Abstract
Three mixed liquid filling control , for example, the three liquid by mixing , stirring after the motor in order to reach a certain temperature output of the mixed liquid container . And the formation of cyclic state. Control system design liquid mixing operation taking into account the continuity of their respective controlled and interconnected equipment operation between different working conditions, the control output of the corresponding action in order to achieve a liquid mixture from a liquid system by adding to complete such a cycle the output to the mixing control operation program . Liquid mixing system designed to control the center , from the control system hardware components, software selection to the system design process ( including design, design process , design requirements, ladder design , external connections and communications ) , which aims to design and production process to make a brief introduction and description. 1 Design Throughout the design process is based on the design thinking process for equipment installation, operation, maintenance and protection services . Designed to prepare written about in accordance with national electrical automation engineering design of electrical equipment used basic graphic symbols (GB4728) and other relevant standards and specifications . Design principles include: working conditions ; specific information works on the electrical control circuit provides. System in ensuring the safe, reliable, stable, fast premise , as far as possible the economic , reasonable, combined , reducing equipment costs. In options , the more consideration new technologies, new product selection components . Controlled by a manual control to automatic control, analog control to the microcomputer control , so that to realize the function by a numerous and more perfect . To realize the entire liquid mixture control system design , need to realize how each switch and solenoid valve control motor starting to consider this perspective , the question now is how to achieve and choose what method to determine system solutions .
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