说明：  PID控制包的功能块(FB)包括了用于连续控制(CONT_C)和步进控制 (CONT_S)的控制块，以及用于脉宽调制(PULSEGEN)的FB。 控制器块实现了一个纯软件控制器，它所包含的功能块可以提供控制器 的所有功能。循环计算所需的数据存储在为FB分配的数据块中。这样， 便可以按照需要频繁地调用FB。 功能块PULSEGEN和功能块CONT_C一起，可实现具有脉冲输出的控制 器，用于控制比例执行器。
(PID control packet function blocks (FB) includes a control block for continuous control (CONT_C) and stepper control (CONT_S), and FB for pulse-width modulation (PULSEGEN)' s. The controller block implements a pure software controller function blocks can provide it contains all the features of the controller. Cycle to calculate the required data is stored in the FB allocated data blocks. Thus, they can call the FB frequently as needed. Function blocks and function blocks CONT_C PULSEGEN together, can achieve a pulse output controller for controlling the ratio of the actuator.)