System design of electric locomotives operational safety monitoring network based on PROFIBUS-DP

Considering the actual situation and the use requirements of electric locomotive operation readiness in our country, we designed a security network control system based on PROFIBUS-DP. The systems implement the communications between a master class and third-party equipment, as well as the interactive operation from PLC and non-contact IC card to SCM System. We described the Multi-task scheduling mechanism and the security of data communications of Monitoring Network System details. At last, we did a perfect laboratory debug to this network control system, and we got satisfactory results, laid a good foundation for the promotion and application in railway system.