浅谈西门子PLC控制程序的保护

中文字数:2948,英文字数:1785

浅谈西门子PLC控制程序的保护

 设计理论发展的今天,首要重点大部分设计开发研究,是基于机械和电器产品. 其中的副产品,这项研究是为了提高我们的基本了解设计理论和方法 扩大到该领域的工程系统设计. 一个制度设计的理论,进行大规模而复杂的制度尚未完全建立. 尤其 至于如何简化复杂或复杂的设计任务,尚未解决的一个科学的方法. 此外, 建设桥梁设计理论和最新成果的认识论的正式交涉,在计算机科学和运筹学 如离散事件系统建模,可以促进未来的发展,工程设计. 应用在逻辑硬件设计,从逻辑的角度来看, PLC的软件设计类似的硬件集成电路设计. 现代超大规模集成电路设计是非常复杂的数百万件,产品开发时间为3年,[云妮,1996〕.
T.I.A（全集成自动化）的概念有助于保护我们的KNOW HOW T.I.A实现了组态和编程，数据管理和通讯，自动化与驱动产品（包括PLC控制器、HMI人机界面、网络、驱动器等产品）的高度集成。实践证明，采用T.I.A集成概念设计的控制系统很难被抄袭。同一个软件平台，相同的硬件组成，一样的总线通讯，完全可以设计出截然不同的控制系统，这是一个让开发者自由发挥的平台。例如，一个CPU315-2DP和2个MM440变频器进行PROFIBUS-DP的通讯，除了PLC和变频器有常规的数据交换，如果用户使用了DRIVES ES的工程软件，还能实现2个MM440之间的直接的快速数据交换，另外通过DRIVES ES还能实现PLC和MM440之间超过10个总共16个PZD过程数据的交换，实现PLC批量下载变频器参数的功能。而这一切的实现从表面上看，硬件没有发生任何的变化，仿制者很难从硬件上来判断出系统是如何控制这两台驱动器的速度的。不熟悉西门子产品的仿制者无法轻易更换硬件配置或修改软件，而即使仿制者是个西门子产品的专家，要独自分析清楚具体细节问题也不是件容易的事情。从某种程度上说，T.I.A大大提高了对仿制者的技术水平要求的门槛，达到西门子系统集成专家水平的技术人员一是不多，二很少有愿意做这些不齿的事情的。

On Siemens PLC control procedures to protect
 Design Theory Development
 Today, the primary focus of most design research is based on mechanical or electrical products. One of the by-products of this proposed research is to enhance our fundamental understanding of design theory and methodology by extending it to the field of engineering systems design. A system design theory for large-scale and complex system is not yet fully developed. Particularly, the question of how to simplify a complicated or complex design task has not been tackled in a scientific way. Furthermore, building a bridge between design theory and the latest epistemological outcomes of formal representations in computer sciences and operations research, such as discrete event system modeling, can advance future development in engineering design.
 Application in Logical Hardware Design
 From a logical perspective, PLC software design is similar to the hardware design of integrated circuits. Modern VLSI designs are extremely complex with several million parts and a product development time of 3 years [Whitney, 1996].
 TIA (fully-integrated automation) the concept contribute to the protection of our KNOW HOW TIA has the configuration and programming, data management and communications, automation and drives products (including PLC controllers, HMI human-computer interface, network drives, and other products) a high degree of integration. Practice has proved that the concept of using TIA integrated control system designed to be copied. The same software platform, the same hardware, the same bus communications, can design a completely different control system, this is a free play allows developers to the platform. For example, a CPU315-2DP and two MM440 converter for PROFIBUS-DP communications, in addition to a conventional PLC and inverter data exchange, if the user to use the DRIVES ES engineering software, but also to achieve between the two directly MM440 The rapid data exchange, and can achieve through DRIVES ES MM440 between the PLC and more than 10 a total of 16 PZD process of data exchange, and PLC bulk download converter parameters of the function. All this and the realization of the surface, there was no hardware changes, imitation, it is difficult to judge from the hardware of system is how to control the two drivers of the speed. Siemens not familiar with the imitation products are not easily replace the hardware or software modifications, and even if imitation is a product of Siemens experts, to clear itself of the details of the problem is not an easy thing. To some extent, TIA has greatly enhanced the imitation of the technical requirements of the threshold level, the Siemens system integration expertise to achieve the level of technical personnel First, not many, the few willing to do these things in the despised.

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