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The dust removal system of a certain power plant was controlled by omron programmable Logic controller (PLC). It needs to be included in the master control system DCS (distributed control system) in order to fit the request of all control systems integration. Using a network protocol converter realize the Profibus-DP and DeviceNet fieldbus networks communication, which are two networks with heterogeneous protocol. So a two levels supervisory control system is built. The Siemens PCS7 is the main control system, and omron PLC is the control subsystem. By Siemens PCS7 system configuration, the upper level monitoring program CFC configuration, remote monitoring picture configuration, the gateway PD-100S Settings and omron PLC system configuration, the dust removal system is included in power plant main control system PCS7. The retrofit scheme needs small amount of new equipments. Hardware and software configuration and parameters setting are simplfy. Under the existing dedusting system data update quantity, the system can reliably realize the remote monitoring. The scheme can provide a reference for the integration of heterogeneous fieldbus system. Keywords—protocol converter; fieldbus; distributed control system; heterogeneous compatible; remote monitoring; integration transformation

Build of Dust Removal System Controlled by DCS and PLC Two-level Supervisory Control System