Abstract: This paper combines the characteristics of the curent electrical control systems PLC and DCSin the pharmaceutical, tobacco and other process industries. In a company's electrical control systemtransformation project, it proposes the overall design and configuration of two sets of electrical control system, forming a bottom-up fully integrated automation architecture including sensor , actuator and control.ler and host computer. Through the actual application verification, the design fully meets the technical requirements of the project, which can save costs for the enterprise.

Key words: PLC;DCS, electronic control system