Design of communication port between DCS and computers of RTU

Distributed control system (DCS) has been widely employed in power plants to control and monitor field instruments of plants. The compatibility and a high speed communication between DCS and the existing computer systems such as remote terminal unit (RTU) and management information system (MIS) are problems when employing a DCS. In order to realize a direct communication between computers of RTU and DCS, the structure of the WDPF type DCS made by the Westinghouse Company of American is analyzed in detail in this paper. By analyzing its inner agreement on communication, a port between the WDPF type DCS and the computers of RTU is designed, which includes the hardware layout and correlative software disposal.