Anti-jamming study on correspondence between PC and single chip micro-controllers in distributed control system

Beginning with the confoguration of distributed control system, the paper analyses the primary factors which disturb the correspondence between PC and single chip micro-controllers in the distributed control system under industrial environmental conditions . On the basis of analysis, in the first place the paper gives several effective methods to increase anti-jamming capacity used to design a hardware system including single chip micro-controllers system, communication interface and communication cable. Discusses all kinds of effective measures to improve anti-jamming capacity in the side of software design. Introduces a kind of communication interface circuit which uses photoelectric isolation technology to convert RS232 level directly into RS485 level and the anti-jamming capacity of the distributed control system is improved greatly by using the circuit.