Design Of Communication And Relevant Software For DCS And System Debug

Technologies of DCS communication, correlative software design and technical details of system debugging are elaborated in this paper. The system is mainly composed of four parts, which can be depicted as on-site control stations, engineer stations, operator stations and on-site controlled object. The on-site control station, which plays a crucial role in the monitoring system, accomplishes the functions of real-time I/O data acquisition, I/O data processing and network service based on MIC-2000. The engineer station controls configuration of site information and algorithms, so as to reduce the workload of parameters debugging while the system is working. An operator station monitors the field and achieves soft manual operation through the development of the man-machine interface.Software system of operator stations, engineer stations and on-site control stations are developed or upgraded, also the whole system is debugged. Wherein, an operator station shows the man-machine interface by "KingView" and completes the communication between "KingView" and system based on OPC protocal. Besides, the old version operator station is transplanted and upgraded, with the correlative API parameters or bytes of data type being upgraded to a32byte operator system environment. Meanwhile, the process of configuration, compilation and download is also introduced in detail. After that, the project complementally develops on-site control stations and calls related algorithm modules by analyzing upper machine configuration information so as to realize closed loop control. Setting the double-water tank system as the controlled object and by a long time testing on the detecting of liquid level, the system can meet the expected control requirements.