可编程控制器{外文翻译}.rar

可编程控制器{外文翻译}

包含中文翻译和英文原文，内容详细完整，建议下载参考！

中文： 6638 字
英文： 19627 字符

介绍
可编程逻辑控制器(PLCs)作为控制器件已经在机械系统中建立了一个不可动摇的地位。因为他们占优势的编程模式是梯型逻辑，基于继电器逻辑，他们通常被看成一个完全不同级别的胜于以计算机为基础的控制器算法语言的程序设计，像C语言。结果使那些略微怀介意的使用 PLCs和使用计算机的人分离开。
通过对机械系统控制软件(mechatronic软件)工作/状态设计和执行模块的使用，这两个表面上不同的方法在实现机电一体化系统控制中能够互相兼容。因为设计模块涉及到计算的实现，控制系统设计能够容易的在PLCs和计算机之间相互转化。这种统一是能够实现的，因为算法软件设计是基于导致扫描计算结构的完全无块码的设计。这结构和PLCs使用的梯形扫描法则是完全地一致。
机械控制系统的特点是相关的控制实施都经过计算。控制在这里包括控制功能性的全部阶段：先后顺序，操作员接口，安全，诊断和信号处理 ......



Introduction
Programmable logic controllers (PLCs) have established a firm place as control elements for mechanical systems. Because their dominant programming model is ladder logic, based on relay logic, they are usually viewed as an entirely different class of device than computer-based controllers programmed in algorithmic languages such as C. The result is separate, somewhat hostile communities of people, those who use PLCs and those who use computers.
Through the use of a task/state design and implementation model for mechanical system control software (mechatronic software) these two seemingly disparate means of implementing mechatronic system control can be reconciled. Because the design model relates closely to its computational realization, control system designs can be transported between PLCs and computers relatively easily. This reconciliation is possible because the algorithmic software design is based on fully nonblocking code leading to a scanning computational structure. This structure is completely consistent with the rung-scanning algorithm used by PLCs.
Mechatronic systems are characterized by relatively sophisticated control implemented through computation. "Control" in this context covers the full gamut of control functionality: sequencing, operator interface, safety, diagnostics, and signal processing, in addition to feedback control functionality where needed. Two technologies to implement this control have existed side-by-side ......