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介绍用PNA3可编程调节器在工业锅炉汽包水位自动控制系统中的应用实例，介绍了利用PNA3软件模块组态编程实现复杂控制回路的PID调节功能。
This paper introduces the application of PNA3 programmable regulator in the automatic control system of industrial boiler drum water level, and introduces the PID adjustment function of complex control loop using PNA3 software module configuration programming.