Abstract:Based on the incident of a newly built power plant site fieldbus equipment segment failure caused desulfurizer absorption tower liquid level meter transmitter missend low level signal, and result main fuel trip (MFT) and unit trip, site fieldbus control system (FCS) logical configuration, fieldbus equipment segment design and equipment installation was tested and analyzed, and main caused was found. Treatment was indicated and effectively resolved the missending of low level signal. 

Keywords:logical configuration, segment design, equipment installation