC is used as a controller for the high-voltage motor magnetic controlled soft starting device generally. A single trigger board is required to produce trigger pulse, and a synchronous transformer is need also. It is the high cost and low reliability of the control device. A new controller of magnetic controlled soft starting for middle-high voltage is developed. Two low-performance CPU is used to improve the processor capacity and reduce hardware cost. Large plate of a circuit board structure was used to reduce the size of the controller. All input and output apply the optical coupler isolation, and output signal was tested cycle for the correctness to improve the reliability.