Study of the Industrial Wireless Control Network Security Based on Elliptic Curve Cryptography

Industrial wireless control network brought great convenience in industrial production, and security issues was very important. This paper analyzing the characteristics of the wireless industry control network, and presented a perspective which based on elliptic curve cryptography system, at last, introduction to design a hierarchic structure of the ECC integral solution, then make it better applied to the industrial wireless environment.

Data Transmission Mode of a Small-Scale, Real-Time Industry Control Network

MAC protocol of bus control network has important influence on its real-time feature. Combining Profibus-DP protocol and Token Bus protocol, a new bus model suitable for small-scaled control system is put forward. Under the principle that follows a control network whole balance, the LAS and GAPL maintenance process in token passing mode and master-slave polling process in data exchange mode of Profibus-DP are discarded. The basic cutting thought of this bus model is summarized; its concrete realization is illustrated in detail, theoretical maximal value of message transmission time and actual test result are presented. The experiment result shows the system’s real-time characteristic is improved, and come to the expectant result.

The Research of Network-Based Remote Monitoring Systems in the Scattered Site

With the exaltation of the function and the performance of the PLC technique, the application of the industry control network become more and more universal. Particularly In the application whose geography location is scattered and the stand is numerous, it can raise the Networked level completely by a control system renovation. This text mainly introduced PLC network technique which uses PLC as core controller, and makes use of existing telephone network and modem of business as communication line. It enables us to achieve active and passive communication between the master computer and the PLC slave. It focused on solving the call between the PLC and the modem. Finally, it realizeed fully automated monitoring of heat exchanger and water pump station.