为了驱动上述的自动化机构,控制回路是必不可少的。就控制的手段而言,控制回路包括从只使用一个限位开关或一个限位阀那样的简单回路到使用小型计算机那样的复杂回路。但是本书刊载的自动化机构只是自动化机构的一部分,通常总是一个机构动作后,下一个机构再动作。因此,控制回路也应在一个机构动作结束后,向外发出动作完成信号,待动作的 In order to drive the above-mentioned automation mechanism, the control loop is indispensable. In the case of controlled means, the control loop consists of a simple loop from using only one limit switch or a limit valve to a complex loop using a small computer. However, the automation organizations covered in this book are only part of the automation organization, usually one organization action, and the next one. Therefore, the control loop should also be in the end of an agency action, outward action issued to signal completion, to be action