本文结合味精发酵罐的控制要求,采用集散系统中基本控制器的设计原则,就现场输入信号的处理,PID调节规律的实施等方面作了详细说明。着重对现场控制中经常遇到的一些问题,如A、B调节方式、正负调节作用、切换测量值跟踪、限值比较、抗积分饱和、输出限幅、多周期调节处理等提出了切实可行的方法。文中还具体阐述了DEP操作面板功能的全部实施方案。 In this paper, the control requirements of MSG fermentation tank, the basic principles of the design of distribution system controller, the input signal processing on the site, the implementation of PID regulation and other aspects made a detailed description. Focus on the field of control often encountered some problems, such as A, B regulation, positive and negative regulation, switching measurement tracking, limit comparison, anti-integral saturation, output limiting, multi-cycle adjustment process put forward feasible Methods. The article also specifically describes the DEP operation panel features all the implementation plan.