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.
