Design of additives distribution automatic control  system based on PLC

FU He-tan， XIANG Zhong， SHI Wei-min
（Faculty of Mechanical Engineering & Automation， Zhejiang Sci-Tech University， Hangzhou 310018， China）

Abstract： Aiming at the current domestic industry of printing and dyeing additives in distribution link：automation degree low，high labor costs，a set of programmable logic controller（PLC） as the core of the additives distribution control system was developed. The pipeline structure of the distribution system， the hardware structure of special analog signal conditioning were designed. Meanwhile computer program and human-machine interfere were developed. On the basis of reduce the error learning method，the filtering software was used to process the signal，and valves action were displayed on the touch screen. The experimental results show that the system is stable and strong in anti-disturbance capability，it not only reduces the production cost，but also improves the production efficiency.
Key words： programmable logic controller（PLC）；reduce the error learning method；additives distribution