SC-UCMX01 51307195-175 In November 1975, Honeywell was the first company in the world to launch a microprocessor based Distributed Control system TDC2000(Total Distributed Control, TDC) system. After more than ten years of development, Honeywell's DCS has experienced many improvements and improvements, forming a huge product series.SC-UCMX01 51307195-175 The development process of the system is roughly