A Distributed Control System Communication Mode Based on UDP Datagram and Dual-Port Memory

This paper try to promote a data exchange mode based on dual-port RAM and UDP datagram to achieve high-speed data communications in distributed control system. The purpose is to explore a high-performance, low CPU occupancy, high-speed, reliable exchanging mechanism for any amount of data. The model proposed a Dual-port RAM that one port connects the local CPU and the other port connects specific control logic that have reading and writing the Dual-port RAM and net communications functions, the control logic undertakes organizing, sending and receiving and analyzing UDP datagram and achieves the dual-port RAM reading and writing and sends interrupt requirement to the local processor. This model can not only implement efficient data exchange but also provide of interruption mechanism of real-time responding. The paper discusses the needed function modules for achieving these aims and expounds system composing and technical advantages. The paper also analyzes the system developing feasibility, and demonstrates that this model is an advanced, high-performance and promising communication program of distributed control system.